Thanks for your reply >> I now fork() a process in _PG_Init() (both processes interact), but when I >> shutdown postgre I get: LOG: failed to find proc 0x1331110 in ProcArray >What exactly is that child process doing? It sure sounds like it thinks >it's a valid backend. Actually it's not doing anything, as I'm just trying to work it all out - just a bunch of printfs and waits. But the library is a PG_MAGIC_MODULE. I tried killing it with pg_terminate_backend(pid) - but I get WARNING: PID 1166738497 is not a PostgreSQL server process. (Interestingly the child pid=28629, which was printed in the line before) >You can fork something if you like, but it had absolutely better not >touch any part of shared memory afterwards. Sure - it is intended to run independently. Is there an internal pfork() or something similar I should use instead? -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general