hi all, i need help on this.. i'm experiencing this problem too often and i need a permanent solution. im using 7.3.4 .... config file tcpip_socket = true max_connections = 150 superuser_reserved_connections = 2 port = 5432 #shared_buffers = 45800 shared_buffers = 47900 sort_mem = 40000 #max_locks_per_transaction=160 max_locks_per_transaction=200 #fsync = true #wal_sync_method = fsync # # Locale settings # # (initialized by initdb -- may be changed) LC_MESSAGES = 'en_US.UTF-8' LC_MONETARY = 'en_US.UTF-8' LC_NUMERIC = 'en_US.UTF-8' LC_TIME = 'en_US.UTF-8' ... config ends im having problems on our DB.. # update table_fan set active_flag='n' where num='12345678'; WARNING: ShmemAlloc: out of memory ERROR: FreeSpaceMap hashtable out of memory temporary solution: restart the DB and all things went back to normal. trying the same SQL would result to an update.. ---------------------------(end of broadcast)--------------------------- TIP 7: don't forget to increase your free space map settings