Обсуждение: Buffer miss ratio

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Buffer miss ratio

От
"崔岩ccuiyyan@sina.com"
Дата:
Dear all:<br /><br />     A quick question about shared buffers in PostgreSQL: <br />     <br />     I want to get the
numberof misses for the buffer pool of PostgreSQL. Is there any methods or <br />     <br />     performance tools I
canuse to get the information?  <br /><br /><br /><br /><br /><br /><br
/>                                                                          <br
/>                                                                          <br />       
                                                                  Best Wishes<br /><br
/>                                                                                yyan<br />

Re: Buffer miss ratio

От
Heikki Linnakangas
Дата:
崔岩ccuiyyan@sina.com wrote:
>      I want to get the number of misses for the buffer pool of PostgreSQL.
> Is there any methods or
> 
>      performance tools I can use to get the information?

Yes. Please see the manual chapters on "Monitoring database activity". 
The pgstatio_* views in particular.

PS. This mailing list is for discussion on development of PostgreSQL. 
Questions on usage belong to pgsql-general, or one of the other user 
mailing lists.

--   Heikki Linnakangas  EnterpriseDB   http://www.enterprisedb.com