| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | "Phoenix Kiula" <phoenix(dot)kiula(at)gmail(dot)com> |
| Cc: | "Richard Broersma Jr" <rabroersma(at)yahoo(dot)com>, "Alban Hertroys" <alban(at)magproductions(dot)nl>, "Postgres General" <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: Statistics collection question |
| Date: | 2007-09-03 19:38:20 |
| Message-ID: | 24631.1188848300@sss.pgh.pa.us |
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| Lists: | pgsql-general |
"Phoenix Kiula" <phoenix(dot)kiula(at)gmail(dot)com> writes:
> On 04/09/07, Richard Broersma Jr <rabroersma(at)yahoo(dot)com> wrote:
>> Thats odd, I wonder why the EXPLAIN ANALYZE time id some much less that the logged select
>> statement times?
> Because the statement has been executed and is in the cache.
That answer is way too flippant. In particular it doesn't explain your
repeated 80sec queries --- you should have enough memory in that thing
to be caching a fair amount of your data.
I'm wondering about some transaction taking exclusive lock on the table
and sitting on it for a minute or so, and also about network problems
delaying transmission of data to the client.
regards, tom lane
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