Horton

Re: Performance monitor signal handler

Thomas Swan <tswan-lst@ics.olemiss.edu>

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From: Thomas Swan <tswan-lst@ics.olemiss.edu>
To: Alfred Perlstein <bright@wintelcom.net>, Philip Warner <pjw@rhyme.com.au>
Cc: Bruce Momjian <pgman@candle.pha.pa.us>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2001-03-13T21:36:59Z
Lists: pgsql-hackers 
>On reciept of the info signal, the backends collaborate to piece
>together a status file.  The status file is given a temporay name.
>When complete the status file is rename(2)'d over a well known
>file.

Reporting to files, particularly well known ones, could lead to race 
conditions.

All in all, I think your better off passing messages through pipes or a 
similar communication method.

I really liked the idea of a "server" that could parse/analyze data from 
multiple backends.

My 2/100 worth...