SignalChildren: sending signal 12

Hi today the postmaster ( Postgres 7.3.2 ) sent to all back end the signal
12!!!!

Apr  9 17:20:03 sdr2 postgres[16882]: [420740] DEBUG:  BackendStartup:
forked pid=5217 socket=9
Apr  9 17:20:03 sdr2 postgres[16882]: [420741] DEBUG:  child process (pid
5216) exited with exit code 0
Apr  9 17:20:03 sdr2 postgres[16882]: [420742] DEBUG:  child process (pid
5217) exited with exit code 0
Apr  9 17:20:04 sdr2 postgres[16882]: [420743] DEBUG:  child process (pid
5161) exited with exit code 0
Apr  9 17:20:05 sdr2 postgres[16882]: [420744] DEBUG:  SignalChildren:
sending signal 12 to process 5191
Apr  9 17:20:05 sdr2 postgres[16882]: [420745] DEBUG:  SignalChildren:
sending signal 12 to process 5164
Apr  9 17:20:05 sdr2 postgres[16882]: [420746] DEBUG:  SignalChildren:
sending signal 12 to process 5163
Apr  9 17:20:05 sdr2 postgres[16882]: [420747] DEBUG:  SignalChildren:
sending signal 12 to process 4774
......................
Apr  9 17:20:05 sdr2 postgres[16882]: [420785] DEBUG:  SignalChildren:
sending signal 12 to process 9794
Apr  9 17:20:05 sdr2 postgres[16882]: [420786] DEBUG:  SignalChildren:
sending signal 12 to process 9784
Apr  9 17:20:05 sdr2 postgres[16882]: [420787] DEBUG:  SignalChildren:
sending signal 12 to process 9771
Apr  9 17:20:05 sdr2 postgres[16882]: [420788] DEBUG:  SignalChildren:
sending signal 12 to process 9770
Apr  9 17:20:05 sdr2 postgres[16882]: [420789] DEBUG:  SignalChildren:
sending signal 12 to process 9676



after 10 minutes the disaster:


Apr  9 17:30:01 sdr2 postgres[16882]: [421879] DEBUG:  child process (pid
6020) was terminated by signal 11
Apr  9 17:30:01 sdr2 postgres[16882]: [421880] LOG:  server process (pid
6020) was terminated by signal 11
Apr  9 17:30:01 sdr2 postgres[16882]: [421881] LOG:  terminating any other
active server processes
Apr  9 17:30:01 sdr2 postgres[16882]: [421882] DEBUG:  CleanupProc: sending
SIGQUIT to process 6021
Apr  9 17:30:01 sdr2 postgres[16882]: [421883] DEBUG:  CleanupProc: sending
SIGQUIT to process 6019
Apr  9 17:30:01 sdr2 postgres[16882]: [421884] DEBUG:  CleanupProc: sending
SIGQUIT to process 6011
............
Apr  9 17:30:01 sdr2 postgres[16882]: [421929] DEBUG:  CleanupProc: sending
SIGQUIT to process 10961
Apr  9 17:30:01 sdr2 postgres[16882]: [421930] DEBUG:  CleanupProc: sending
SIGQUIT to process 10959
Apr  9 17:30:01 sdr2 postgres[16882]: [421931] DEBUG:  CleanupProc: sending
SIGQUIT to process 9794
Apr  9 17:30:01 sdr2 postgres[16882]: [421932] DEBUG:  CleanupProc: sending
SIGQUIT to process 9784
Apr  9 17:30:01 sdr2 postgres[16882]: [421933] DEBUG:  CleanupProc: sending
SIGQUIT to process 9771
Apr  9 17:30:01 sdr2 postgres[16882]: [421934] DEBUG:  CleanupProc: sending
SIGQUIT to process 9770
Apr  9 17:30:01 sdr2 postgres[16882]: [421935] DEBUG:  CleanupProc: sending
SIGQUIT to process 9676



Any idea ?


Regards Gaetano