oid_index size problem

Hi,

 I wrote an application that uses PgSQL as database backend. It ran for
almost a year and now it's database directory grew to 85633Kbyte.
Inspecting this directory, I found out that a file called oid_index grew
to 84058112 bytes, i.e. 99% of the database is index. What went wrong?
What can be done now? I use a PgSQL 6.4.2 on a AIX 4.2..

    THanks in advance


--------------------------------------------------------------------------------
Sebestyén Zoltán <szoli@netvisor.hu>    There was a time when all on my mind
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                    love's not enough in itself.

I use UNIX because reboots are for hardware upgrades.

                 Kick me! Whip me!! Make me develop on AIX!!!