Re: how could select id=xx so slow?

From: Craig Ringer <ringerc(at)ringerc(dot)id(dot)au>
To: Yan Chunlu <springrider(at)gmail(dot)com>
Cc: Albe Laurenz <laurenz(dot)albe(at)wien(dot)gv(dot)at>, pgsql-performance(at)postgresql(dot)org
Subject: Re: how could select id=xx so slow?
Date: 2012-07-12 00:18:23
Message-ID: 4FFE17CF.1050601@ringerc.id.au
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On 07/11/2012 07:40 PM, Yan Chunlu wrote:
> could that because of my system is really busy?
> 1, postgresql always have 400+ connections(dozens of python process
> using client pool)
> 2, the query peak is 50+/s
> 3, I do have some bad performance sql executing periodically, need
> 100+ second to complete. could those bad performance sql influence
> others? because when I execute those simple sql directly, they was
> fast. but the slow query log shows it took too much time.
>
Oh, come on, these are the sorts of things you tell us /when you ask
your question/, not days later after lots of back-and-forth discussion.

--
Craig Ringer

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