Performance monitor signal handler

I was going to implement the signal handler like we do with Cancel,
where the signal sets a flag and we check the status of the flag in
various _safe_ places.

Can anyone think of a better way to get information out of a backend?

--  Bruce Momjian                        |  http://candle.pha.pa.us pgman@candle.pha.pa.us               |  (610)
853-3000+  If your life is a hard drive,     |  830 Blythe Avenue +  Christ can be your backup.        |  Drexel Hill,
Pennsylvania19026