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Re: Major performance problem after upgrade from 8.3 to 8.4

From: Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>
To: Gerhard Wiesinger <lists(at)wiesinger(dot)com>
Cc: Andreas Kretschmer <akretschmer(at)spamfence(dot)net>, pgsql-performance(at)postgresql(dot)org
Subject: Re: Major performance problem after upgrade from 8.3 to 8.4
Date: 2010-08-30 08:17:27
Message-ID: AANLkTik14X_MYoZA5CHNGC8M7Rc0zXrRhoGw6FrfUPXm@mail.gmail.com (view raw or flat)
Thread:
Lists: pgsql-performance
2010/8/30 Gerhard Wiesinger <lists(at)wiesinger(dot)com>:
> On Mon, 30 Aug 2010, Pavel Stehule wrote:
>
>> Hello
>>
>> 2010/8/30 Andreas Kretschmer <akretschmer(at)spamfence(dot)net>:
>>>
>>> Gerhard Wiesinger <lists(at)wiesinger(dot)com> wrote:
>>>
>>>> I know that the data model is key/value pairs but it worked well in 8.3.
>>>> I need this flexibility.
>>>>
>>>> Any ideas?
>>>
>>> If i understand the query correctly it's a pivot-table, right?
>>>
>>
>> no - it's just EAV table on very large data :(
>
> Yes, it is an EAV table, but with query space comparable low (Max. 1 day out
> of years, typically 5mins out of years).
>

it is irelevant - there are repeated seq scans - so you need a
partitioning or classic table - maybe materialized views can help

Pavel


> Thnx.
>
> Ciao,
> Gerhard
>
> --
> http://www.wiesinger.com/
>
>

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