From: | "Magnus Hagander" <mha(at)sollentuna(dot)net> |
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To: | "PostgreSQL-patches" <pgsql-patches(at)postgresql(dot)org> |
Subject: | pgstat: delayed write of stats file |
Date: | 2006-04-05 13:40:38 |
Message-ID: | 6BCB9D8A16AC4241919521715F4D8BCEA3524E@algol.sollentuna.se |
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Lists: | pgsql-patches |
Per some earlier discussion, here is an attempt at implementing a
"delayed write" of the pgstats file, to decrease the write activity on
that file.
It changes so the file is only written once every 5 minutes (changeable
of course, I just picked something) instead of once every half second.
It's still written when the stats collector shuts down, just as before.
And it is now also written on backend request. A backend requests a
rewrite by simply sending a special stats message. It operates on the
assumption that the backends aren't actually going to read the
statistics file very often, compared to how frequent it's written today.
//Magnus
Attachment | Content-Type | Size |
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pgstat_delay.patch | application/octet-stream | 8.7 KB |
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