On Wednesday 14 April 2004 18:53, Rajesh Kumar Mallah wrote:
> Hi
> I have .5 million rows in a table. My problem is select count(*) takes
> ages. VACUUM FULL does not help. can anyone please tell me
> how to i enhance the performance of the setup.

> SELECT count(*) from eyp_rfi;

If this is the actual query you're running, and you need a guaranteed accurate 
result, then you only have one option: write a trigger function to update a 
table_count table with every insert/delete to eyp_rfi.

There is loads of info on this (and why it isn't as simple as you might think) 
in the archives. First though:
1. Is this the actual query, or just a representation?
2. Do you need an accurate figure or just something "near enough"?

  Richard Huxton
  Archonet Ltd

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