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Fix C comment typo and redundant test

This commit is contained in:
Kevin Grittner 2016-04-25 15:42:29 -05:00
parent 6b1a213bbd
commit e65953be4f
1 changed files with 3 additions and 4 deletions
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7
src/backend/utils/time/snapmgr.c
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@ -1659,7 +1659,7 @@ TransactionIdLimitedForOldSnapshots(TransactionId recentXmin,
* This is not an assertion because we avoid the spinlock for
* performance, leaving open the possibility that xlimit could advance
* and be more current; but it seems prudent to apply this limit. It
* might make pruning a tiny bit less agressive than it could be, but
* might make pruning a tiny bit less aggressive than it could be, but
* protects against data loss bugs.
*/
if (TransactionIdIsNormal(latest_xmin)
@ -1681,9 +1681,8 @@ MaintainOldSnapshotTimeMapping(int64 whenTaken, TransactionId xmin)
{
int64 ts;
/* Fast exit when old_snapshot_threshold is not used. */
if (old_snapshot_threshold < 0)
return;
/* Never call this function when old snapshot checking is disabled. */
Assert(old_snapshot_threshold >= 0);
/* Keep track of the latest xmin seen by any process. */
SpinLockAcquire(&oldSnapshotControl->mutex_latest_xmin);