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...
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$version; BANNER ...
Lock held to prevent file from accessing while reusing circular record enq: RS - prevent file delete Lock held to prevent deleting file to reclaim space enq: RT - contention Thread locks held by LGWR, DBW0, and RVWR (Recovery Writer, used in Flashback Database operations) to indicate mo...
The Stack's functionality is described as "First in - last out", the first element that enters the stack is the last to be popped out of it. A Queue has two main operations as well: Enqueue: Puts an element into the...
[转帖]一篇来自网络的关于“enqueue”events的简短参考,供自己和各位同学参考:EnqueueTypeDescriptionenq:AD-allocateAUSynchronizesaccessestoaspecificOSM(Or
enq: CT - CTWR process start/stopLock held to ensure that only one CTWR process is started in a single instance enq: CT - state change gate 1Lock held while enabling or disabling change tracking in RAC enq: CT - change stream ownershipLock held by one instance while change tracking is ...
WHERE S.RESOURCE_NAME IN ('enqueue_resources', 'enqueue_locks', 'dml_locks', 'processes', 'processes'); 排队锁使用单独的数组而不是排队资源数组来管理排队锁,通过查询x$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) ...