Postgresql 8.3 on OSX hangs

Hi all;

we have a client experiencing the following scenario:


- Postgresql 8.3.10 plus postgis 1.5.1

- Both databases stop responding to queries and several of the backend
processes show as being in an uninterruptible state (state "Us" according to
a ps aux)

- The client killed the processes, did a pg_dumpall and a restore only to find
the condition happen again the next day

- The client read every file reported by lsof as being accessed by a backend
process without issues.. thus it seems to NOT be a disk I/O issue.



Thoughts?



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