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Teach standby conflict resolution to use SIGUSR1

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Conflict reason is passed through directly to the backend, so we can
take decisions about the effect of the conflict based upon the local
state. No specific changes, as yet, though this prepares for later work.
CancelVirtualTransaction() sends signals while holding ProcArrayLock.
Introduce errdetail_abort() to give message detail explaining that the
abort was caused by conflict processing. Remove CONFLICT_MODE states
in favour of using PROCSIG_RECOVERY_CONFLICT states directly, for clarity.
This commit is contained in:
Simon Riggs
2010-01-16 10:05:59 +00:00
parent c9dc53be77
commit a8ce974cdd
11 changed files with 227 additions and 153 deletions
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4
src/backend/storage/lmgr/proc.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/storage/lmgr/proc.c,v 1.212 2010/01/15 09:19:03 heikki Exp $
* $PostgreSQL: pgsql/src/backend/storage/lmgr/proc.c,v 1.213 2010/01/16 10:05:50 sriggs Exp $
*
*-------------------------------------------------------------------------
*/
@ -324,7 +324,7 @@ InitProcess(void)
MyProc->waitProcLock = NULL;
for (i = 0; i < NUM_LOCK_PARTITIONS; i++)
SHMQueueInit(&(MyProc->myProcLocks[i]));
MyProc->recoveryConflictMode = 0;
MyProc->recoveryConflictPending = false;
/*
* We might be reusing a semaphore that belonged to a failed process. So