FROMV$RESOURCE_LIMIT S WHERES.RESOURCE_NAMEIN('enqueue_resources', 'enqueue_locks', 'dml_locks', 'processes', 'processes'); 排队锁使用单独的数组而不是排队资源数组来管理排队锁,通过查询x$ksqeq(内核服务排队对象)或v$enqueue_lock视图来看到这种结构。 v$equeue_lock视图(除TX和TM锁) SELECTS.ADDR,...
Coordinates plug-in operation of transportable tablespaces enq: PR - contention Synchronizes process startup enq: PS - contention Parallel Execution Server Process reservation and synchronization enq: PT - contention Synchronizes access to ASM PST metadata enq: PV - syncstart Synchronizes slave start_...
Synchronizes space management activities in dictionary-managed tablespaces enq: SU - contention Serializes access to SaveUndo Segment enq: SW - contention Coordinates the 'alter system suspend' operation enq: TA - contention Serializes operations on undo segments and undo tablespaces enq: TB - SQL Tu...
Synchronizes space management activities in dictionary-managed tablespaces enq: SU - contention Serializes access to SaveUndo Segment enq: SW - contention Coordinates the 'alter system suspend' operation enq: TA - contention Serializes operations on undo segments and undo tablespaces enq: TB - SQ...
enq: DR - contentionSerializes the active distributed recovery operation enq: DS - contentionPrevents a database suspend during LMON reconfiguration enq: DT - contentionSerializes changing the default temporary table space and user creation enq: DV - contentionSynchronizes access to lower-version Diana...
If mode is not 0, it is a convert operation. Wait time We are in a tight loop until acquisition is complete. Every loop we wait 0.5 seconds. Parameters name The name of the lock can be determined by looking at the 2 high order bytes of P1 or P1RAW. The name will always be 2 ...
Synchronizes space management activities in dictionary-managed tablespaces enq: SU - contention Serializes access to SaveUndo Segment enq: SW - contention Coordinates the 'alter system suspend' operation enq: TA - contention Serializes operations on undo segments and undo tablespaces enq: TB - SQ...
[转帖]一篇来自网络的关于“enqueue”events的简短参考,供自己和各位同学参考:EnqueueTypeDescriptionenq:AD-allocateAUSynchronizesaccessestoaspecificOSM(Or
enq: ST – contentionSynchronizes space management activities in dictionary-managed tablespaces enq: SU – contentionSerializes access to SaveUndo Segment enq: SW – contentionCoordinates the ‘alter system suspend’ operation enq: TA – contentionSerializes operations on undo segments and undo tablespaces...
enq: DR - contentionSerializes the active distributed recovery operation enq: DS - contentionPrevents a database suspend during LMON reconfiguration enq: DT - contentionSerializes changing the default temporary table space and user creation enq: DV - contentionSynchronizes access to lower-version Diana...