Interface Property
This class exists for two reasons
- To act as the internal documentation for the properties.
- To remove the need to declare a java static field for the property name in the protocol/implementation class. This reduces the footprint as the string is final and thus can be included simply as a String constant pool entry.
This class should not be shipped with the product.
This class has no methods, all it contains are String's which by are public, static and final since they are declared in an interface.
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Field Summary
FieldsModifier and TypeFieldDescriptionstatic final String
Allow database upgrade during alpha/beta time.static final String
Property that specifies the name of the hash algorithm to use with the configurable hash authentication scheme.static final String
Default value for derby.authentication.builtin.algorithm when creating a new database.static final String
Alternative default value for derby.authentication.builtin.algorithm ifAUTHENTICATION_BUILTIN_ALGORITHM_DEFAULT
is not available at database creation time.static final String
Property that specifies the number of times to apply the hash function in the configurable hash authentication scheme.static final int
Default value for derby.authentication.builtin.iterations.static final String
Property that specifies the number of bytes with random salt to use when hashing credentials using the configurable hash authentication scheme.static final int
The default value for derby.authentication.builtin.saltLength.static final String
static final long
static final String
static final double
static final String
static final String
static final String
static final String
static final String
static final String
static final String
static final String
derby.system.bootAll
Automatically boot any services at start up time.static final String
internal use only, passes the database classpathinto the class manager Undocumented.static final String
Property name for specifying checkpoint interval Undocumented.static final String
static final String
static final String
Creation of an access factory should be done with no logging.static final String
derby.database.classpath
Consists of a series of two part jar names.static final String
static final String
derby.database.propertiesOnlystatic final String
Turn on lock monitor to help debug deadlocks.static final String
Configuration parameter for deadlock timeouts, set in seconds.static final int
Default value for deadlock timesouts (20 seconds)static final String
Turn on deadlock trace to help debug deadlocks.static final String
Default connection level authorization, set to one of NO_ACCESS, READ_ONLY_ACCESS or FULL_ACCESS.static final int
Default value for abovestatic final int
The default value for LOCKS_ESCALATION_THRESHOLDstatic final String
static final int
The default value for XA transaction timeout if the corresponding property is not found in system properties.static final String
derby.static final String
db2j.deleteRootOnError
If we a new root is created while doing restore from backup, it should be deleted if a error occur before we could complete restore successfully.static final String
static final String
This property is private to Derby.static final String
This property is private to Derby.static final String
This property is private to Derby.static final String
static final String
derby.drda.keepAlive
client socket setKeepAlive valuestatic final String
derby.drda.logConnectionsstatic final String
static final String
static final String
derby.drda.portNumber
The port number used by the network server.static final String
derby.drda.securityMechanism
This property can be set to one of the following values USER_ONLY_SECURITY CLEAR_TEXT_PASSWORD_SECURITY ENCRYPTED_USER_AND_PASSWORD_SECURITY STRONG_PASSWORD_SUBSTITUTE_SECURITY
if derby.drda.securityMechanism is set to a valid mechanism, then the Network Server accepts only connections which use that security mechanism.static final String
derby.drda.sslMode
This property may be set to one of the following three values off: No Wire encryption basic: Encryption, but no SSL client authentication peerAuthentication: Encryption and with SSL client authenticationstatic final String
derby.drda.streamOutBufferSize size of buffer used when stream out for client.static final String
static final String
derby.drda.tracestatic final String
derby.drda.traceAllstatic final String
derby.drda.traceDirectory
The directory used for network server tracing files.static final String
derby.system.durabilitystatic final String
This is a value supported for derby.system.durability When derby.system.durability=test, the storage system does not force syncs and the system may not recover.static final String
derby.stream.error.field= className.fieldName returning an OutputStream or Writer objectstatic final String
derby.stream.error.file=absolute or relative error log filename Takes precendence over derby.stream.error.method.static final String
derby.stream.error.method=. returning an OutputStream or Writer object Takes precendence over derby.stream.error.field static final String
derby.stream.error.rollingfile.count=the rolling file countstatic final String
derby.stream.error.rollingfile.limit=the rolling file size limitstatic final String
derby.stream.error.rollingfile.pattern=the pattern A pattern consists of a string that includes the following special components that will be replaced at runtime: "/" the local pathname separator "%t" the system temporary directory "%h" the value of the "user.home" system property "%d" the value of the "derby.system.home" system property "%g" the generation number to distinguish rotated logs "%u" a unique number to resolve conflicts "%%" translates to a single percent sign "%" If no "%g" field has been specified and the file count is greater than one, then the generation number will be added to the end of the generated filename, after a dot.static final String
derby.stream.error.style=The error stream error style. rollingFile is the only file currently supported.static final String
derby.stream.error.ExtendedDiagSeverityLevel=integerValue
Indicates the minimum level of severity for errors that are reported thread dump information and diagnosis information depends on jvm vender.static final String
derby.storage.fileSyncTransactionLogstatic final String
derby.database.forceDatabaseLock
Derby attempts to prevent two instances of Derby from booting the same database with the use of a file called db.lck inside the database directory.static final String
static final String
List of users with full access connection level authorization.static final String
static final String
static final String
static final int
The bump threshold for pages size for index.static final String
db2j.inRestore
This Property is used to indicate that we are in restore mode if if the system is doing a restore from backup.static final String
The size of the permissions cache used by the data dictionary.static final int
static final String
The size of the sequence generator cache used by the data dictionary.static final int
static final String
Name of the implementation of SequencePreallocator which is used to tune how many values Derby pre-allocates for identity columns and sequences.static final String
The size of the stored prepared statment descriptor cache used by the data dictionary.static final int
static final String
The size of the table descriptor cache used by the data dictionary.static final int
static final String
derby.language.stalePlanCheckIntervalstatic final String
derby.locks.escalationThreshold
The number of row locks on a table after which we escalate to table locking.static final String
static final String
Configuration parameter for lock wait timeouts, set in seconds.static final String
derby.storage.logArchiveMode
used to identify whether the log is being archived for the database or not.static final String
derby.stream.error.logBootTrace
defaults to false.static final String
Property name for specifying log Buffer Size Undocumented.static final String
derby.storage.logDeviceWhenBackedUp
This property indicates the logDevice location(path) when the backup was taken, used to restore the log to the same location while restoring from backup.static final String
derby.infolog.append={true,false}
If the info stream goes to a file and the file already exist, it can either delete the existing file or append to it.static final String
derby.stream.error.logSeverityLevel=integerValue
Indicates the minimum level of severity for errors that are reported to the error stream.static final String
Property name for specifying log switch interval Undocumented.static final long
static final int
Minimum value for abovestatic final int
The minimum value for LOCKS_ESCALATION_THRESHOLDstatic final String
Declare a set of classes that the class for a module or sub sub protocol requires.static final String
Declare a minimum JDK level the class for a module or sub sub protocol supports.static final String
derby.module.modulenamestatic final String
static final String
derby.database.noAutoBoot
Don't automatically boot this service at start up time.static final String
The default page size to use for tables that contain a long column.static final String
The page size to create a table or index with.static final String
The property name used to get the default value for XA transaction timeout in seconds.static final String
derby.storage.propertiesId
Stores the id of the conglomerate that holds the per-database properties.static final String
Name of the file that contains system wide properties.static final String
By convention properties that must not be stored any persistent form of service properties start with this prefix.static final String
static final String
List of users with read-only connection level authorization.static final String
Property name for specifying the size of the replication log buffersstatic final String
Property name for specifying the maximum log shipping intervalstatic final String
Property name for specifying the minimum log shipping intervalstatic final String
Property name for specifying whether or not replication messages are written to the logstatic final String
static final String
Derby supports Row Level Locking (rll), but you can use this property to disable rll.static final String
Internal.static final String
static final String
static final String
static final String
derby.drda.startNetworkServerstatic final String
static final int
static final String
Tells if automatic index statistics update is enabled (default is true).static final String
Specifies the lower threshold for the absolute difference between the row estimate for the table and the row estimate for the index before creating statistics for the associated indexes.static final int
static final String
Specifies the lower threshold for the number of rows in a table before creating statistics for the associated indexes.static final int
static final String
Specifies whether to revert to 10.8 behavior and keep disposable stats.static final String
Specifies the lower threshold for the logarithmical (natural logarithm e) difference between the row estimate for the table and the row estimate for the index before creating statistics for the associated indexes.static final double
static final String
Specifies the size of the work unit queue in the index statistics update daemon.static final int
static final String
Tells if activities related to automatic index statistics update should be written to the Derby system log file (derby.log).static final String
Tells if more detailed activities related to automatic index statistics update should be traced.static final String
db2j.storage.dataNotSyncedAtAllocationstatic final String
db2j.storage.dataNotSyncedAtCheckPointstatic final String
db2j.storage.logNotSyncedstatic final String
derby.storage.tempDirectory
Sets the temp directory for a database.static final String
derby.storage.useDefaultFilePermissions = {false,true}static final String
derby.subSubProtocol.xxxstatic final String
derby.system.home
Property name for the home directory.static final int
The bump threshold for pages sizes for create tables If the approximate column sizes of a table is greater than this threshold, the page size for the tbl is bumped to PAGE_SIZE_DEFAULT_LONG provided the page size is not already specified as a propertystatic final String
static final String
static final String
static final String
static final String
static final String
static final String
static final int
Default value for wait timeouts (60 seconds)
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Field Details
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PROPERTIES_FILE
Name of the file that contains system wide properties. Has to be located in ${derby.system.home} if set, otherwise ${user.dir}- See Also:
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PROPERTY_RUNTIME_PREFIX
By convention properties that must not be stored any persistent form of service properties start with this prefix. These properties are not documented.- See Also:
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LOG_SEVERITY_LEVEL
derby.stream.error.logSeverityLevel=integerValue
Indicates the minimum level of severity for errors that are reported to the error stream. Default to 0 in a "sane" server, and SESSION_SEVERITY in the insane (and product) server.- See Also:
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EXT_DIAG_SEVERITY_LEVEL
derby.stream.error.ExtendedDiagSeverityLevel=integerValue
Indicates the minimum level of severity for errors that are reported thread dump information and diagnosis information depends on jvm vender. Default to SESSION_SEVERITY(40000).- See Also:
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LOG_BOOT_TRACE
derby.stream.error.logBootTrace
defaults to false. If set to true logs a stack trace to the error stream on successful boot or shutdown. This can be useful when trying to debug dual boot scenarios especially with multiple class loaders.- See Also:
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ERRORLOG_STYLE_PROPERTY
derby.stream.error.style=The error stream error style. rollingFile is the only file currently supported. Takes precendence over derby.stream.error.file. Takes precendence over derby.stream.error.method. Takes precendence over derby.stream.error.field- See Also:
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ERRORLOG_FILE_PROPERTY
derby.stream.error.file=absolute or relative error log filename Takes precendence over derby.stream.error.method. Takes precendence over derby.stream.error.field- See Also:
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ERRORLOG_METHOD_PROPERTY
derby.stream.error.method=. returning an OutputStream or Writer object Takes precendence over derby.stream.error.field - See Also:
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ERRORLOG_FIELD_PROPERTY
derby.stream.error.field= className.fieldName returning an OutputStream or Writer object- See Also:
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ERRORLOG_ROLLINGFILE_PATTERN_PROPERTY
derby.stream.error.rollingfile.pattern=the pattern A pattern consists of a string that includes the following special components that will be replaced at runtime:- "/" the local pathname separator
- "%t" the system temporary directory
- "%h" the value of the "user.home" system property
- "%d" the value of the "derby.system.home" system property
- "%g" the generation number to distinguish rotated logs
- "%u" a unique number to resolve conflicts
- "%%" translates to a single percent sign "%"
Thus for example a pattern of "%t/java%g.log" with a count of 2 would typically cause files to be written on Solaris to /var/tmp/java0.log and /var/tmp/java1.log whereas on Windows 95 they would be typically written to C:\TEMP\java0.log and C:\TEMP\java1.log
Generation numbers follow the sequence 0, 1, 2, etc.
Normally the "%u" unique field is set to 0. However, if the FileHandler tries to open the filename and finds the file is currently in use by another process it will increment the unique number field and try again. This will be repeated until FileHandler finds a file name that is not currently in use. If there is a conflict and no "%u" field has been specified, it will be added at the end of the filename after a dot. (This will be after any automatically added generation number.)
Thus if three processes were all trying to output to fred%u.%g.txt then they might end up using fred0.0.txt, fred1.0.txt, fred2.0.txt as the first file in their rotating sequences.
Note that the use of unique ids to avoid conflicts is only guaranteed to work reliably when using a local disk file system.
The default pattern is "%d/derby-%g.log"
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ERRORLOG_ROLLINGFILE_LIMIT_PROPERTY
derby.stream.error.rollingfile.limit=the rolling file size limitThe default limit is 1024000
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ERRORLOG_ROLLINGFILE_COUNT_PROPERTY
derby.stream.error.rollingfile.count=the rolling file countThe default count is 10
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LOG_FILE_APPEND
derby.infolog.append={true,false}
If the info stream goes to a file and the file already exist, it can either delete the existing file or append to it. User can specifiy whether info log file should append or not by setting derby.infolog.append={true/false} The default behavior is that the exiting file will be deleted when a new info stream is started.- See Also:
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SYSTEM_HOME_PROPERTY
derby.system.home
Property name for the home directory. Any relative path in the system should be accessed though this property- See Also:
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BOOT_ALL
derby.system.bootAll
Automatically boot any services at start up time. When set to true this services will be booted at startup, otherwise services will be booted on demand.- See Also:
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NO_AUTO_BOOT
derby.database.noAutoBoot
Don't automatically boot this service at start up time. When set to true this service will only be booted on demand, otherwise the service will be booted at startup time if possible.- See Also:
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DELETE_ON_CREATE
derby.__deleteOnCreate
Before creating this service delete any remenants (e.g. the directory) of a previous service at the same location.INTERNAL USE ONLY
- See Also:
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FORCE_DATABASE_LOCK
derby.database.forceDatabaseLock
Derby attempts to prevent two instances of Derby from booting the same database with the use of a file called db.lck inside the database directory. On some platforms, Derby can successfully prevent a second instance of Derby from booting the database, and thus prevents corruption. If this is the case, you will see an SQLException like the following: ERROR XJ040: Failed to start database 'toursDB', see the next exception for details. ERROR XSDB6: Another instance of Derby may have already booted the database C:\databases\toursDB. The error is also written to the information log. On other platforms, Derby issues a warning message if an instance of Derby attempts to boot a database that may already have a running instance of Derby attached to it. However, it does not prevent the second instance from booting, and thus potentially corrupting, the database. If a warning message has been issued, corruption may already have occurred. The warning message looks like this: WARNING: Derby (instance 80000000-00d2-3265-de92-000a0a0a0200) is attempting to boot the database /export/home/sky/wombat even though Derby (instance 80000000-00d2-3265-8abf-000a0a0a0200) may still be active. Only one instance of Derby should boot a database at a time. Severe and non-recoverable corruption can result and may have already occurred. The warning is also written to the information log. This warning is primarily a Technical Support aid to determine the cause of corruption. However, if you see this warning, your best choice is to close the connection and exit the JVM. This minimizes the risk of a corruption. Close all instances of Derby, then restart one instance of Derby and shut down the database properly so that the db.lck file can be removed. The warning message continues to appear until a proper shutdown of the Derby system can delete the db.lck file. If the "derby.database.forceDatabaseLock" property is set to true then this default behavior is altered on systems where Derby cannot prevent this dual booting. If the to true, then if the platform does not provide the ability for Derby to guarantee no double boot, and if Derby finds a db.lck file when it boots, it will throw an exception (TODO - mikem - add what exception), leave the db.lck file in place and not boot the system. At this point the system will not boot until the db.lck file is removed by hand. Note that this situation can arise even when 2 VM's are not accessing the same Derby system. Also note that if the db.lck file is removed by hand while a VM is still accessing a derby.database, then there is no way for Derby to prevent a second VM from starting up and possibly corrupting the database. In this situation no warning message will be logged to the error log. To disable the default behavior of the db.lck file set property as follows: derby.database.forceDatabaseLock=true- See Also:
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LOCKS_INTRO
- See Also:
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LOCKS_ESCALATION_THRESHOLD
derby.locks.escalationThreshold
The number of row locks on a table after which we escalate to table locking. Also used by the optimizer to decide when to start with table locking. The String value must be convertible to an int.- See Also:
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DEFAULT_LOCKS_ESCALATION_THRESHOLD
static final int DEFAULT_LOCKS_ESCALATION_THRESHOLDThe default value for LOCKS_ESCALATION_THRESHOLD- See Also:
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MIN_LOCKS_ESCALATION_THRESHOLD
static final int MIN_LOCKS_ESCALATION_THRESHOLDThe minimum value for LOCKS_ESCALATION_THRESHOLD- See Also:
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DEADLOCK_TIMEOUT
Configuration parameter for deadlock timeouts, set in seconds.- See Also:
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DEADLOCK_TIMEOUT_DEFAULT
static final int DEADLOCK_TIMEOUT_DEFAULTDefault value for deadlock timesouts (20 seconds)- See Also:
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WAIT_TIMEOUT_DEFAULT
static final int WAIT_TIMEOUT_DEFAULTDefault value for wait timeouts (60 seconds)- See Also:
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DEADLOCK_MONITOR
Turn on lock monitor to help debug deadlocks. Default value is OFF. With this property turned on, all deadlocks will cause a tracing to be output to the db2j.LOG file.
This property takes effect dynamically.- See Also:
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DEADLOCK_TRACE
Turn on deadlock trace to help debug deadlocks. Effect 1: This property only takes effect if DEADLOCK_MONITOR is turned ON for deadlock trace. With this property turned on, each lock object involved in a deadlock will output its stack trace to db2j.LOG. Effect 2: When a timeout occurs, a lockTable dump will also be output to db2j.LOG. This acts independent of DEADLOCK_MONITOR.
This property takes effect dynamically.- See Also:
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LOCKWAIT_TIMEOUT
Configuration parameter for lock wait timeouts, set in seconds.- See Also:
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DATABASE_CLASSPATH
derby.database.classpath
Consists of a series of two part jar names.- See Also:
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BOOT_DB_CLASSPATH
internal use only, passes the database classpathinto the class manager Undocumented.- See Also:
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DATABASE_PROPERTIES_ONLY
derby.database.propertiesOnly- See Also:
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DERBY_INSTALL_URL
This property is private to Derby. This property is forcibly set by the Network Server to override any values which the user may have set. This property is only used to parameterize the Basic security policy used by the Network Server. This property is the location of the derby jars.- See Also:
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DERBY_INSTALL_PATH
- See Also:
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DERBY_SECURITY_HOST
This property is private to Derby. This property is forcibly set by the Network Server to override any values which the user may have set. This property is only used to parameterize the Basic security policy used by the Network Server. This property is the hostname which the server uses.- See Also:
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DERBY_SECURITY_PORT
This property is private to Derby. This property is forcibly set by the Network Server to override any values which the user may have set. This property is only used to parameterize the Basic security policy used by the Network Server. This property is the port number which the server listens to.- See Also:
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CREATE_WITH_NO_LOG
Creation of an access factory should be done with no logging. This is a run-time property that should not make it to disk in the service.properties file.
Undocumented.
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PAGE_SIZE_PARAMETER
The page size to create a table or index with. Must be a multiple of 2k, usual choices are: 2k, 4k, 8k, 16k, 32k, 64k. The default if property is not set is 4k.- See Also:
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PAGE_SIZE_DEFAULT_LONG
The default page size to use for tables that contain a long column.- See Also:
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TBL_PAGE_SIZE_BUMP_THRESHOLD
static final int TBL_PAGE_SIZE_BUMP_THRESHOLDThe bump threshold for pages sizes for create tables If the approximate column sizes of a table is greater than this threshold, the page size for the tbl is bumped to PAGE_SIZE_DEFAULT_LONG provided the page size is not already specified as a property- See Also:
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IDX_PAGE_SIZE_BUMP_THRESHOLD
static final int IDX_PAGE_SIZE_BUMP_THRESHOLDThe bump threshold for pages size for index. If the approximate key columns of an index is greater than this threshold, the page size for the index is bumped to PAGE_SIZE_DEFAULT_LONG provided the page size is not already specified as a property- See Also:
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ROW_LOCKING
Derby supports Row Level Locking (rll), but you can use this property to disable rll. Applications which use rll will use more system resources, so if an application knows that it does not need rll then it can use this system property to force all locking in the system to lock at the table level. This property can be set to the boolean values "true" or "false". Setting the property to true is the same as not setting the property at all, and will result in rll being enabled. Setting the property to false disables rll.- See Also:
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PROPERTIES_CONGLOM_ID
derby.storage.propertiesId
Stores the id of the conglomerate that holds the per-database properties. Is stored in the service.properties file.INTERNAL USE ONLY
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STORAGE_TEMP_DIRECTORY
derby.storage.tempDirectory
Sets the temp directory for a database.- See Also:
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DURABILITY_PROPERTY
derby.system.durabilityCurrently the only valid supported case insensitive value is 'test' Note, if this property is set to any other value other than 'test', this property setting is ignored In the future, this property can be used to set different modes - for example a form of relaxed durability where database can recover to a consistent state, or to enable some kind of in-memory mode.
When set to 'test', the store system will not force sync calls in the following cases - for the log file at each commit - for the log file before data page is forced to disk - for page allocation when file is grown - for data writes during checkpoint That means - a commit no longer guarantees that the transaction's modification will survive a system crash or JVM termination - the database may not recover successfully upon restart - a near full disk at runtime may cause unexpected errors - database can be in an inconsistent stateThis setting is provided for performance reasons and should ideally only be used when the system can withstand the above consequences.
One sample use would be to use this mode (derby.system.durability=test) when using Derby as a test database, where high performance is required and the data is not very important
Valid supported values are test
Example derby.system.durability=test One can set this as a command line option to the JVM when starting the application or in the derby.properties file. It is a system level property.
This property is static; if you change it while Derby is running, the change does not take effect until you reboot.- See Also:
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DURABILITY_TESTMODE_NO_SYNC
This is a value supported for derby.system.durability When derby.system.durability=test, the storage system does not force syncs and the system may not recover. It is also possible that the database might be in an inconsistent state- See Also:
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FILESYNC_TRANSACTION_LOG
derby.storage.fileSyncTransactionLogWhen set, the store system will use sync() call on the log at commit instead of doing a write sync on all writes to the log; even if the write sync mode (rws) is supported in the JVM.
Undocumented.
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LOG_ARCHIVE_MODE
derby.storage.logArchiveMode
used to identify whether the log is being archived for the database or not. It Is stored in the service.properties file. This property can be set to the boolean values "true" or "false". Setting the property to true means log is being archived, which could be used for roll-forward recovery. Setting the property to false disables log archive mode.INTERNAL USE ONLY
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LOG_DEVICE_AT_BACKUP
derby.storage.logDeviceWhenBackedUp
This property indicates the logDevice location(path) when the backup was taken, used to restore the log to the same location while restoring from backup.INTERNAL USE ONLY
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MODULE_PREFIX
derby.module.modulenameDefines a new module. Modulename is a name used when loading the definition of a module, it provides the linkage to other properties used to define the module, derby.env.jdk.modulename and derby.env.classes.modulename. The value is a Java class name that implements functionality required by the other parts of a Derby system or database. The class can optionally implement these classes to control its use and startup.
- org.apache.derby.iapi.services.monitor.ModuleControl
- org.apache.derby.iapi.services.monitor.ModuleSupportable
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SUB_SUB_PROTOCOL_PREFIX
derby.subSubProtocol.xxxA new subsubprotocol can be defined by specifying the class that handles storage for the subsubprotocol by implementing the
StorageFactory
orWritableStorageFactory
interface. This is done using a property named db2j.subsubprotocol.xxx where xxx is the subsubprotocol name. Subsubprotocol names are case sensitive and must be at least 3 characters in length.For instance:
derby.subSubProtocol.mem=com.mycompany.MemStore
defines the "mem" subsubprotocol with class com.mycompany.MemStore as its StorageFactory implementation. A database implemented using this subsubprotocol can be opened with the URL "jdbc:derby:mem:myDatabase".Subsubprotocols "directory", "classpath", "jar", "http", and "https" are built in and may not be overridden.
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MODULE_ENV_JDK_PREFIX
Declare a minimum JDK level the class for a module or sub sub protocol supports. Set to an integer value from the JVMInfo class to represent a JDK. If the JDK is running at a lower level than the class requires then the class will not be loaded and will not be used. If there are multiple modules classes implementing the same functionality and supported by the JVM, then the one with the highest JDK requirements will be selected. This functionality is not present for sub sub protocol classes yet. See org.apache.derby.iapi.services.info.JVMInfo.JDK_ID- See Also:
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MODULE_ENV_CLASSES_PREFIX
Declare a set of classes that the class for a module or sub sub protocol requires. Value is a comma separated list of classes. If the classes listed are not loadable by the virtual machine then the module class will not be loaded and will not be used.- See Also:
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LANG_TD_CACHE_SIZE
The size of the table descriptor cache used by the data dictionary. Database. Static.Undocumented.
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LANG_TD_CACHE_SIZE_DEFAULT
static final int LANG_TD_CACHE_SIZE_DEFAULT- See Also:
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LANG_PERMISSIONS_CACHE_SIZE
The size of the permissions cache used by the data dictionary. Database. Static.Undocumented.
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LANG_PERMISSIONS_CACHE_SIZE_DEFAULT
static final int LANG_PERMISSIONS_CACHE_SIZE_DEFAULT- See Also:
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LANG_SPS_CACHE_SIZE
The size of the stored prepared statment descriptor cache used by the data dictionary. Database. Static.
Externally visible but undocumented.
- See Also:
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LANG_SPS_CACHE_SIZE_DEFAULT
static final int LANG_SPS_CACHE_SIZE_DEFAULT- See Also:
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LANG_SEQGEN_CACHE_SIZE
The size of the sequence generator cache used by the data dictionary. Database. Static.Externally visible and documented.
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LANG_SEQGEN_CACHE_SIZE_DEFAULT
static final int LANG_SEQGEN_CACHE_SIZE_DEFAULT- See Also:
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LANG_SEQUENCE_PREALLOCATOR
Name of the implementation of SequencePreallocator which is used to tune how many values Derby pre-allocates for identity columns and sequences. Database. Static.Externally visible.
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LANGUAGE_STALE_PLAN_CHECK_INTERVAL
derby.language.stalePlanCheckIntervalThis property tells the number of times a prepared statement should be executed before checking whether its plan is stale. Database. Dynamic.
Externally visible but undocumented.
- See Also:
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DEFAULT_LANGUAGE_STALE_PLAN_CHECK_INTERVAL
static final int DEFAULT_LANGUAGE_STALE_PLAN_CHECK_INTERVALDefault value for above- See Also:
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MIN_LANGUAGE_STALE_PLAN_CHECK_INTERVAL
static final int MIN_LANGUAGE_STALE_PLAN_CHECK_INTERVALMinimum value for above- See Also:
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STATEMENT_CACHE_SIZE
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STATEMENT_CACHE_SIZE_DEFAULT
static final int STATEMENT_CACHE_SIZE_DEFAULT- See Also:
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STORAGE_AUTO_INDEX_STATS
Tells if automatic index statistics update is enabled (default is true).- See Also:
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STORAGE_AUTO_INDEX_STATS_LOGGING
Tells if activities related to automatic index statistics update should be written to the Derby system log file (derby.log).- See Also:
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STORAGE_AUTO_INDEX_STATS_TRACING
Tells if more detailed activities related to automatic index statistics update should be traced. Accepted values are: *off*, stdout, log, both- See Also:
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STORAGE_AUTO_INDEX_STATS_DEBUG_CREATE_THRESHOLD
Specifies the lower threshold for the number of rows in a table before creating statistics for the associated indexes.
NOTE: This is a debug property which will be removed or renamed.
Undocumented.
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STORAGE_AUTO_INDEX_STATS_DEBUG_CREATE_THRESHOLD_DEFAULT
static final int STORAGE_AUTO_INDEX_STATS_DEBUG_CREATE_THRESHOLD_DEFAULT- See Also:
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STORAGE_AUTO_INDEX_STATS_DEBUG_ABSDIFF_THRESHOLD
Specifies the lower threshold for the absolute difference between the row estimate for the table and the row estimate for the index before creating statistics for the associated indexes.
NOTE: This is a debug property which will be removed or renamed.
Undocumented.
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STORAGE_AUTO_INDEX_STATS_DEBUG_ABSDIFF_THRESHOLD_DEFAULT
static final int STORAGE_AUTO_INDEX_STATS_DEBUG_ABSDIFF_THRESHOLD_DEFAULT- See Also:
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STORAGE_AUTO_INDEX_STATS_DEBUG_LNDIFF_THRESHOLD
Specifies the lower threshold for the logarithmical (natural logarithm e) difference between the row estimate for the table and the row estimate for the index before creating statistics for the associated indexes.
NOTE: This is a debug property which will be removed or renamed.
Undocumented.
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STORAGE_AUTO_INDEX_STATS_DEBUG_LNDIFF_THRESHOLD_DEFAULT
static final double STORAGE_AUTO_INDEX_STATS_DEBUG_LNDIFF_THRESHOLD_DEFAULT- See Also:
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STORAGE_AUTO_INDEX_STATS_DEBUG_QUEUE_SIZE
Specifies the size of the work unit queue in the index statistics update daemon.
NOTE: This is a debug property which will be removed or renamed.
Undocumented.
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STORAGE_AUTO_INDEX_STATS_DEBUG_QUEUE_SIZE_DEFAULT
static final int STORAGE_AUTO_INDEX_STATS_DEBUG_QUEUE_SIZE_DEFAULT- See Also:
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STORAGE_AUTO_INDEX_STATS_DEBUG_KEEP_DISPOSABLE_STATS
Specifies whether to revert to 10.8 behavior and keep disposable stats.
NOTE: This is a debug property which will be removed or renamed.
Undocumented.
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PROP_XA_TRANSACTION_TIMEOUT
The property name used to get the default value for XA transaction timeout in seconds. Zero means no timout.- See Also:
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DEFAULT_XA_TRANSACTION_TIMEOUT
static final int DEFAULT_XA_TRANSACTION_TIMEOUTThe default value for XA transaction timeout if the corresponding property is not found in system properties. Zero means no timeout.- See Also:
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DEFAULT_USER_NAME
- See Also:
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DATABASE_MODULE
- See Also:
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SQL_AUTHORIZATION_PROPERTY
- See Also:
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DEFAULT_CONNECTION_MODE_PROPERTY
Default connection level authorization, set to one of NO_ACCESS, READ_ONLY_ACCESS or FULL_ACCESS. Defaults to FULL_ACCESS if not set.- See Also:
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NO_ACCESS
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READ_ONLY_ACCESS
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FULL_ACCESS
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READ_ONLY_ACCESS_USERS_PROPERTY
List of users with read-only connection level authorization.- See Also:
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FULL_ACCESS_USERS_PROPERTY
List of users with full access connection level authorization.- See Also:
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REQUIRE_AUTHENTICATION_PARAMETER
- See Also:
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AUTHENTICATION_PROVIDER_PARAMETER
- See Also:
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USER_PROPERTY_PREFIX
- See Also:
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AUTHENTICATION_PROVIDER_NATIVE
- See Also:
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AUTHENTICATION_PROVIDER_BUILTIN
- See Also:
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AUTHENTICATION_PROVIDER_LDAP
- See Also:
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AUTHENTICATION_SERVER_PARAMETER
- See Also:
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AUTHENTICATION_PROVIDER_LOCAL_SUFFIX
- See Also:
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AUTHENTICATION_PROVIDER_NATIVE_LOCAL
- See Also:
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AUTHENTICATION_NATIVE_PASSWORD_LIFETIME
- See Also:
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MILLISECONDS_IN_DAY
static final long MILLISECONDS_IN_DAY- See Also:
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AUTHENTICATION_NATIVE_PASSWORD_LIFETIME_DEFAULT
static final long AUTHENTICATION_NATIVE_PASSWORD_LIFETIME_DEFAULT- See Also:
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AUTHENTICATION_PASSWORD_EXPIRATION_THRESHOLD
- See Also:
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AUTHENTICATION_PASSWORD_EXPIRATION_THRESHOLD_DEFAULT
static final double AUTHENTICATION_PASSWORD_EXPIRATION_THRESHOLD_DEFAULT- See Also:
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AUTHENTICATION_BUILTIN_ALGORITHM
Property that specifies the name of the hash algorithm to use with the configurable hash authentication scheme.
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AUTHENTICATION_BUILTIN_ALGORITHM_DEFAULT
Default value for derby.authentication.builtin.algorithm when creating a new database.- See Also:
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AUTHENTICATION_BUILTIN_ALGORITHM_FALLBACK
Alternative default value for derby.authentication.builtin.algorithm ifAUTHENTICATION_BUILTIN_ALGORITHM_DEFAULT
is not available at database creation time.- See Also:
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AUTHENTICATION_BUILTIN_SALT_LENGTH
Property that specifies the number of bytes with random salt to use when hashing credentials using the configurable hash authentication scheme.
- See Also:
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AUTHENTICATION_BUILTIN_SALT_LENGTH_DEFAULT
static final int AUTHENTICATION_BUILTIN_SALT_LENGTH_DEFAULTThe default value for derby.authentication.builtin.saltLength.- See Also:
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AUTHENTICATION_BUILTIN_ITERATIONS
Property that specifies the number of times to apply the hash function in the configurable hash authentication scheme.
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AUTHENTICATION_BUILTIN_ITERATIONS_DEFAULT
static final int AUTHENTICATION_BUILTIN_ITERATIONS_DEFAULTDefault value for derby.authentication.builtin.iterations.- See Also:
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LOG_SWITCH_INTERVAL
Property name for specifying log switch interval Undocumented.- See Also:
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CHECKPOINT_INTERVAL
Property name for specifying checkpoint interval Undocumented.- See Also:
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LOG_BUFFER_SIZE
Property name for specifying log Buffer Size Undocumented.- See Also:
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REPLICATION_LOG_BUFFER_SIZE
Property name for specifying the size of the replication log buffers- See Also:
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REPLICATION_MIN_SHIPPING_INTERVAL
Property name for specifying the minimum log shipping interval- See Also:
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REPLICATION_MAX_SHIPPING_INTERVAL
Property name for specifying the maximum log shipping interval- See Also:
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REPLICATION_VERBOSE
Property name for specifying whether or not replication messages are written to the log- See Also:
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ALPHA_BETA_ALLOW_UPGRADE
Allow database upgrade during alpha/beta time. Only intended to be used to allow Derby developers to test their upgrade code. Only supported as a system/application (derby.properties) property.
Undocumented.
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IN_RESTORE_FROM_BACKUP
db2j.inRestore
This Property is used to indicate that we are in restore mode if if the system is doing a restore from backup. Used internally to set flags to indicate that service is not booted.INTERNAL USE ONLY
- See Also:
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DELETE_ROOT_ON_ERROR
db2j.deleteRootOnError
If we a new root is created while doing restore from backup, it should be deleted if a error occur before we could complete restore successfully.INTERNAL USE ONLY
- See Also:
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HTTP_DB_FILE_OFFSET
- See Also:
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HTTP_DB_FILE_LENGTH
- See Also:
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HTTP_DB_FILE_NAME
- See Also:
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START_DRDA
derby.drda.startNetworkServer
If true then we will attempt to start a DRDA network server when Derby boots, turning the current JVM into a server.
Default: false
- See Also:
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DRDA_PROP_LOGCONNECTIONS
derby.drda.logConnections
Indicates whether to log connections and disconnections.
Default: false
- See Also:
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DRDA_PROP_TRACEALL
derby.drda.traceAll
Turns tracing on for all sessions.
Default: falseDefault: false
- See Also:
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DRDA_PROP_TRACE
derby.drda.trace
- See Also:
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DRDA_PROP_TRACEDIRECTORY
derby.drda.traceDirectory
The directory used for network server tracing files.
Default: if the derby.system.home property has been set, it is the default. Otherwise, the default is the current directory.- See Also:
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DRDA_PROP_MINTHREADS
- See Also:
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DRDA_PROP_MAXTHREADS
- See Also:
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DRDA_PROP_TIMESLICE
- See Also:
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DRDA_PROP_SSL_MODE
derby.drda.sslMode
This property may be set to one of the following three values off: No Wire encryption basic: Encryption, but no SSL client authentication peerAuthentication: Encryption and with SSL client authentication- See Also:
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DRDA_PROP_SECURITYMECHANISM
derby.drda.securityMechanism
This property can be set to one of the following values USER_ONLY_SECURITY CLEAR_TEXT_PASSWORD_SECURITY ENCRYPTED_USER_AND_PASSWORD_SECURITY STRONG_PASSWORD_SUBSTITUTE_SECURITY
if derby.drda.securityMechanism is set to a valid mechanism, then the Network Server accepts only connections which use that security mechanism. No other types of connections are accepted.
if the derby.drda.securityMechanism is not set at all, then the Network Server accepts any connection which uses a valid security mechanism.
E.g derby.drda.securityMechanism=USER_ONLY_SECURITY This property is static. Server must be restarted for the property to take effect. Default value for this property is as though it is not set - in which case the server will allow clients with supported security mechanisms to connect- See Also:
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DRDA_PROP_PORTNUMBER
derby.drda.portNumber
The port number used by the network server.- See Also:
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DRDA_PROP_HOSTNAME
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DRDA_PROP_KEEPALIVE
derby.drda.keepAlive
client socket setKeepAlive value- See Also:
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DRDA_PROP_STREAMOUTBUFFERSIZE
derby.drda.streamOutBufferSize size of buffer used when stream out for client.- See Also:
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SERVICE_PROTOCOL
- See Also:
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SERVICE_LOCALE
- See Also:
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COLLATION
- See Also:
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UCS_BASIC_COLLATION
- See Also:
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TERRITORY_BASED_COLLATION
- See Also:
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TERRITORY_BASED_PRIMARY_COLLATION
- See Also:
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TERRITORY_BASED_SECONDARY_COLLATION
- See Also:
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TERRITORY_BASED_TERTIARY_COLLATION
- See Also:
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TERRITORY_BASED_IDENTICAL_COLLATION
- See Also:
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COLLATION_NONE
- See Also:
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STORAGE_DATA_NOT_SYNCED_AT_CHECKPOINT
db2j.storage.dataNotSyncedAtCheckPointWhen set, the store system will not force a sync() call on the containers during a checkpoint.
An internal debug system only flag. The recovery system will not work properly if this flag is enabled, it is provided to do performance debugging to see whether the system is I/O bound based on checkpoint synchronous I/O.
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STORAGE_DATA_NOT_SYNCED_AT_ALLOCATION
db2j.storage.dataNotSyncedAtAllocationWhen set, the store system will not force a sync() call on the containers when pages are allocated.
An internal debug system only flag. The recovery system will not work properly if this flag is enabled, it is provided to do performance debugging to see whether the system is I/O bound based on page allocation synchronous I/O.
- See Also:
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STORAGE_LOG_NOT_SYNCED
db2j.storage.logNotSyncedWhen set, the store system will not force a sync() call on the log at commit.
An internal debug system only flag. The recovery system will not work properly if this flag is enabled, it is provided to do performance debugging to see whether the system is I/O bound based on log file synchronous I/O.
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STORAGE_USE_DEFAULT_FILE_PERMISSIONS
derby.storage.useDefaultFilePermissions = {false,true}
When set to true, the store system will not limit file permissions of files created by Derby to owner, but rely on the current OS default. On Unix, this is determined by
umask(1)
. Only relevant for JVM >= 6.The default value is
true
on embedded, butfalse
on the Network server if started from command line, otherwise it is true for the server, too (i.e. started via API).- See Also:
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SERVER_STARTED_FROM_CMD_LINE
Internal. True if the network server was started from the command line (not from API). Used to determine whether to narrow file permissions iffderby.storage.useDefaultFilePermissions
isn't specified. INTERNAL USE ONLY- See Also:
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