From: | Jeff Frost <jeff(at)frostconsultingllc(dot)com> |
---|---|
To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | pgsql-performance(at)postgresql(dot)org |
Subject: | Re: Index usage problem on 8.3.3 |
Date: | 2008-10-31 02:47:25 |
Message-ID: | 490A71BD.7070303@frostconsultingllc.com |
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Lists: | pgsql-performance |
Tom Lane wrote:
> Jeff Frost <jeff(at)frostconsultingllc(dot)com> writes:
>
>> On Thu, 30 Oct 2008, Tom Lane wrote:
>>
>>>> Any idea why I don't see it on 8.3.4?
>>>>
>>> I think it's more likely some small difference in your test conditions
>>> than any real version-to-version difference. In particular I think the
>>> "still see" test might be influenced by the ages of transactions running
>>> concurrently.
>>>
>
>
>> Interesting. This is on a test server which has no other concurrent
>> transactions and it acts the same way after I stopped 8.3.4 and started up
>> 8.3.3 again as it did before stopping 8.3.3 to bring up 8.3.4. Hrmm..I'm not
>> sure that makes sense. So, I did the test with the sql script on 8.3.3, then
>> shut down 8.3.3, started up 8.3.4 on the same data dir, ran the test
>> successfully. Next I shut down 8.3.4 and started 8.3.3 and verified that the
>> behavior was still the same on 8.3.3. I wonder what else I might be doing
>> differently.
>>
>
> Huh. That does sound like it's a version-to-version difference.
> There's nothing in the CVS log that seems related though. Are you
> willing to post your test case?
>
>
It's a customer DB, so I'll contact them and see if we can boil it down
to a test case with no sensitive data.
--
Jeff Frost, Owner <jeff(at)frostconsultingllc(dot)com>
Frost Consulting, LLC http://www.frostconsultingllc.com/
Phone: 916-647-6411 FAX: 916-405-4032
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