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* tuning on ec2
@ 2011-04-26 15:15 Joel Reymont <joelr1@gmail.com>
0 siblings, 1 reply; 3+ messages in thread
From: Joel Reymont @ 2011-04-26 15:15 UTC (permalink / raw)
To: pgsql-performance
I'm running pgsql on an m1.large EC2 instance with 7.5gb available memory.
The free command shows 7gb of free+cached. My understand from the docs is that I should dedicate 1.75gb to shared_buffers (25%) and set effective_cache_size to 7gb.
Is this correct? I'm running 64-bit Ubuntu 10.10, e.g.
Linux ... 2.6.35-28-virtual #50-Ubuntu SMP Fri Mar 18 19:16:26 UTC 2011 x86_64 GNU/Linux
Thanks, Joel
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^ permalink raw reply [nested|flat] 3+ messages in thread
* Re: tuning on ec2
@ 2011-05-12 03:38 Robert Haas <robertmhaas@gmail.com>
parent: Joel Reymont <joelr1@gmail.com>
0 siblings, 1 reply; 3+ messages in thread
From: Robert Haas @ 2011-05-12 03:38 UTC (permalink / raw)
To: Joel Reymont <joelr1@gmail.com>; +Cc: pgsql-performance
On Tue, Apr 26, 2011 at 11:15 AM, Joel Reymont <joelr1@gmail.com> wrote:
> I'm running pgsql on an m1.large EC2 instance with 7.5gb available memory.
>
> The free command shows 7gb of free+cached. My understand from the docs is that I should dedicate 1.75gb to shared_buffers (25%) and set effective_cache_size to 7gb.
Sounds like a reasonable starting point. You could certainly fiddle
around a bit - especially with shared_buffers - to see if some other
setting works better, but that should be in the ballpark.
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
^ permalink raw reply [nested|flat] 3+ messages in thread
* Re: tuning on ec2
@ 2011-05-13 00:10 Josh Berkus <josh@agliodbs.com>
parent: Robert Haas <robertmhaas@gmail.com>
0 siblings, 0 replies; 3+ messages in thread
From: Josh Berkus @ 2011-05-13 00:10 UTC (permalink / raw)
To: pgsql-performance
> Sounds like a reasonable starting point. You could certainly fiddle
> around a bit - especially with shared_buffers - to see if some other
> setting works better, but that should be in the ballpark.
I tend to set it a bit higher on EC2 to discourage the VM from
overcommitting memory I need. So, I'd do 2.5GB for that one.
--
Josh Berkus
PostgreSQL Experts Inc.
http://pgexperts.com
^ permalink raw reply [nested|flat] 3+ messages in thread
end of thread, other threads:[~2011-05-13 00:10 UTC | newest]
Thread overview: 3+ messages (download: mbox mbox.gz follow: Atom feed)
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2011-04-26 15:15 tuning on ec2 Joel Reymont <joelr1@gmail.com>
2011-05-12 03:38 ` Robert Haas <robertmhaas@gmail.com>
2011-05-13 00:10 ` Josh Berkus <josh@agliodbs.com>
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