| From: | Mario Weilguni <mweilguni(at)sime(dot)com> |
|---|---|
| To: | Kevin Grittner <Kevin(dot)Grittner(at)wicourts(dot)gov> |
| Cc: | pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: Experience with HP Smart Array P400 and SATA drives? |
| Date: | 2008-12-09 12:15:21 |
| Message-ID: | 493E6159.8040802@sime.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-performance |
Kevin Grittner schrieb:
>>>> Mario Weilguni <mweilguni(at)sime(dot)com> wrote:
>>>>
>> Has anyone benchmarked this controller (PCIe/4x, 512 MB BBC)? We try
>>
> to
>
>> use it with 8x SATA 1TB drives in RAID-5 mode under Linux, and
>>
> measure
>
>> strange values. An individual drive is capable of delivering 91
>>
> MB/sec
>
>> sequential read performance, and we get values ~102MB/sec out of a
>> 8-drive RAID5, seems to be ridiculous slow. Write performance seems
>>
> to
>
>> be much better, ~300 MB /sec - seems ok to me.
>>
>
> What's your stripe size?
>
> -Kevin
>
We used the default settings, it's 64k. Might a bigger value help here?
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