Re: Low Performance for big hospital server ..

William Yu wrote:
> amrit@health2.moph.go.th wrote:
>> Yes , vacuumdb daily.
> 
> Do you vacuum table by table or the entire DB? I find over time, the 
> system tables can get very bloated and cause a lot of slowdowns just due 
> to schema queries/updates. You might want to try a VACUUM FULL ANALYZE 
> just on the system tables.

A REINDEX of the system tables in stand-alone mode might also be in 
order, even for a 7.4.x database:

http://www.postgresql.org/docs/7.4/interactive/sql-reindex.html

If a dump-reload-analyze cycle yields significant performance 
improvements then we know it's due to dead-tuple bloat - either heap 
tuples or index tuples.

Mike Mascari