Re: Serious Performance Loss in 7.0.2??

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От Tim Perdue
Тема Re: Serious Performance Loss in 7.0.2??
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Msg-id 396C71C5.719DAF45@valinux.com
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Ответ на Serious Performance Loss in 7.0.2??  (Tim Perdue <tperdue@valinux.com>)
Ответы Re: Serious Performance Loss in 7.0.2??  (The Hermit Hacker <scrappy@hub.org>)
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Andrew McMillan wrote:
> PostgreSQL seems to not get the index choice right when you have index
> matches that are like =, =, =, DESC so you actually need to specify the
> ORDER BY clause in full like:
>         ORDER BY mail_list DESC, mail_year DESC, mail_month DESC, mail_date
> DESC
> and things will hopefully be all OK again.

Wow - that definitely does *not* work. That took 1:30 to return the
result for the linux-kernel list.

My server has a load of 19.25 right now - at 6 AM.

Tim

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