Re: Vacuum Full is *hideously* slow!

From: "Phoenix Kiula" <phoenix(dot)kiula(at)gmail(dot)com>
To: "Scott Marlowe" <scott(dot)marlowe(at)gmail(dot)com>
Cc: "PG-General Mailing List" <pgsql-general(at)postgresql(dot)org>
Subject: Re: Vacuum Full is *hideously* slow!
Date: 2008-11-15 22:05:40
Message-ID: e373d31e0811151405m4513e6a0nc2b493d4847d4d54@mail.gmail.com
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Thanks Scott. Could be my I/O as I am on 15k Raptor SATA drives with
RAID 1 only.

Anyway, reindexing happened fast (12 minutes) and things are now humming along.

How long should cluster take on a db that's about 5.5GB in size? Is it
worth doing on a production db? The db is running fast now anyway, so
the only reason I am even thinking about this is because of the
results of a VACUUM ANALYZE, which give me this:

---
INFO: "links": found 5427 removable, 8876599 nonremovable row
versions in 483102 pages
DETAIL: 96 dead row versions cannot be removed yet.
There were 2135991 unused item pointers.
235 pages contain useful free space.
---

My semi-intelligent question: in the output above, that figure of
"483,102" pages. Should this in any way affect my setting for
max_fsm_pages variable in pg.conf?

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