From: | "Stephane Tessier" <stephane(dot)tessier(at)abovesecurity(dot)com> |
---|---|
To: | "'James Thornton'" <james(at)jamesthornton(dot)com> |
Cc: | "'Scott Marlowe'" <smarlowe(at)qwest(dot)net>, <markir(at)coretech(dot)co(dot)nz>, <pgsql-performance(at)postgresql(dot)org> |
Subject: | Re: my boss want to migrate to ORACLE |
Date: | 2004-08-02 21:30:52 |
Message-ID: | 004c01c478d7$fd8944f0$4e00020a@develavoie |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-performance |
oups,
i changed for RAID 10(strip and mirror)....
-----Original Message-----
From: James Thornton [mailto:james(at)jamesthornton(dot)com]
Sent: 2 aout, 2004 17:32
To: Stephane Tessier
Cc: 'Scott Marlowe'; markir(at)coretech(dot)co(dot)nz;
pgsql-performance(at)postgresql(dot)org
Subject: Re: [PERFORM] my boss want to migrate to ORACLE
Stephane Tessier wrote:
> I checked and we have a 128 megs battery backed cache on the raid
> controller...
>>we have space for more ram(we use 2 gigs on possibility of 3 gigs)
>>iowait is very high 98% --> look like postgresql wait for io access
>>raid5 -->raid0 if i'm right raid5 use 4 writes(parity,data, etc) for each
>>write on disk
>
> Just get battery backed cache on your RAID controller. RAID0 is way too
> unreliable for a production environment. One disk dies and all your
> data is just gone.
I'm the one who sent the e-mail about RAID 5's 4 writes, but I suggested
you look at RAID 10, not RAID 0.
--
James Thornton
______________________________________________________
Internet Business Consultant, http://jamesthornton.com
From | Date | Subject | |
---|---|---|---|
Next Message | James Thornton | 2004-08-02 21:32:19 | Re: my boss want to migrate to ORACLE |
Previous Message | Rod Taylor | 2004-08-02 21:26:16 | Re: Page Miss Hits |