There are no conflicting locks; this occurs both concurrently with other processes (dealing with other rows) and when the only two processes with locks on the database are the one that hangs and the one I'm using to examine pg_locks. On Wed, 2005-12-21 at 08:02, Pandurangan R S wrote: > When the delete statements hangs, look into the pg_locks table, to > check if the delete statement is waiting because it has conflict with > rows locked by other transactions. > > On 20 Dec 2005 16:21:53 +0000, Jonathan Parkin > <jonathan.parkin@xxxxxxxxxxxxx> wrote: > > I have a reasonably large, live, system-critical database. A perl > > script on another machine connects and issues a sequence of commands in > > a transaction, the last of which is a delete. The delete never returns > > a response, and the connection never times out. The postgres process > > handling the delete is in a scheduled state, but stracing it produces no > > output at all. [Remainder of original message cut for brevity] -- Best Regards Jonathan Parkin Developer Legend Communications plc T: 0844 390 2049 F: 0844 390 2001 E: jonathan.parkin@xxxxxxxxxxxxx W: http://www.legend.co.uk/ The information in this message is confidential and may be legally privileged. Unauthorised disclosure, copying or distribution, either whole or in part; or action taken in reliance on its content is prohibited. If you are not the intended recipient, please notify Legend Communications immediately.