Re: Pgsql 7.4/8.0 on IA64 HP-UX 11i?

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: "Ed L(dot)" <pgsql(at)bluepolka(dot)net>
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: Pgsql 7.4/8.0 on IA64 HP-UX 11i?
Date: 2004-09-28 19:18:45
Message-ID: 17225.1096399125@sss.pgh.pa.us
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-general

"Ed L." <pgsql(at)bluepolka(dot)net> writes:
>> I wouldn't panic. 99% of the value of a 64-bit box for database work
>> is that you can handle more than 4Gb worth of RAM for disk cache. Since
>> in Postgres's worldview most of the disk caching is supposed to be done
>> by the kernel, it really matters not whether the Postgres executables
>> think they are 32-bit or 64-bit. All you need is a 64-bit kernel.

> The HPUX gurus on http://forums1.itrc.hp.com testify that kernel caches
> above approximately 600MB are counter-productive to performance.

Why? And why would you think that whatever effect is limiting the
performance would not also apply to Postgres?

regards, tom lane

In response to

Responses

Browse pgsql-general by date

  From Date Subject
Next Message Ed L. 2004-09-28 19:36:27 Re: Pgsql 7.4/8.0 on IA64 HP-UX 11i?
Previous Message Ed L. 2004-09-28 19:12:37 Re: Pgsql 7.4/8.0 on IA64 HP-UX 11i?