Re: Postgresql.conf Settings - Mailing list pgsql-performance

From smiley2211
Subject Re: Postgresql.conf Settings
Date
Msg-id 13576252.post@talk.nabble.com
Whole thread Raw
In response to Re: Postgresql.conf Settings  ("Scott Marlowe" <scott.marlowe@gmail.com>)
List pgsql-performance
Scott,

Thanks for responding...I've posted all that information before and tried
all the suggestions but the query is still taking over 1 hour to complete
:(...I just wanted to possible hear what others have say 'effective cache',
'shared_buffers' etc set to...

Thanks...Marsha


Scott Marlowe-2 wrote:
>
> On 11/4/07, smiley2211 <smiley2211@yahoo.com> wrote:
>>
>> Hello all,
>>
>> What are the ideal settings for values in this postgresql.conf file???  I
>> have tried so many parameter changes but I still can not get the 8.1.4
>> version to perform as well as the 7.x version...what do others have their
>> postgrsql.conf file values set to???
>
> Without knowing what query you're trying to run it's hard to say.
>
> Can you post the explain analyze output for the query in both 7.x and 8.1?
>
>> Are there any known performance degrades going from 7.x to 8.1
>> versions???
>
> The only one I know of is if you try to do something like:
>
> select * from table1 t1 left join table2 t2 on (t1.id=t2.id) where t2.id
> is null
>
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>
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