LWLockAcquire

Hi all,
this morning I seen on my test linux box ( Postgres 7.2.2) the followin
lines in the logs:

Sep 24 13:49:59 pserver postgres[24943]: [1214174] DEBUG:  BackendStartup:
forked pid=11625 socket=9
Sep 24 13:49:59 pserver postgres[11625]: [1214174] DEBUG:  InitPostgres
Sep 24 13:49:59 pserver postgres[11625]: [1214175] FATAL 1:  Database
"template0" is not currently accepting connections
Sep 24 13:49:59 pserver postgres[11625]: [1214176] DEBUG:  proc_exit(0)
Sep 24 13:49:59 pserver postgres[11625]: [1214177] DEBUG:  shmem_exit(0)
Sep 24 13:49:59 pserver postgres[11625]: [1214178] FATAL 1:  LWLockAcquire:
can't wait without a PROC structure
Sep 24 13:49:59 pserver postgres[11625]: [1214179] DEBUG:  proc_exit(1)
Sep 24 13:49:59 pserver postgres[11625]: [1214180] DEBUG:  shmem_exit(1)
Sep 24 13:49:59 pserver postgres[11625]: [1214181] DEBUG:  exit(1)
Sep 24 13:49:59 pserver postgres[24943]: [1214175] DEBUG:  reaping dead
processes
Sep 24 13:49:59 pserver postgres[24943]: [1214176] DEBUG:  child process
(pid 11625) exited with exit code 1
Sep 24 13:49:59 pserver postgres[24943]: [1214177] DEBUG:  server process
(pid 11625) exited with exit code 1
Sep 24 13:49:59 pserver postgres[24943]: [1214178] DEBUG:  terminating any
other active server processes
Sep 24 13:49:59 pserver postgres[24943]: [1214179] DEBUG:  CleanupProc:
sending SIGQUIT to process 11623
Sep 24 13:49:59 pserver postgres[24943]: [1214180] DEBUG:  CleanupProc:
sending SIGQUIT to process 11609
Sep 24 13:49:59 pserver postgres[11623]: [1214193-1] NOTICE:  Message from
PostgreSQL backend:
Sep 24 13:49:59 pserver postgres[24943]: [1214181] DEBUG:  CleanupProc:
sending SIGQUIT to process 11595
Sep 24 13:49:59 pserver postgres[11609]: [1214157-1] NOTICE:  Message from
PostgreSQL backend:
Sep 24 13:49:59 pserver postgres[11623]: [1214193-2] ^IThe Postmaster has
informed me that some other backend
Sep 24 13:49:59 pserver postgres[24943]: [1214182] DEBUG:  CleanupProc:
sending SIGQUIT to process 11589
Sep 24 13:49:59 pserver postgres[11595]: [1214226-1] NOTICE:  Message from
PostgreSQL backend:
Sep 24 13:49:59 pserver postgres[11609]: [1214157-2] ^IThe Postmaster has
informed me that some other backend
Sep 24 13:49:59 pserver postgres[11623]: [1214193-3] ^Idied abnormally and
possibly corrupted shared memory.
Sep 24 13:49:59 pserver postgres[24943]: [1214183] DEBUG:  CleanupProc:
sending SIGQUIT to process 11584





The machine have 512MB of RAM and
I used for Postgres 128MB of shared memory
shared_buffers=15200
and
max_connections=64


anyone have any idea ?

Ciao
Gaetano