Bruce Momjian has an other interesting manual on hardware performance
tuning:
http://candle.pha.pa.us/main/writing...nce/index.html

It covers a lot of the same ground plus some other goodies.

/John

>>> "Joel Fradkin" <jfradkin@wazagua.com> 12-02-2005 16:22:28 >>>
This was also in the Desknow web page.

changing these parameters will probably cause postgres to not start.
su - postgres
pg_ctl -D /var/lib/pgsql/data start ( I actualy left the path off )
in the message it says you need to increase SHMMAX to a certain
number.

To do this you must be root
echo <shared_buffers * 8192> /proc/sys/kernel/shmmax

to make it permanent
edit /etc/sysctl.conf
kernel.shmmax = <shared_buffers * 8192>

example shared_buffers = 20000 it is 167763968 (160mb).



Joel Fradkin




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