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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2010-04-28 00:09:05 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2010-04-28 00:09:05 +0000 |
| commit | 2871b4618af1acc85665eec0912c48f8341504c4 (patch) | |
| tree | c8ff6ec3c15ae9bdfa6d2958b46b3b9533a3aec3 /src/backend/access/transam/twophase.c | |
| parent | 871e73bb276506ca591083f0b343951ba0db6989 (diff) | |
| download | postgresql-2871b4618af1acc85665eec0912c48f8341504c4.tar.gz | |
Replace the KnownAssignedXids hash table with a sorted-array data structure,
and be more tense about the locking requirements for it, to improve performance
in Hot Standby mode. In passing fix a few bugs and improve a number of
comments in the existing HS code.
Simon Riggs, with some editorialization by Tom
Diffstat (limited to 'src/backend/access/transam/twophase.c')
| -rw-r--r-- | src/backend/access/transam/twophase.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/backend/access/transam/twophase.c b/src/backend/access/transam/twophase.c index faafc7e5c1..02703226be 100644 --- a/src/backend/access/transam/twophase.c +++ b/src/backend/access/transam/twophase.c @@ -7,7 +7,7 @@ * Portions Copyright (c) 1994, Regents of the University of California * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/access/transam/twophase.c,v 1.60 2010/04/13 14:17:46 heikki Exp $ + * $PostgreSQL: pgsql/src/backend/access/transam/twophase.c,v 1.61 2010/04/28 00:09:05 tgl Exp $ * * NOTES * Each global transaction is associated with a global transaction @@ -1200,6 +1200,9 @@ StandbyTransactionIdIsPrepared(TransactionId xid) Assert(TransactionIdIsValid(xid)); + if (max_prepared_xacts <= 0) + return false; /* nothing to do */ + /* Read and validate file */ buf = ReadTwoPhaseFile(xid, false); if (buf == NULL) |