X-Original-To: pgsql-performance@postgresql.org Received: from localhost (developer.postgresql.org [64.117.224.193]) by developer.postgresql.org (Postfix) with ESMTP id BC736921BE0 for ; Fri, 30 May 2003 15:15:15 -0400 (EDT) Received: from developer.postgresql.org ([64.117.224.193]) by localhost (developer.postgresql.org [64.117.224.193:10024]) (amavisd-new) with ESMTP id 84242-03 for ; Fri, 30 May 2003 15:15:14 -0400 (EDT) Received: from isis.pcis.net (cr.pcis.net [207.18.226.3]) by developer.postgresql.org (Postfix) with ESMTP id 39CB8921B98 for ; Fri, 30 May 2003 15:15:14 -0400 (EDT) Received: from lyric.ofsloans.com (unverified [209.180.142.225]) by isis.pcis.net (Rockliffe SMTPRA 4.5.6) with ESMTP id ; Fri, 30 May 2003 14:15:12 -0500 Subject: Re: Hardware advice From: Will LaShell To: Andrew Sullivan Cc: pgsql-performance In-Reply-To: <20030530144430.GD17867@libertyrms.info> References: <20030530144430.GD17867@libertyrms.info> Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-FTHg+X4CjVgbqFsT5gSt" X-Mailer: Ximian Evolution 1.0.8 (1.0.8-10) Date: 30 May 2003 12:14:57 -0700 Message-Id: <1054322103.15469.8.camel@lyric.ofsloans.com> Mime-Version: 1.0 X-Virus-Scanned: by amavisd-new X-Archive-Number: 200305/288 X-Sequence-Number: 2067 --=-FTHg+X4CjVgbqFsT5gSt Content-Type: text/plain Content-Transfer-Encoding: quoted-printable On Fri, 2003-05-30 at 07:44, Andrew Sullivan wrote: > On Fri, May 30, 2003 at 03:23:28PM +0100, Adam Witney wrote: > > RAID5 for 3x 146Gb drives >=20 > I find the RAID5 on the PERC to be painfully slow. It's _really_ bad > if you don't put WAL on its own drive. This seems to be an issue with the dell firmware. The megaraid devel list has been tracking this issue on and off for some time now. People have had good luck with a couple of different fixes. The PERC cards -can- be made not to suck and the LSI cards simply don't have the problem. ( Since they are effectively the same card its the opinion that its the firmware ) > Also, you don't mention it, but check to make sure you're getting ECC > memory on these boxes. Random memory errors which go undetected will > make you very unhappy. ECC lowers (but doesn't eliminate, > apparently) your chances. 100% agree with this note. > A >=20 > --=20 > ---- > Andrew Sullivan 204-4141 Yonge Street > Liberty RMS Toronto, Ontario Canada > M2P 2A8 > +1 416 646 3304 x110 >=20 >=20 > ---------------------------(end of broadcast)--------------------------- > TIP 2: you can get off all lists at once with the unregister command > (send "unregister YourEmailAddressHere" to majordomo@postgresql.org) --=-FTHg+X4CjVgbqFsT5gSt Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.7 (GNU/Linux) iD8DBQA+162xZr3R5kgOZd0RAllLAJ93qxXFS2L1klz/lpBokaNFIlCY9ACeNOSu Hh171+G9yapGHSKQYW9VyPw= =2xsh -----END PGP SIGNATURE----- --=-FTHg+X4CjVgbqFsT5gSt--