Re: Configuring Shared Buffers - Mailing list pgsql-admin
| From | Rafael Domiciano |
|---|---|
| Subject | Re: Configuring Shared Buffers |
| Date | |
| Msg-id | 3a0028490806301616v6882a40bi2b54dcf63b37e315@mail.gmail.com Whole thread Raw |
| In response to | Re: Configuring Shared Buffers (Tino Schwarze <postgresql@tisc.de>) |
| Responses |
Re: Configuring Shared Buffers
(Alvaro Herrera <alvherre@commandprompt.com>)
|
| List | pgsql-admin |
Yes, the server just does S, U, I and D.
The queries is pretty simples, don't have huge joins across tables...
In this server I have around 500 tables, the largest are:
9 millions tuples | 5 millions tuples
This server is our "authenticator"; the response is need to be "imediatly".
Today, the monitoring of the server is done using the unix command: loguptime
With the time we discovered that when loguptime is up than 1.0 the response begin to late, and the applications begin to take "Time-out".
The queries is pretty simples, don't have huge joins across tables...
In this server I have around 500 tables, the largest are:
9 millions tuples | 5 millions tuples
This server is our "authenticator"; the response is need to be "imediatly".
Today, the monitoring of the server is done using the unix command: loguptime
With the time we discovered that when loguptime is up than 1.0 the response begin to late, and the applications begin to take "Time-out".
2008/6/30 Tino Schwarze <postgresql@tisc.de>:
On Mon, Jun 30, 2008 at 04:01:14PM -0300, Rafael Domiciano wrote:And what does the server do? Mainly SELECT / UPDATE / INSERT / DELETE,
> The Postgres version is 8.3.3 and I am using Fedora Core 8.
> I have in the actual server around 70 connections the same time. I am
> assigning for this 100.
how is workload distributed, are queries very complex or pretty simple
are there huge joins across many tables?
How many tables do you have and what are the largest ones? Are we talking
about thousands of rows or millions or lots of millions?
Tino.--
> > > Folks, I am configuring a new Postgres Server, that's gonna substitute
> > the
> > > critical server of the enterprise.
> > > I have a good machine:
> > > Quad-Core 2.5 Ghz
> > > 4 Gb RAM
> > > 1 Dedicated HD 300 Gb Sata for the PostgreSQL Directory
> >
> > If it's the "critical server", you'd want to use a RAID1 for the disk so
> > your server and data survives a harddisk crash.
> >
> > > My question is:
> > > How much I could assign for the "Shared Buffers" parameter?
> > >
> > > The default assigned now is 24 Mb.
> >
> > That's rather low. I suppose, you may safely say 200Mb here (check that
> > you don't run into OS limits, they might need raising). You may also
> > want to increase work_mem, but it depends on what the DB does, how many
> > concurrent connections you have etc. pp. maintenance_work_mem may safely
> > be set rather high - it speeds up vacuum etc. and is only used during
> > such operations. Also look for effective_cache_size and max_fsm_pages.
> >
> > BTW: What version are you going to use?
> >
> > Tino.
> >
> > --
> > "What we nourish flourishes." - "Was wir nähren erblüht."
> >
> > www.craniosacralzentrum.de
> > www.forteego.de
> >
> > --
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