Re: Performance monitor signal handler
Bruce Momjian <pgman@candle.pha.pa.us>
From: Bruce Momjian <pgman@candle.pha.pa.us>
To: Philip Warner <pjw@rhyme.com.au>
Cc: Alfred Perlstein <bright@wintelcom.net>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2001-03-13T14:55:27Z
Lists: pgsql-hackers
> > > >This ought to always give a consistant snapshot of the file to > >whomever opens it. > > > > I think Tom has previously stated that there are technical reasons not to > do IO in signal handlers, and I have philosophical problems with > performance monitors that ask 50 backends to do file IO. I really do think > shared memory is TWTG. The good news is that right now pgmonitor gets all its information from 'ps', and only shows the query when the user asks for it. -- 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, Pennsylvania 19026