Re: Mejor Tuning Postresql 8.2.14 para DELL T100

El 15/02/2010 20:33, Fernando Hevia escribió:
>
>
>
>> -----Mensaje original-----
>> De: Ramón Alberto Bruening González
>>
>> Hola a todos, quiseria saber si podrian pasar cual seria la
>> mejor configuracion del postgres para un servidor DELL T100
>> con la siguientes configuracion:
>>
>> Proc. XEON Quad Core
>>
>> Mem 4Gb
>>
>> Disco Duro Raid 1 de 1 TB SATA 2
>>
>> Sistema Operativo Fedora 8
>>
>> Postgresql 8.2.14
>>
>> desde ya muchas gracias.
>>
>>
> Hola Ramón,
>
> La información provista es insuficiente para hacer una recomendación. Para
> ello necesitaríamos conocer algunos datos adicionales:
> - ¿el servidor será dedicado para PG? Sino, ¿que cantidad de memoria quedará
> libre después de que levanten las otras aplicaciones?
> - ¿cantidad máxima de usuarios concurrentes?
> - ¿tamaño estimado de la base de datos?
> - ¿tipo de actividad esperada (ej. DataWarehouse, OLTP, Web server, etc.)
> - ¿el server cuenta con una controladora raid c/ BBU?
>
>
> Saludos,
> Fernando.
>
> --
> TIP 7: no olvides aumentar la configuración del "free space map"
>
Además de la información que te pidió Fernando, pudieras también usar
pgtune(http://pgfoundry.org/projects/pgtune), que es básicamente un
script que te hace recomendaciones
de la configuración postgresql.conf con respecto al hardware existente
en tu PC. Espero que te sirva de algo
Aquí te dejo el README del proyecto:
----------------------------------------------
Introduction
============

pgtune takes the wimpy default postgresql.conf and expands the database
server to be as powerful as the hardware it's being deployed on.

Installation/Usage
==================

Source installation
-------------------

There is no need to build/compile pgtune, it is a Python script.
Extracting tarball to a convenient location is sufficient.
Note that you will need the multiple

RPM Installation
----------------

The RPM package installs:

* The pgtune binary under/usr/bin
* Documents in /usr/share/doc/pgtune-$version
* Setting files in /usr/share/pgtune

Using pgtune
============

pgtune works by taking an existing postgresql.conf file as an input,
making changes to it based on the amount of RAM in your server and
suggested workload, and output a new file.

Here's a sample usage::

pgtune -i $PGDATA/postgresql.conf -o $PGDATA/postgresql.conf.pgtune

pgtune --help will give you additional usage information. These
are the current parameters:

* -i or --input-config : Specifies the current postgresql.conf file.

* -o or --input-config : Specifies the file name for the new
postgresql.conf file.

* -M or --memory: Use this parameter to specify total system memory. If
not specified, pgtune will attempt to detect memory size.

* -T or --type : Specifies database type. Valid options are:
DW, OLTP, Web, Mixed, Desktop

* -c or --connections: Specifies number of maximum connections expected.
If not specified, it depends on database type.

* -D or --debug : Enables debugging mode.

* -S or --settings: Directory where settings data files are located at.
Defaults to the directory where the script is being run from. The
RPM package includes a patch to use the correct location these
files were installed into.

Todo
====

A TODO list is included in the tarball. There are also some TODO
items marked in the source code itself.

Bugs
====

There aren't any known bugs, besides the cleanup areas mentioned
in the source code with TODO tags. These shouldn't impact use of
the program. If you find a bug, there is a tracker on the pgfoundry
page for pgtune listed below.

Documentation
=============

The documentation README for pgtune is in ReST markup. Tools
that operate on ReST can be used to make versions of it formatted
for other purposes, such as rst2html to make a HTML version.

Contact
=======

* The project is hosted at http://pgfoundry.org/projects/pgtune
* Initial commits are done in the git reportiory at
http://git.postgresql.org/git/pgtune.git.

If you have any hints, changes or improvements, please contact:

* Greg Smith gsmith(at)gregsmith(dot)com

License
=======

pgtune is licensed under a standard 3-clause BSD license.

Copyright (c) 2009, Gregory Smith
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:

* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
* Neither the name of the author nor the names of contributors may
be used to endorse or promote products derived from this
software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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