From: | "John Lister" <john(dot)lister-ps(at)kickstone(dot)com> |
---|---|
To: | "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | <pgsql-admin(at)postgresql(dot)org> |
Subject: | Re: Should autovacuum do a database wide vacuum near transaction limit? |
Date: | 2011-01-21 23:33:36 |
Message-ID: | A83ED098FF4346FFBA6AB8A2AA46A218@squarepi.com |
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Thread: | |
Lists: | pgsql-admin |
>> Hi, I'm running 8.3.9 on ubuntu with autovacuum enabled and seemingly
>> working properly., however I've started getting messages saying that I'm
>> near the transaction limit and I need to do a database wide vacuum, which
>> I've started.
>> From reading the docs, though I thought that autovacuum would do this on
>> my behalf, is this true?
>
> It's supposed to. Did you look around to see if AV was trying to do
> anything?
It still seems to be running occasionally vacuuming a table, according to
pg_stat_all_tables, it ran 1min ago
> It's possible you got bit by this recently-fixed bug, which caused any
> large-scale autovacuum operation to take unreasonably long to complete:
I'll have to pull in the latest versions, which unfortunately means stopping
the db, which I was trying to avoid.
On another bizarre note, A database wide vacuum has just finished, but I'm
still getting the warnings:
GMT WARNING: database "backend" must be vacuumed within 10205310
transactions
GMT HINT: To avoid a database shutdown, execute a full-database VACUUM in
"backend
I did vacuum verbose analyze which doesn't seem to have made a difference...
doing SELECT datname, age(datfrozenxid) FROM pg_database; reports that
backend has a transaction count near 2Billion but also so does template0
am I doing something wrong?
Cheers
John
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