Thread: SQL CPU time usage

SQL CPU time usage

From
Ruben Rubio Rey
Date:
Hi,

I have a web page, that executes several SQLs.

So, I would like to know witch one of those SQLs consumes more CPU.
For example,
I have SQL1 that is executed in 1.2 secs and a SQL2 that is executed in
200 ms.

But SQL2 is executed 25 times and SQL1 is executed 1 time, so really
SQL2 consumes more CPU time.

Is there any way to know this?
I have think that logging all SQLs and then cheking it is a way to do it
... any other idea?

Thanks in advance

Re: SQL CPU time usage

From
john_oshea@wordbank.com
Date:
On 17 May 2006, at 16:21, Ruben Rubio Rey wrote:

> I have a web page, that executes several SQLs.
>
> So, I would like to know witch one of those SQLs consumes more CPU.
> For example,
> I have SQL1 that is executed in 1.2 secs and a SQL2 that is
> executed in 200 ms.
>
> But SQL2 is executed 25 times and SQL1 is executed 1 time, so
> really SQL2 consumes more CPU time.
>
> Is there any way to know this?
> I have think that logging all SQLs and then cheking it is a way to
> do it ... any other idea?

Practical Query Analysis: <http://pqa.projects.postgresql.org/> does
exactly that (scan historic logs). Very nice indeed and more than
worth the money (it's BSD-licensed)

--
John O'Shea
Wordbank Limited
33 Charlotte Street, London W1T 1RR
Direct line: +44 (0) 20 7903 8829
Fax: +44 (0) 20 7903 8888
<http://www.wordbank.com/>



Re: SQL CPU time usage

From
Ruben Rubio Rey
Date:
john_oshea@wordbank.com wrote:

> On 17 May 2006, at 16:21, Ruben Rubio Rey wrote:
>
>> I have a web page, that executes several SQLs.
>>
>> So, I would like to know witch one of those SQLs consumes more CPU.
>> For example,
>> I have SQL1 that is executed in 1.2 secs and a SQL2 that is  executed
>> in 200 ms.
>>
>> But SQL2 is executed 25 times and SQL1 is executed 1 time, so  really
>> SQL2 consumes more CPU time.
>>
>> Is there any way to know this?
>> I have think that logging all SQLs and then cheking it is a way to
>> do it ... any other idea?
>
>
> Practical Query Analysis: <http://pqa.projects.postgresql.org/> does
> exactly that (scan historic logs). Very nice indeed and more than
> worth the money (it's BSD-licensed)
>
thanks

Re: SQL CPU time usage

From
"Ivan Zolotukhin"
Date:
You may also try PgFouine (http://pgfouine.projects.postgresql.org/)
for log analysis, I found it very useful in similar situation.


On 5/17/06, Ruben Rubio Rey <ruben@rentalia.com> wrote:
> Hi,
>
> I have a web page, that executes several SQLs.
>
> So, I would like to know witch one of those SQLs consumes more CPU.
> For example,
> I have SQL1 that is executed in 1.2 secs and a SQL2 that is executed in
> 200 ms.
>
> But SQL2 is executed 25 times and SQL1 is executed 1 time, so really
> SQL2 consumes more CPU time.
>
> Is there any way to know this?
> I have think that logging all SQLs and then cheking it is a way to do it
> ... any other idea?
>
> Thanks in advance
>
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