b) Back up your system. (You should probably keep the last few

backups on hand.) Ideally, no one else should be using the

system at the time.

c) Stop and restart the postmaster. The software currently

suffers from memory leaks. This means that as more commands

are processed, the program will allocate, then forget about,

more and more memory. Eventually your computer will run

low on memory and start to swap excessively. This problem

will probably be gone in the next release.

Ideally, the above tasks should be done by a shell script that is

run nightly or weekly by cron. Look at the man page for crontab