Thread: What does this mean: SIAssignBackendId: discarding tag 2147483505 in 6.3.4

NOTICE: SIAssignBackendId: discarding tag 2147483505
/extra/env1/logs/postmaster.log: Wed Mar 17 13:07:55 PST 1999: FATAL 1: Backend cache invalidation initialization
failed

It seems to be happening when my databases cross some size threshold.

Problem occurrs under freebsd and linux.