tunning strategy needed

Hello,

I have an old application that was written on Postgres 8.1.
There are a few hundreds tables, 30-40 columns per table,  hundreds of
views,  and all the sql is inside java code.

We are moving it to 8.4, it seems to be VERY slow.
There are 20-30 tables transactions - the objects are spread acrross
multiple tables and some tables have data from different objects.

I need a short term tuning strategy minimizing rewrite  & redesign.

Should I start with replacing the sql with procedures?

Should I start with replacing the views with the procedures to save time on
recreating an execution plan and parsing?

Should I start with tuning server parameters ?

all your suggestions are greatly appreciated!

thank you.

Helen

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