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Optimise btree delete processing when no active backends.

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Clarify comments, downgrade a message to DEBUG and remove some
debug counters. Direct from ideas by Heikki Linnakangas.
This commit is contained in:
Simon Riggs
2010-04-22 08:04:25 +00:00
parent 781ec6b75d
commit a2555571fb
3 changed files with 22 additions and 23 deletions
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6
src/backend/storage/ipc/standby.c
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@ -11,7 +11,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/storage/ipc/standby.c,v 1.17 2010/04/21 19:08:14 sriggs Exp $
* $PostgreSQL: pgsql/src/backend/storage/ipc/standby.c,v 1.18 2010/04/22 08:04:25 sriggs Exp $
*
*-------------------------------------------------------------------------
*/
@ -248,7 +248,7 @@ ResolveRecoveryConflictWithSnapshot(TransactionId latestRemovedXid, RelFileNode
/*
* If we get passed InvalidTransactionId then we are a little surprised,
* but it is theoretically possible, so spit out a LOG message, but not
* but it is theoretically possible, so spit out a DEBUG1 message, but not
* one that needs translating.
*
* We grab latestCompletedXid instead because this is the very latest
@ -256,7 +256,7 @@ ResolveRecoveryConflictWithSnapshot(TransactionId latestRemovedXid, RelFileNode
*/
if (!TransactionIdIsValid(latestRemovedXid))
{
elog(LOG, "Invalid latestRemovedXid reported, using latestCompletedXid instead");
elog(DEBUG1, "Invalid latestremovexXid reported, using latestcompletedxid instead");
LWLockAcquire(ProcArrayLock, LW_SHARED);
latestRemovedXid = ShmemVariableCache->latestCompletedXid;