January 2012
Intermediate to advanced
542 pages
11h 28m
English
Content preview from Oracle Database 11gR2 Performance Tuning CookbookBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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DBA_WAITERS
This view shows all the sessions waiting for a lock. It correlates a blocked transaction to the blocking one.
Fields
The most relevant view fields are as follows:
WAITING_SESSION: The ID of the waiting sessionHOLDING_SESSION: The ID of the session holding the lockLOCK_TYPE: The type of lockMODE_HELD: The locking mode heldMODE_REQUESTED: The locking mode requested
See also
- The
DBA_BLOCKERS,V$LOCK, andV$LOCKED_OBJECTsections in this appendix
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.