Re: simple query runs 26 seconds

From: "Andrus" <kobruleht2(at)hot(dot)ee>
To: pgsql-general(at)postgresql(dot)org
Subject: Re: simple query runs 26 seconds
Date: 2007-08-27 10:33:56
Message-ID: fau9dc$26vv$1@news.hub.org
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> The time seems entirely spent in fetching rows from table "rid".
> Perhaps that table is bloated by lack of vacuuming --- can you
> show the output from "vacuum verbose rid"?

INFO: vacuuming "firma1.rid"
INFO: scanned index "rid_pkey" to remove 7375 row versions
DETAIL: CPU 0.01s/0.39u sec elapsed 5.46 sec.
INFO: scanned index "rid_dokumnr_idx" to remove 7375 row versions
DETAIL: CPU 0.04s/0.39u sec elapsed 2.42 sec.
INFO: scanned index "rid_toode_idx" to remove 7375 row versions
DETAIL: CPU 0.20s/0.43u sec elapsed 15.59 sec.
INFO: scanned index "rid_inpdokumnr_idx" to remove 7375 row versions
DETAIL: CPU 0.03s/0.32u sec elapsed 4.37 sec.
INFO: "rid": removed 7375 row versions in 2578 pages
DETAIL: CPU 0.32s/0.20u sec elapsed 87.93 sec.
INFO: index "rid_pkey" now contains 1517900 row versions in 4624 pages
DETAIL: 4210 index row versions were removed.
61 index pages have been deleted, 61 are currently reusable.
CPU 0.00s/0.00u sec elapsed 0.01 sec.
INFO: index "rid_dokumnr_idx" now contains 1517900 row versions in 4598
pages
DETAIL: 3219 index row versions were removed.
145 index pages have been deleted, 142 are currently reusable.
CPU 0.00s/0.00u sec elapsed 0.01 sec.
INFO: index "rid_toode_idx" now contains 1517900 row versions in 9950 pages
DETAIL: 7375 index row versions were removed.
245 index pages have been deleted, 232 are currently reusable.
CPU 0.00s/0.00u sec elapsed 0.00 sec.
INFO: index "rid_inpdokumnr_idx" now contains 1517900 row versions in 5257
pages
DETAIL: 7375 index row versions were removed.
319 index pages have been deleted, 311 are currently reusable.
CPU 0.00s/0.00u sec elapsed 0.00 sec.
INFO: "rid": found 7375 removable, 1517900 nonremovable row versions in
82560 pages
DETAIL: 0 dead row versions cannot be removed yet.
There were 292585 unused item pointers.
18375 pages contain useful free space.
0 pages are entirely empty.
CPU 1.98s/2.18u sec elapsed 157.82 sec.

Query returned successfully with no result in 158187 ms.

I installed Postgres using standard msi file.
postgresql.conf contains
autovacuum = on # enable autovacuum subprocess?

However, log files does not show any autovacuum messages.
So I expect that autovacuum in not running.

Any idea why autovacuum is not running ?

Andrus.

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