Re: strange performance regression between 7.4 and 8.1 - Mailing list pgsql-performance

From Joshua D. Drake
Subject Re: strange performance regression between 7.4 and 8.1
Date
Msg-id 45E78210.9030401@commandprompt.com
Whole thread Raw
In response to Re: strange performance regression between 7.4 and 8.1  ("Alex Deucher" <alexdeucher@gmail.com>)
Responses Re: strange performance regression between 7.4 and 8.1
List pgsql-performance
\
>> Is the SAN being shared between the database servers and other
>> servers?  Maybe
>> it was just random timing that gave you the poor write performance on
>> the old
>> server which might be also yielding occassional poor performance on
>> the new
>> one.
>>
>
> The direct attached scsi discs on the old database server we getting
> 45MBps not the SAN.  The SAN got 62/145Mbps, which is not as bad.

How many spindles you got in that SAN?

 We
> have 4 servers on the SAN each with it's own 4 GBps FC link via an FC
> switch.  I'll try and re-run the numbers when the servers are idle
> this weekend.
>
> Alex
>


--

      === The PostgreSQL Company: Command Prompt, Inc. ===
Sales/Support: +1.503.667.4564 || 24x7/Emergency: +1.800.492.2240
Providing the most comprehensive  PostgreSQL solutions since 1997
             http://www.commandprompt.com/

Donate to the PostgreSQL Project: http://www.postgresql.org/about/donate
PostgreSQL Replication: http://www.commandprompt.com/products/


pgsql-performance by date:

Previous
From: "Alex Deucher"
Date:
Subject: Re: strange performance regression between 7.4 and 8.1
Next
From: "Alex Deucher"
Date:
Subject: Re: strange performance regression between 7.4 and 8.1