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,...
Allows global access synchronization to the AW$ table (analytical workplace tables used in OLAP option) enq: AW - AW generation lock Gives in-use generation state for a particular workspace enq: AW - user access for AW Synchronizes user accesses to a particular workspace enq: AW - AW state...
enq: CT - readingLock held to ensure that change tracking data remains in existence until a reader is done with it enq: CT - CTWR process start/stopLock held to ensure that only one CTWR process is started in a single instance enq: CT - state change gate 1Lock held while enabling or ...
Lock held to prevent file from accessing while reusing circular record enq: RS - prevent file delete Lock held to prevent deleting file to reclaim space enq: RT - contention Thread locks held by LGWR, DBW0, and RVWR (Recovery Writer, used in Flashback Database operations) to indicate mo...
Lock held to prevent file from accessing while reusing circular record enq: RS - prevent file delete Lock held to prevent deleting file to reclaim space enq: RT - contention Thread locks held by LGWR, DBW0, and RVWR (Recovery Writer, used in Flashback Database operations) to indicate mo...
INDX NUMBER INST_ID NUMBER KSQSTTYP VARCHAR2(2) KSQSTREQ NUMBER KSQSTWAT NUMBER KSQSTSGT NUMBER KSQSTFGT NUMBER KSQSTWTM NUMBER KSQSTRSN VARCHAR2(64) KSQSTEXPL VARCHAR2(4000) KSQSTEVIDX NUMBER SQL> select * from v$version; BANNER ...
The Stack's functionality is described as "First in - last out", the first element that enters the stack is the last to be popped out of it. A Queue has two main operations as well: Enqueue: Puts an element into the...
[转帖]一篇来自网络的关于“enqueue”events的简短参考,供自己和各位同学参考:EnqueueTypeDescriptionenq:AD-allocateAUSynchronizesaccessestoaspecificOSM(Or
enq: CT - CTWR process start/stopLock held to ensure that only one CTWR process is started in a single instance enq: CT - state change gate 1Lock held while enabling or disabling change tracking in RAC enq: CT - change stream ownershipLock held by one instance while change tracking is ...
WHERE S.RESOURCE_NAME IN ('enqueue_resources', 'enqueue_locks', 'dml_locks', 'processes', 'processes'); 排队锁使用单独的数组而不是排队资源数组来管理排队锁,通过查询x$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) ...