From: Jignesh K. Shah <J.K.Shah@Sun.COM>
To: Leigh Dyer <leigh@eclinic.com.au>
Cc: Luke Lonergan <llonergan@greenplum.com>
Cc: Juan Casero (FL FLC) <Juan.Casero@wholefoods.com>
Cc: Josh Berkus <josh@agliodbs.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Sun Fire T2000 and PostgreSQL 8.1.3
Date: Thu, 06 Apr 2006 17:55:30 -0400
Message-ID: <44358E52.4020706@sun.com> (raw)
In-Reply-To: <443497AB.4000309@eclinic.com.au>
References: <C059B3A1.20F09%llonergan@greenplum.com>
<443497AB.4000309@eclinic.com.au>
Hi Leigh
inline comments
Leigh Dyer wrote:
> Luke Lonergan wrote:
>
>> Juan,
>
> We've got a Sun Fire V40z and it's quite a nice machine -- 6x 15krpm
> drives, 4GB RAM, and a pair of Opteron 850s. This gives us more than
> enough power now for what we need, but it's nice to know that we can
> shoehorn a lot more RAM, and up it to eight CPU cores if needed.
>
> The newer Sun Opteron systems look nice too, but unless you're using
> external storage, their little 2.5" hard drives may not be ideal.
>
Thats because Sun Fire V40z had write cache turned on while the
4200/4100 has the write cache turned off. There is a religious belief
around the "write cache" on the disk in Sun :-) To really compare the
performance, you have to turn on the write cache (I believe it was
format -e and the cache option.. but that could have changed.. need to
verify that again.. Same goes for T2000 SAS disks too.. Write cache is
turned off on it so be careful before you compare benchmarks on internal
drives :-)
-Jignesh
> Thanks
> Leigh
>
>>
>> - Luke
>>
>>
>>
>> ---------------------------(end of broadcast)---------------------------
>> TIP 2: Don't 'kill -9' the postmaster
>>
>
>
> ---------------------------(end of broadcast)---------------------------
> TIP 1: if posting/reading through Usenet, please send an appropriate
> subscribe-nomail command to majordomo@postgresql.org so that your
> message can get through to the mailing list cleanly
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-performance@postgresql.org
Cc: J.K.Shah@Sun.COM, leigh@eclinic.com.au, llonergan@greenplum.com, Juan.Casero@wholefoods.com, josh@agliodbs.com
Subject: Re: Sun Fire T2000 and PostgreSQL 8.1.3
In-Reply-To: <44358E52.4020706@sun.com>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox