| From: | Alvaro Herrera <alvherre(at)commandprompt(dot)com> |
|---|---|
| To: | Greg Stark <gsstark(at)mit(dot)edu> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Robert Haas <robertmhaas(at)gmail(dot)com>, daveg <daveg(at)sonic(dot)net>, Mark Kirkwood <mark(dot)kirkwood(at)catalyst(dot)net(dot)nz>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: PostgreSQL and HugePage |
| Date: | 2010-10-20 19:39:09 |
| Message-ID: | 1287603509-sup-8441@alvh.no-ip.org |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
Excerpts from Greg Stark's message of mié oct 20 16:28:25 -0300 2010:
> On Wed, Oct 20, 2010 at 12:17 PM, Greg Stark <gsstark(at)mit(dot)edu> wrote:
> > I don't think it's a big cost once all the processes
> > have been forked if you're reusing them beyond perhaps slightly more
> > efficient cache usage.
>
> Hm, this site claims to get a 13% win just from the reduced tlb misses
> using a preload hack with Pg 8.2. That would be pretty substantial.
>
> http://oss.linbit.com/hugetlb/
Wow, is there no other way to get the huge page size other than opening
and reading /proc/meminfo?
--
Álvaro Herrera <alvherre(at)commandprompt(dot)com>
The PostgreSQL Company - Command Prompt, Inc.
PostgreSQL Replication, Consulting, Custom Development, 24x7 support
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