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| author | Fujii Masao <fujii@postgresql.org> | 2016-03-06 02:29:04 +0900 |
|---|---|---|
| committer | Fujii Masao <fujii@postgresql.org> | 2016-03-06 02:29:04 +0900 |
| commit | d34794f7d5566effd342dd0ebaca3de3b48656f0 (patch) | |
| tree | f804e0cd261b3b6b835be1fa0153f00ce63b7f76 /src/backend/access/transam/xlog.c | |
| parent | 60690a6fe8351995b1eeb9a53f2b634c3bce3a3d (diff) | |
| download | postgresql-d34794f7d5566effd342dd0ebaca3de3b48656f0.tar.gz postgresql-d34794f7d5566effd342dd0ebaca3de3b48656f0.zip | |
Ignore recovery_min_apply_delay until recovery has reached consistent state
Previously recovery_min_apply_delay was applied even before recovery
had reached consistency. This could cause us to wait a long time
unexpectedly for read-only connections to be allowed. It's problematic
because the standby was useless during that wait time.
This patch changes recovery_min_apply_delay so that it's applied once
the database has reached the consistent state. That is, even if the delay
is set, the standby tries to replay WAL records as fast as possible until
it has reached consistency.
Author: Michael Paquier
Reviewed-By: Julien Rouhaud
Reported-By: Greg Clough
Backpatch: 9.4, where recovery_min_apply_delay was added
Bug: #13770
Discussion: http://www.postgresql.org/message-id/20151111155006.2644.84564@wrigleys.postgresql.org
Diffstat (limited to 'src/backend/access/transam/xlog.c')
| -rw-r--r-- | src/backend/access/transam/xlog.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/backend/access/transam/xlog.c b/src/backend/access/transam/xlog.c index 94b79ac49d5..00f139a0f38 100644 --- a/src/backend/access/transam/xlog.c +++ b/src/backend/access/transam/xlog.c @@ -5715,6 +5715,10 @@ recoveryApplyDelay(XLogReaderState *record) if (recovery_min_apply_delay <= 0) return false; + /* no delay is applied on a database not yet consistent */ + if (!reachedConsistency) + return false; + /* * Is it a COMMIT record? * |