Re: understanding postgres issues/bottlenecks

Merlin Moncure wrote:
> On Thu, Jan 8, 2009 at 3:36 AM, Stefano Nichele
> <stefano.nichele@gmail.com> wrote:
>
>> Find !
>>
>> Dell CERC SATA RAID 2 PCI SATA 6ch
>>
>> Running lspci -v:
>>
>> 03:09.0 RAID bus controller: Adaptec AAC-RAID (rev 01)
>>         Subsystem: Dell CERC SATA RAID 2 PCI SATA 6ch (DellCorsair)
>>
>
> IIRC that's the 'perc 6ir' card...no write caching.  You are getting
> killed with syncs. If you can restart the database, you can test with
> fsync=off comparing load to confirm this.  (another way is to compare
> select only vs regular transactions on pgbench).
>
> merlin
>
>

I'll try next Saturday.

thanks
ste