Message-ID: <4C6C4929.4030800@agliodbs.com>
Date: Wed, 18 Aug 2010 13:57:13 -0700
From: Josh Berkus <josh@agliodbs.com>
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To: Tom Lane <tgl@sss.pgh.pa.us>
CC: PostgreSQL-development <pgsql-hackers@postgresql.org>
Subject: Re: Return of the Solaris vacuum polling problem -- anyone
	remember this?
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> Tested that.  It does look like if I increase vacuum_cost_limit to 10000
> and lower vacuum_cost_page_dirty to 10, it reads 5-7 pages and writes
> 2-3 before each pollsys.  The math seems completely wrong on that,
> though -- it should be 50 and 30 pages, or similar.  If I can, I'll test
> a vacuum without cost_delay and make sure the pollsys() are connected to
> the cost delay and not something else.

Hmmm.  Looks like, at least in 8.3, running a manual vacuum on a table
doesn't prevent anti-wraparound vacuum from restarting.   So I can't do
any further testing until we can restart the server.

-- 
                                  -- Josh Berkus
                                     PostgreSQL Experts Inc.
                                     http://www.pgexperts.com