| From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
|---|---|
| To: | Philip Warner <pjw(at)rhyme(dot)com(dot)au> |
| Cc: | Alfred Perlstein <bright(at)wintelcom(dot)net>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Performance monitor signal handler |
| Date: | 2001-03-13 14:55:27 |
| Message-ID: | 200103131455.JAA09690@candle.pha.pa.us |
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| 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(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
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