Backend coredump :(

Alexandr Shutko (AVShutko(at)mail(dot)khstu(dot)ru) reports a bug with a severity of 1
The lower the number the more severe it is.

Short Description
Backend coredump :(

Long Description
Well, i'm writing ICQ server - today is third day when i testing it under serious load () It work fine, but there is one problem - all contacts lists and online users records are stored in special tables - after one hour pgsql backends start eat too many cpu resources and icq server response become very big - i decide this problem by vacuuming database each 10 minutes (cron) But pgsql server start crashing and i can't start it again without machine reboot - problem with semaphores and shmem (ipcclean doesn't help :()

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