derby.storage.rowLocking

Function

If set to true, enables row-level locking. When you disable row-level locking, you use table-level locking.

Row-level locking uses more system resources but allows greater concurrency, which works better in multi-user systems. Table-level locking works best with single-user applications or read-only applications.

If you use row-level locking (the default), the system decides whether to use table-level locking or row-level locking for each table in each DML statement. In certain situations, the system might choose to escalate the locking scheme from row-level locking to table-level locking to improve performance.

For more information about locking, see "Locking and performance" in Tuning Derby, and "Locking, concurrency, and isolation" in the Derby Developer's Guide.

Default

True.

Example

-- system-wide property
derby.storage.rowLocking=false
-- database-level property
CALL SYSCS_UTIL.SYSCS_SET_DATABASE_PROPERTY(
    'derby.storage.rowLocking', 'false')

Dynamic or static

This property is static; if you change it while Derby is running, the change does not take effect until you reboot.

Related reference
derby.authentication.builtin.algorithm
derby.authentication.builtin.iterations
derby.authentication.builtin.saltLength
derby.authentication.ldap.searchAuthDN
derby.authentication.ldap.searchAuthPW
derby.authentication.ldap.searchBase
derby.authentication.ldap.searchFilter
derby.authentication.native.passwordLifetimeMillis
derby.authentication.native.passwordLifetimeThreshold
derby.authentication.provider
derby.authentication.server
derby.connection.requireAuthentication
derby.database.classpath
derby.database.defaultConnectionMode
derby.database.forceDatabaseLock
derby.database.fullAccessUsers
derby.database.noAutoBoot
derby.database.propertiesOnly
derby.database.readOnlyAccessUsers
derby.database.sqlAuthorization
derby.infolog.append
derby.jdbc.xaTransactionTimeout
derby.language.logQueryPlan
derby.language.logStatementText
derby.language.sequence.preallocator
derby.language.statementCacheSize
derby.locks.deadlockTimeout
derby.locks.deadlockTrace
derby.locks.escalationThreshold
derby.locks.monitor
derby.locks.waitTimeout
derby.replication.logBufferSize
derby.replication.maxLogShippingInterval
derby.replication.minLogShippingInterval
derby.replication.verbose
derby.storage.indexStats.auto
derby.storage.indexStats.log
derby.storage.indexStats.trace
derby.storage.initialPages
derby.storage.minimumRecordSize
derby.storage.pageCacheSize
derby.storage.pageReservedSpace
derby.storage.pageSize
derby.storage.tempDirectory
derby.storage.useDefaultFilePermissions
derby.stream.error.extendedDiagSeverityLevel
derby.stream.error.field
derby.stream.error.file
derby.stream.error.logBootTrace
derby.stream.error.logSeverityLevel
derby.stream.error.method
derby.system.bootAll
derby.system.durability
derby.system.home
derby.user.UserName
DataDictionaryVersion