[Catalyst] Re: How to read the performance information

[Julien Sobrier]

Hello,
I don't have any DNS lookup in my application. Does catalyst make any
reverse DNS lookup in debug mode?

Thank you
Julien

On Fri, Feb 19, 2010 at 9:01 PM, Aristotle Pagaltzis <pagaltzis at gmx.de>wrot=
e:

> * Andrew Rodland <andrew at cleverdomain.org> [2010-02-19 07:35]:
> > On Thursday 18 February 2010 11:14:46 pm Julien Sobrier wrote:
> > > The time don't add up. Form the timing under Action. it took
> > > less than 1 second. But the line before says 8.27s. Does it
> > > mean 7+ seconds were spend doing something else? Doing what?
> > >
> > There are two things that spring to mind:
> >
> > 1. Time spent reading the request from the user (after the
> > connection is made but before the full request is received) is
> > accounted to the "Request took" time but not to any action.
> > Normally this should be a very small amount of time for a GET,
> > but in case of very bad network conditions it could be longer.
> > This wouldn't be any indication of the performance of your app.
> >
> > 2. Your system could have had a major I/O stall between the
> > beginning of request handling and the beginning of action
> > dispatch, or between the end of action dispatch and the end of
> > request handling. You would probably know if this was
> > happening. :)
>
> Or something that qualifies as both. My immediate first suspicion
> in such cases: check your DNS lookup machinery.
>
> Regards,
> --
> Aristotle Pagaltzis // <http://plasmasturm.org/>
>
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