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Fix an issue in recent walwriter hibernation patch.

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Users of asynchronous-commit mode expect there to be a guaranteed maximum
delay before an async commit's WAL records get flushed to disk.  The
original version of the walwriter hibernation patch broke that.  Add an
extra shared-memory flag to allow async commits to kick the walwriter out
of hibernation mode, without adding any noticeable overhead in cases where
no action is needed.
This commit is contained in:
Tom Lane
2012-05-08 23:05:58 -04:00
parent 8b77e226fb
commit acd4c7d58b
3 changed files with 60 additions and 7 deletions
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src/include/access/xlog.h
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@ -316,6 +316,7 @@ extern TimeLineID GetRecoveryTargetTLI(void);
extern bool CheckPromoteSignal(void);
extern void WakeupRecovery(void);
extern void SetWalWriterSleeping(bool sleeping);
/*
* Starting/stopping a base backup