From: | Josh Close <narshe(at)gmail(dot)com> |
---|---|
To: | POSTGRES-PERFORMANCE <pgsql-performance(at)postgresql(dot)org> |
Subject: | how much mem to give postgres? |
Date: | 2004-10-19 22:31:59 |
Message-ID: | 4a0cafe2041019153133f854e9@mail.gmail.com |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-performance |
I'm trying to figure out what I need to do to get my postgres server
moving faster. It's just crawling right now. It's on a p4 HT with 2
gigs of mem.
I was thinking I need to increase the amount of shared buffers, but
I've been told "the sweet spot for shared_buffers is usually on the
order of 10000 buffers". I already have it set at 21,078. If you have,
say 100 gigs of ram, are you supposed to still only give postgres
10,000?
Also, do I need to up the shmmax at all? I've used the formula "250 kB
+ 8.2 kB * shared_buffers + 14.2 kB * max_connections up to infinity"
at http://www.postgresql.org/docs/7.4/interactive/kernel-resources.html#SYSVIPC
but it's never quite high enough, so I just make sure it's above the
amount that the postgres log says it needs.
What else can I do to speed this server up? I'm running vacuum analyze
on the heavily updated/inserted/deleted db's once an hour, and doing a
full vacuum once a night. Should I change the vacuum mem setting at
all?
Are there any other settings I should be concerned with? I've heard
about the effective_cache_size setting, but I haven't seen anything on
what the size should be.
Any help would be great. This server is very very slow at the moment.
Also, I'm using a 2.6.8.1 kernel with high mem enabled, so all the ram
is recognized.
Thanks.
-Josh
From | Date | Subject | |
---|---|---|---|
Next Message | Tom Lane | 2004-10-19 22:39:48 | Re: futex results with dbt-3 |
Previous Message | Kevin Barnard | 2004-10-19 22:09:21 | Re: [PERFORM] Performance on Win32 vs Cygwin |