Without knowing more details about what version of postgres and type of activities going on,etc, it may be hard to figure out what's going out. However, one maintenance operation that you want to make sure it happens to is to run vacuum/analyze periodically so that expired tuples can be re-used, and your statistics get updated in the db system catalog.
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Husam
I have a trouble.
My DBMS is PostgreSQL which is accessory to Red hat 9.0.
At the initial stages, it was very quick when select ,but operated for several months , it become to very slow ,especially in a pivotal table.
So,I exported data ,and recreate tables , finally import data, it get right .
I do not know why. and what is the solution to my trouble
Thank you very much ~~
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