diff options
Diffstat (limited to 'src/backend/access/transam/varsup.c')
| -rw-r--r-- | src/backend/access/transam/varsup.c | 26 |
1 files changed, 13 insertions, 13 deletions
diff --git a/src/backend/access/transam/varsup.c b/src/backend/access/transam/varsup.c index 14332c6ab26..d7a5183d4cd 100644 --- a/src/backend/access/transam/varsup.c +++ b/src/backend/access/transam/varsup.c @@ -6,7 +6,7 @@ * Copyright (c) 2000-2007, PostgreSQL Global Development Group * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/access/transam/varsup.c,v 1.79 2007/09/08 20:31:14 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/access/transam/varsup.c,v 1.80 2007/11/15 21:14:32 momjian Exp $ * *------------------------------------------------------------------------- */ @@ -73,9 +73,9 @@ GetNewTransactionId(bool isSubXact) TransactionIdIsValid(ShmemVariableCache->xidVacLimit)) { /* - * To avoid swamping the postmaster with signals, we issue the - * autovac request only once per 64K transaction starts. This - * still gives plenty of chances before we get into real trouble. + * To avoid swamping the postmaster with signals, we issue the autovac + * request only once per 64K transaction starts. This still gives + * plenty of chances before we get into real trouble. */ if (IsUnderPostmaster && (xid % 65536) == 0) SendPostmasterSignal(PMSIGNAL_START_AUTOVAC_LAUNCHER); @@ -119,9 +119,9 @@ GetNewTransactionId(bool isSubXact) /* * We must store the new XID into the shared ProcArray before releasing - * XidGenLock. This ensures that every active XID older than - * latestCompletedXid is present in the ProcArray, which is essential - * for correct OldestXmin tracking; see src/backend/access/transam/README. + * XidGenLock. This ensures that every active XID older than + * latestCompletedXid is present in the ProcArray, which is essential for + * correct OldestXmin tracking; see src/backend/access/transam/README. * * XXX by storing xid into MyProc without acquiring ProcArrayLock, we are * relying on fetch/store of an xid to be atomic, else other backends @@ -249,18 +249,18 @@ SetTransactionIdLimit(TransactionId oldest_datfrozenxid, xidWarnLimit -= FirstNormalTransactionId; /* - * We'll start trying to force autovacuums when oldest_datfrozenxid - * gets to be more than autovacuum_freeze_max_age transactions old. + * We'll start trying to force autovacuums when oldest_datfrozenxid gets + * to be more than autovacuum_freeze_max_age transactions old. * - * Note: guc.c ensures that autovacuum_freeze_max_age is in a sane - * range, so that xidVacLimit will be well before xidWarnLimit. + * Note: guc.c ensures that autovacuum_freeze_max_age is in a sane range, + * so that xidVacLimit will be well before xidWarnLimit. * * Note: autovacuum_freeze_max_age is a PGC_POSTMASTER parameter so that * we don't have to worry about dealing with on-the-fly changes in its * value. It doesn't look practical to update shared state from a GUC * assign hook (too many processes would try to execute the hook, - * resulting in race conditions as well as crashes of those not - * connected to shared memory). Perhaps this can be improved someday. + * resulting in race conditions as well as crashes of those not connected + * to shared memory). Perhaps this can be improved someday. */ xidVacLimit = oldest_datfrozenxid + autovacuum_freeze_max_age; if (xidVacLimit < FirstNormalTransactionId) |