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PostgreSQL processes and the signals to which they respond

For PostgreSQL 8.3 and later, what are the processes that make up the server and that respond to a query? What signals do the various processes respond to and what effect do the signals have? What ...
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3answers
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Un-killable user processes in Linux?

I use sshfs (fusermount) to connect remote mountpoints. When I forget to unmount them using... fusermount -u /REMOTE ...all processes which used the mountpoints hang. I try to kill them with ...