Re: autovacuum ignore tables

From: "Sriram Dandapani" <sdandapani(at)counterpane(dot)com>
To: "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: <pgsql-admin(at)postgresql(dot)org>
Subject: Re: autovacuum ignore tables
Date: 2006-09-19 00:15:40
Message-ID: 6992E470F12A444BB787B5C937B9D4DF05DF1B82@ca-mail1.cis.local
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I have a high traffic table which is populated by a trigger on another
table. This high traffic table is partitioned by day. When I issue a
drop table on a child table..it goes into a wait state AND puts all jdbc
inserts in a wait state.(in short..a deadlock). I can repeat this use
case any time.

The only way to guarantee all drops to work is to briefly shutdown ,
modify pg_hba.conf to disallow client access, restart and issue the drop
commands (followed by restoration of original pg_hba.conf)

-----Original Message-----
From: Tom Lane [mailto:tgl(at)sss(dot)pgh(dot)pa(dot)us]
Sent: Monday, September 18, 2006 1:32 PM
To: Sriram Dandapani
Cc: pgsql-admin(at)postgresql(dot)org
Subject: Re: [ADMIN] autovacuum ignore tables

"Sriram Dandapani" <sdandapani(at)counterpane(dot)com> writes:
> I am trying to get autovacuum to complete quicker and prevent Xactn
> wraparound (currently, it takes very long and due to the fact that I
> have to restart the database for maintenance purposes), autovacuum
never
> finishes.)

Why are you restarting the database? There is no "maintenance purpose"
I'm aware of that requires routine postmaster restarts.

As for suppressing autovac on specific tables, see the pg_autovacuum
system catalog.

regards, tom lane

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