From: Glenn Sullivan <glenn.sullivan@varianinc.com>
To: pgsql-performance@postgresql.org
Subject: SELECT performance problem
Date: Tue, 20 Feb 2007 16:21:52 -0700
Message-ID: <45DB8290.1020501@varianinc.com> (raw)
I am updating from 7.4.5 to 8.2.3. I have noticed a significant
slowdown in simple searches such as
"select filename from vnmr_data where seqfil = 'sems';"
This returns 12 rows out of 1 million items in the table.
On 7.4.5, this takes about 1.5 seconds. On 8.2.3, it is taking
about 9 seconds.
I have played with different values of:
work_mem, temp_buffers, shared_buffers and effective_cache_size
and none of them make any difference.
I am running on redhat Linux 4 64bit.
Any ideas?
Glenn
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To: pgsql-performance@postgresql.org
Cc: glenn.sullivan@varianinc.com
Subject: Re: SELECT performance problem
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