| From: | "Jonah H(dot) Harris" <jonah(dot)harris(at)gmail(dot)com> |
|---|---|
| To: | "Greg Stark" <gsstark(at)mit(dot)edu> |
| Cc: | "Mark Lewis" <mark(dot)lewis(at)mir3(dot)com>, "Dan Gorman" <dgorman(at)hi5(dot)com>, pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: Postgres fsync off (not needed) with NetApp |
| Date: | 2006-06-15 05:14:26 |
| Message-ID: | 36e682920606142214i6a6532f3k1a895a784f7b16dc@mail.gmail.com |
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| Lists: | pgsql-performance |
On 14 Jun 2006 23:33:53 -0400, Greg Stark <gsstark(at)mit(dot)edu> wrote:
> In fact the benefit of the NVRAM is precisely that it makes sure you *don't*
> have any reason to turn fsync off. It should make the fsync essentially free.
Having run PostgreSQL on a NetApp with input from NetApp, this is
correct. fsync should be turned on, but you will not incur the *real*
direct-to-disk cost of the sync, it will be direct-to-NVRAM.
--
Jonah H. Harris, Software Architect | phone: 732.331.1300
EnterpriseDB Corporation | fax: 732.331.1301
33 Wood Ave S, 2nd Floor | jharris(at)enterprisedb(dot)com
Iselin, New Jersey 08830 | http://www.enterprisedb.com/
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