From: Shaun Thomas <sthomas@optionshouse.com>
To: Strahinja Kustudić <strahinjak@nordeus.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: shared_buffers/effective_cache_size on 96GB server
Date: Wed, 10 Oct 2012 09:38:15 -0500
Message-ID: <50758857.6030008@optionshouse.com> (raw)
In-Reply-To: <CADKbJJXNBLqDFwj3gnaZXdqU1sRU1qRLz=jJnyEWhUQJCC5vNQ@mail.gmail.com>
References: <CADKbJJUTr9ZWkbajR-7_6qaAsWH0=09=2AMo67C_Az-raKZE4w@mail.gmail.com>
<507573A4.1090605@optionshouse.com>
<CADKbJJXNBLqDFwj3gnaZXdqU1sRU1qRLz=jJnyEWhUQJCC5vNQ@mail.gmail.com>
On 10/10/2012 09:35 AM, Strahinja Kustudić wrote:
> #sysctl vm.dirty_ratio
> vm.dirty_ratio = 40
> # sysctl vm.dirty_background_ratio
> vm.dirty_background_ratio = 10
Ouuuuch. That looks a lot like an old RHEL or CentOS system. Change
those ASAP. Currently your system won't start writing dirty buffers
until it hits 9.6GB. :(
> shows that these values are even higher by default. When you said
> RAID buffer size, you meant the controllers cache memory size?
Yeah, that. :)
--
Shaun Thomas
OptionsHouse | 141 W. Jackson Blvd. | Suite 500 | Chicago IL, 60604
312-444-8534
sthomas@optionshouse.com
______________________________________________
See http://www.peak6.com/email_disclaimer/ for terms and conditions related to this email
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: sthomas@optionshouse.com, strahinjak@nordeus.com
Subject: Re: shared_buffers/effective_cache_size on 96GB server
In-Reply-To: <50758857.6030008@optionshouse.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