| From: | "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com> |
|---|---|
| To: | Alex Deucher <alexdeucher(at)gmail(dot)com> |
| Cc: | Jeff Frost <jeff(at)frostconsultingllc(dot)com>, pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: strange performance regression between 7.4 and 8.1 |
| Date: | 2007-03-02 01:46:56 |
| Message-ID: | 45E78210.9030401@commandprompt.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | 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
>
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