vacuum questions

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Currently running v7.4.8 postgres on a RHE Linux 4.0 box. Will be upgraded to postgres 8.2.x sometime this fall.

Several of the tables in the database that resides on this system have lots of inserts and updates. Very little is deleted at this time, as the database is intended for archiving.

Currently a cron job runs a vacuum analyze 3 times a day. Is there any need to run a vacuum full every so often? If so, how often should a vacuum full be done? And do all other processes that "hit" the database need to shut off when a vacuum full is done?

Also another office that has a similar setup has switched to running pg_autovacuum instead of the vacuum analyze 3 times/day, are there any advantages and/or disadvantages to this approach?

Thanks in advance for any information and guidance you can give,
Julie



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fn:A. Juliann Meyer
org:National Weather Service;Missouri Basin River Forecast Center
adr;dom:;;;Pleasant Hill;MO;64080
email;internet:julie.meyer@xxxxxxxx
title:Sr. Hydrologist - Data Systems
x-mozilla-html:FALSE
version:2.1
end:vcard

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