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Use a latch to make startup process wake up and replay immediately when

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new WAL arrives via streaming replication. This reduces the latency, and
also allows us to use a longer polling interval, which is good for energy
efficiency.

We still need to poll to check for the appearance of a trigger file, but
the interval is now 5 seconds (instead of 100ms), like when waiting for
a new WAL segment to appear in WAL archive.
This commit is contained in:
Heikki Linnakangas
2010-09-15 10:35:05 +00:00
parent 236b6bc29e
commit 723d0184e2
3 changed files with 53 additions and 8 deletions
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3
src/include/access/xlog.h
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@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/access/xlog.h,v 1.116 2010/08/12 23:24:54 rhaas Exp $
* $PostgreSQL: pgsql/src/include/access/xlog.h,v 1.117 2010/09/15 10:35:05 heikki Exp $
*/
#ifndef XLOG_H
#define XLOG_H
@ -303,5 +303,6 @@ extern TimeLineID GetRecoveryTargetTLI(void);
extern void HandleStartupProcInterrupts(void);
extern void StartupProcessMain(void);
extern void WakeupRecovery(void);
#endif /* XLOG_H */