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> I enclose a short patch to reduce the PGARCH_RESTART_INTERVAL from 60

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> seconds to 10 seconds. The original number was plucked from thin air
> some months ago, and I'd like to review that now based upon further
> thought, observation and experience.
>
> This change has little or no effect on performance, since the interval
> is there mainly to avoid repeated respawn attempts if archiver fails at
> startup. Archiver start-up time is very quick, so there is little danger
> of exceeding 10 seconds.
>
> On a busy system, if the archiver does die, then many files can build up
> in the 60 seconds before respawning. That xlog file backlog could take
> some time to clear. This then leaves a larger than normal window of data
> loss for a possibly long period.
>
> It's a minor change only, with no other effect on function.

Simon Riggs
This commit is contained in:
Bruce Momjian 2004-12-02 22:40:18 +00:00
parent 4ea4f8bd06
commit 12e678201d
1 changed files with 2 additions and 2 deletions
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4
src/backend/postmaster/pgarch.c
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@ -19,7 +19,7 @@
* *
* *
* IDENTIFICATION * IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/postmaster/pgarch.c,v 1.12 2004/11/18 17:13:38 tgl Exp $ * $PostgreSQL: pgsql/src/backend/postmaster/pgarch.c,v 1.13 2004/12/02 22:40:18 momjian Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -51,7 +51,7 @@
#define PGARCH_AUTOWAKE_INTERVAL 60 /* How often to force a poll of #define PGARCH_AUTOWAKE_INTERVAL 60 /* How often to force a poll of
* the archive status directory; * the archive status directory;
* in seconds. */ * in seconds. */
#define PGARCH_RESTART_INTERVAL 60 /* How often to attempt to restart #define PGARCH_RESTART_INTERVAL 10 /* How often to attempt to restart
* a failed archiver; in seconds. */ * a failed archiver; in seconds. */
/* ---------- /* ----------