nonremovable row versions

Hi,

can anybody tell me how to get rid of nonremovable row versions ?
I know what those rows coming from long running transactions. But I can't see
any long running transactions in pg_locks and all postgres processes are idle.
How else can I check if transaction in process ?


I don't have any idea from where those long running transaction are comming
because we are stopping/starting our apllications every 2-3 days. And its not
the nature of our applications to establish long running transactions.

We are using postgresql 8.1.4.

Kindly regards
Lutz
4c GmbH