Re: sql-bench

From: Dave Cramer <pg(at)fastcrypt(dot)com>
To: yoav x <yoav112003(at)yahoo(dot)com>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: sql-bench
Date: 2006-09-13 14:03:12
Message-ID: B12A7F32-A989-40BE-973A-BC73F3E7A975@fastcrypt.com
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-performance

First of all you are going to have to show use what these queries are
exactly, what the machine is you are running on (CPU, memory, and
disk) , and how you have tuned it.

slow is a relative term.. we need information to determine what
"slow" means.

Dave
On 13-Sep-06, at 8:50 AM, yoav x wrote:

> So why are these queries so slow in PG?
>
>
> --- Dave Cramer <pg(at)fastcrypt(dot)com> wrote:
>
>> All of the tuning parameters would affect all queries
>>
>> shared buffers, wal buffers, effective cache, to name a few
>>
>> --dc--
>> On 13-Sep-06, at 8:24 AM, yoav x wrote:
>>
>>> Hi
>>>
>>> I am trying to run sql-bench against PostgreSQL 8.1.4 on Linux.
>>> Some of the insert tests seems to be ver slow
>>>
>>> For example: select_join_in
>>>
>>> Are there any tuning parameters that can be changed to speed these
>>> queries? Or are these queries
>>> especially tuned to show MySQL's stgrenths?
>>>
>>>
>>>
>>>
>>> __________________________________________________
>>> Do You Yahoo!?
>>> Tired of spam? Yahoo! Mail has the best spam protection around
>>> http://mail.yahoo.com
>>>
>>> ---------------------------(end of
>>> broadcast)---------------------------
>>> TIP 9: In versions below 8.0, the planner will ignore your desire to
>>> choose an index scan if your joining column's datatypes do
>>> not
>>> match
>>>
>>
>>
>> ---------------------------(end of
>> broadcast)---------------------------
>> TIP 1: if posting/reading through Usenet, please send an appropriate
>> subscribe-nomail command to majordomo(at)postgresql(dot)org so
>> that your
>> message can get through to the mailing list cleanly
>>
>
>
> __________________________________________________
> Do You Yahoo!?
> Tired of spam? Yahoo! Mail has the best spam protection around
> http://mail.yahoo.com
>
> ---------------------------(end of
> broadcast)---------------------------
> TIP 2: Don't 'kill -9' the postmaster
>

In response to

Browse pgsql-performance by date

  From Date Subject
Next Message Mark Lewis 2006-09-13 14:44:30 Re: sql-bench
Previous Message yoav x 2006-09-13 12:50:13 Re: sql-bench