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Posted to users@tomcat.apache.org by José Manuel Molina Pascual <ra...@gmail.com> on 2006/09/05 15:34:52 UTC
Low performance with Tomcat APR
Hello, I just installed Tomcat APR on a SUSE 9 and found that the
performance has fallen dramatically (I fact, performance with APR it's
half than without it!!!!).
I followed the instructions of the Tomcat Documentation.
I suppose that this must be some configuration issue.
I'm using Apache APR 1.2.7, OpenSSL 0.9.7d and Tomcat 5.5.17.
Thanks in advance.
--
Peace Sells.......... But Who's Buying?
When all you have is a hammer, everything looks like a nail.
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Re: Low performance with Tomcat APR
Posted by José Manuel Molina Pascual <ra...@gmail.com>.
I'm using 2.6
On 9/5/06, Andrew Miehs <an...@2sheds.de> wrote:
>
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> Which kernel are you using? 2.6 or 2.4?
>
> Andrew
>
> On 05/09/2006, at 3:34 PM, José Manuel Molina Pascual wrote:
>
> > Hello, I just installed Tomcat APR on a SUSE 9 and found that the
> > performance has fallen dramatically (I fact, performance with APR it's
> > half than without it!!!!).
> >
> > I followed the instructions of the Tomcat Documentation.
> >
> > I suppose that this must be some configuration issue.
> >
> > I'm using Apache APR 1.2.7, OpenSSL 0.9.7d and Tomcat 5.5.17.
> >
> > Thanks in advance.
> >
> > --
> > Peace Sells.......... But Who's Buying?
> >
> > When all you have is a hammer, everything looks like a nail.
> >
> > ---------------------------------------------------------------------
> > To start a new topic, e-mail: users@tomcat.apache.org
> > To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> > For additional commands, e-mail: users-help@tomcat.apache.org
> >
>
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>
--
Peace Sells.......... But Who's Buying?
When all you have is a hammer, everything looks like a nail.
Re: Low performance with Tomcat APR
Posted by Andrew Miehs <an...@2sheds.de>.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Which kernel are you using? 2.6 or 2.4?
Andrew
On 05/09/2006, at 3:34 PM, José Manuel Molina Pascual wrote:
> Hello, I just installed Tomcat APR on a SUSE 9 and found that the
> performance has fallen dramatically (I fact, performance with APR it's
> half than without it!!!!).
>
> I followed the instructions of the Tomcat Documentation.
>
> I suppose that this must be some configuration issue.
>
> I'm using Apache APR 1.2.7, OpenSSL 0.9.7d and Tomcat 5.5.17.
>
> Thanks in advance.
>
> --
> Peace Sells.......... But Who's Buying?
>
> When all you have is a hammer, everything looks like a nail.
>
> ---------------------------------------------------------------------
> To start a new topic, e-mail: users@tomcat.apache.org
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
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N8wWBqgIRWfizB0ttVxkKl0=
=/g93
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Re: Low performance with Tomcat APR
Posted by Mladen Turk <ml...@jboss.com>.
José Manuel Molina Pascual wrote:
> Hi, Mladen.
> That's exactly what we expected, about 10% improvement.
>
> We are runnning a cluster of 4 tomcats and we have a stress test batery
> , I'm not sure of how manu concurrent users it simulates, maybe that's
> the point.
>
Of course it is.
When the concurrency goes over the maxThreads/2 then APR
starts behaving like non-blocking, that might cause degradation
when you have artificial clients like some request bomber.
>
> I've received new test data, when the tests are launched agaist only
> one tomcat (no cluster) it serves 4100 requests x per sencond, and
> when the four machines are running it only serves 4800!!!!.
>
Perhaps you have reached maximum network bandwidth.
What is the transfer rate (MB/Sec). For a 100MBps
the maximum theoretical throughput is 12.5 MB/sec.
With 4800 req/sec looks like you have 2.6K test page.
(Of course if this is 100MBps network).
For 1GBps network the troughput is cca. 60 MB/sec.
Regards,
Mladen.
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Re: Low performance with Tomcat APR
Posted by José Manuel Molina Pascual <ra...@gmail.com>.
Hi, Mladen.
That's exactly what we expected, about 10% improvement.
We are runnning a cluster of 4 tomcats and we have a stress test batery
, I'm not sure of how manu concurrent users it simulates, maybe that's
the point.
I've received new test data, when the tests are launched agaist only
one tomcat (no cluster) it serves 4100 requests x per sencond, and
when the four machines are running it only serves 4800!!!!.
> I had SUSE9/x86_64, and it performs 10-20% faster then a
> regular connector. Of course, when you have a real web
> server and >100 concurrent clients with http/1.1
>
> How did you figure out that the performance is twice
> lower the with the regular Tomcat?
>
> Regards,
> Mladen.
>
> ---------------------------------------------------------------------
> To start a new topic, e-mail: users@tomcat.apache.org
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
>
--
Peace Sells.......... But Who's Buying?
When all you have is a hammer, everything looks like a nail.
---------------------------------------------------------------------
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Re: Low performance with Tomcat APR
Posted by Mladen Turk <ml...@jboss.com>.
José Manuel Molina Pascual wrote:
> Hello, I just installed Tomcat APR on a SUSE 9 and found that the
> performance has fallen dramatically (I fact, performance with APR it's
> half than without it!!!!).
>
> I followed the instructions of the Tomcat Documentation.
>
Great.
> I suppose that this must be some configuration issue.
>
Probably.
> I'm using Apache APR 1.2.7, OpenSSL 0.9.7d and Tomcat 5.5.17.
>
I had SUSE9/x86_64, and it performs 10-20% faster then a
regular connector. Of course, when you have a real web
server and >100 concurrent clients with http/1.1
How did you figure out that the performance is twice
lower the with the regular Tomcat?
Regards,
Mladen.
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Re: Low performance with Tomcat APR
Posted by Filip Hanik - Dev Lists <de...@hanik.com>.
if (your max nr of open connections) < Connector.maxThreads ) then
the regular connector is better, and will always be as it is using
blocking IO
else
APR will scale better, as it can keep a larger set of keep alive
connections open
end
Your biggest gain on the APR connector is if you are using Tomcat SSL,
its probably 20 times faster (if not more) than the java blocking connector.
There is a bug in APR SSL handshaking that was fixed recently and is
available in
http://people.apache.org/~fhanik/v5.5.18-beta-1/
Filip
José Manuel Molina Pascual wrote:
> Hello, I just installed Tomcat APR on a SUSE 9 and found that the
> performance has fallen dramatically (I fact, performance with APR it's
> half than without it!!!!).
>
> I followed the instructions of the Tomcat Documentation.
>
> I suppose that this must be some configuration issue.
>
> I'm using Apache APR 1.2.7, OpenSSL 0.9.7d and Tomcat 5.5.17.
>
> Thanks in advance.
>
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