Error interno de postgres 8.4

Hola,

Estamos teniendo problemas con nuestra base de datos, eventualmente se para cayendo y el error que sale es el siguiente:

[5968---2012-12-01 17:33:36.211 COT]LOG: server process (PID 4716) was terminated by exception 0xC0000005
[5968---2012-12-01 17:33:36.211 COT]HINT: See C include file "ntstatus.h" for a description of the hexadecimal value.
[5968---2012-12-01 17:33:36.211 COT]LOG: terminating any other active server processes
[2824-cemdb-postgres-2012-12-01 17:33:36.258 COT]WARNING: terminating connection because of crash of another server process
[2824-cemdb-postgres-2012-12-01 17:33:36.258 COT]DETAIL: The postmaster has commanded this server process to roll back the current transaction and exit, because another server process exited abnormally and possibly corrupted shared memory.
[2824-cemdb-postgres-2012-12-01 17:33:36.258 COT]HINT: In a moment you should be able to reconnect to the database and repeat your command.

Bueno nuestra base de datos esta sobre un Windows Server 2008 64-bits, PostgreSql 8.4 y aproximadamente se maneja datos de 5 millones de registros.

Saludos,
Enrique Mestas