Postgres running Very slowly

Hi -,
I have a very peculiar situation.

I am running a postgres 7.4.6 database. It is running slow....... .
I vacuum --analyze daily. I just did again.
I did a vacuum full last night.

But to no avail. CPU usage and memory are normal, but the system is crawling.

Here is the info from vacuum.

CPU 0.02s/0.01u sec elapsed 0.02 sec.
INFO:  free space map: 167 relations, 1412 pages stored; 3440 total pages needed
DETAIL:  Allocated FSM size: 1000 relations + 20000 pages = 178 kB shared memory.
VACUUM


Is there anything else I should be looking at like FSM configuration in the conf file?

Any help would be appreciated.

Thanks.
Radhika

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