Re: Performance monitor signal handler

* Philip Warner <pjw@rhyme.com.au> [010313 06:42] wrote:
> >
> >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.

I wasn't really suggesting any of those courses of action, all I
suggested was using rename(2) to give a seperate appilcation a
consistant snapshot of the stats.

Actually, what makes the most sense (although it may be a performance
killer) is to have the backends update a system table that the external
app can query.

-- 
-Alfred Perlstein - [bright@wintelcom.net|alfred@freebsd.org]
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