man pound
Threads nnn
How many worker threads Pound should use. Default: 128. Tune this
parameter to improve performance. If you set it too high, Pound will use a lot
memory, and some CPU will be wasted on context switches. If you set it
too low requests may be served with some delay. Experiment to
find the optimal value for your installation.
Joe
> -----Original Message-----
> From: [email protected] [mailto:[email protected]]
> Sent: Thursday, February 09, 2012 11:22 AM
> To: [email protected]
> Subject: Re: RE: [Pound Mailing List] strange performance
>
> Hi Joe,
>
>
> >1) Apply this patch:
> > http://goochfriend.org/pound/pound_2.6_SNI_Optimization.patch to
> >prevent some possibly unneeded SNI checks in SSL handshakes
> I´ve just made a test with the mentioned patch, but there is no
> difference in the behavior of the loadbalancer.
>
> 2) Investigate and change your Threads value. The default of 128 may
> be
> > your limiting factor. Experiment with more or fewer threads to
> > determine the best trade-off of performance and memory.
> Where can I change it ?
>
>
> Kind Regards
>
> fatcharly
>
> -------- Original-Nachricht --------
> > Datum: Wed, 8 Feb 2012 17:29:56 +0000
> > Von: Joe Gooch <[email protected]>
> > An: "\'[email protected]\'" <[email protected]>
> > Betreff: RE: [Pound Mailing List] strange performance
>
> > Kemp is purpose built, so I'd expect they've spent a lot of time with
> > custom performance tuning. Plus micro-benchmarks never really tell
> > the full story.
> >
> > For the numbers to mean anything you'd need to provide
> > 1) Is this SSL or non-SSL traffic?
> > 2) How many of these clicks are SSL handshakes - versus sessions that
> > are already established? SSL Handshakes are where the bulk of the CPU
> > load will come from.
> > 3) Are these clicks new TCP sessions or are they on a shared
> > connection(i.e. HTTP Keepalive)
> >
> > Recommendations for increasing your number:
> > 1) Apply this patch:
> > http://goochfriend.org/pound/pound_2.6_SNI_Optimization.patch to
> > prevent some possibly unneeded SNI checks in SSL handshakes
> > 2) Investigate and change your Threads value. The default of 128 may
> > be your limiting factor. Experiment with more or fewer threads to
> > determine the best trade-off of performance and memory.
> >
> >
> > I would bet increasing the Threads value will help in some regard...
> > Let me know how it goes please!
> >
> > Joe
> >
> > > -----Original Message-----
> > > From: [email protected] [mailto:[email protected]]
> > > Sent: Wednesday, February 08, 2012 12:02 PM
> > > To: [email protected]
> > > Subject: [Pound Mailing List] strange performance
> > >
> > > Hi,
> > >
> > > we are running a pound 2.6f with a patch v2 by Joe Gooch.
> > > When we start to stress our webserver via pound we get ~170000
> > > clicks, while the cpu of our pound-system /Xeon 3,0 GHz 1Gb RAM
> > > stays at about 40-50% (top). With the same test-setup but with a
> > > different SSL- Loadbalancer (KEMP), we get ~250000 clicks. It seems
> > > as if there is a barrier we can´t brake to get more clicks via the
> > > pound. Not the pound or the webservers seems to operate with a high
> load.
> > >
> > > Any suggestions are welcome
> > >
> > > Kind Regards
> > >
> > > fatcharly
> > >
> > > --
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> > >
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> > > Please contact [email protected] for questions.
>
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