JBoss Community

Sorry. I was using Jetty terminology. I meant connectors for handling web
requests. So if you are not using the AJP13 connector, comment it out if
it hasn't been already.

One thing about the servlet containers. I couldn't be sure that the
pre-built Tomcat and Jetty bundles are optimized so you may want to check.
It may mean you compile those separately from their source and then copy
over the necessary JARs into the JBoss bundle.

Best regards,

JonB.

> -----Original Message-----
> From: jboss-user-admin@...
> [mailto:jboss-user-admin@... Behalf Of Elankath,
> Tarun (Cognizant)
> Sent: Saturday, 30 August 2003 8:54 PM
> To: jboss-user@...
> Subject: RE: [JBoss-user] JBoss Performance Tuning Tips - a bit of an
> emergency
>
>
> Thanks for the tips Jon.
>
> I am going to start working on suggestions 1), 2), 4), 5) right
> away. The point on 3) looks interesting - hopefully I'll have
> time profile GC. 6) is out of my hands. I have already tried 7).
> I am not sure about 8) - what are the listeners you are referring
> to ? I My application doesn't make use of servlet listeners.
>
> Thanks for the tips - much appreciated!
> Tarun

Yes Bill,

We make use of a DAO layer and the MS-SQL JDBC Driver. And yes, I =
checked there are no connection leaks. We are returning everything to =
the pool.=20

I do know that the free MS-SQL JDBC Driver isn't good enough for =
production use and there are much better drivers available, but since =
this is a Proof-Of-Concept which is towards its closing stages, none of =
the 'higher-ups' are interested in purchasing a new driver.

I am just a junior programmer. :-( The best part is we are competing =
against Microsoft! (yes, the real MS) for this POC.

I am going to start on profiling the application and seeing whether I =
can come up with anything.

Thanks,
Tarun

-----Original Message-----
From: Bill Burke [mailto:bill@...]
Sent: Sunday, August 31, 2003 10:20 AM
To: jboss-user@...
Subject: Re: [JBoss-user] JBoss Performance Tuning Tips - a bit of an
emergency


So the application is entirely straight JDBC?

Stephen Davidson wrote:

> Elankath, Tarun (Cognizant) wrote:
>=20
>> Hi all,
>>
>> We have a small web + ejb application for a POC (Proof of Concept)=20
>> that is competing against a corresponding .NET application. We are=20
>> using Struts, 1 Stateful Session Bean, 1 Stateless Session Bean and=20
>> only 10 JSP pages. The application connects to a separate MS-SQL=20
>> database server.
>>
>> This application is being deployed in WebSphere, JBoss across Windows =

>> and Linux as the target servers.
>>
>> So far, JBoss is giving the worst results on a 1000 user stress test, =

>> which I am certain is ENTIRELY due to my inexperience with this=20
>> application server, and nothing whatsover to do with jboss.
>>
>> All performance tips on tuning jboss config parameters will be much=20
>> appreciated. I have done the following:
>> -increased ms and mx heap size
>> -increased connection pool size
>> -increase maxProcessor,minProcessor setting (for Tomcat)
>> -decreased session timeouts.
>> -made log level to ERROR in log4.xml
>>
>> I am still now sure on how to disable class reloading totally.
>>
>>
>> All tips/suggestions will be deeply appreciated. If JBoss performs=20
>> good, then our client would definitely prefer .Net to Java, just for=20
>> the cost factor.
>>
>> Regards,
>> Tarun
>>
>>
> Hi Tarun.
>=20
> At this point, I would recommend starting a profiler (I like =
Optimizeit,=20
> but there are others as well, pick your favorite), and seeing where =
the=20
> hangup is.  Because it sounds like you do have one.
>=20
> Some of the nastiest I ever found (was not in JBoss itself, but=20
> sometimes in code running on it) had to do with synchronized methods=20
> (especially a static synchronixed in an abstract base class).  A=20
> profiler would show if a method was getting stuck somewhere.
>=20
> Just a suggestion.
>=20
> Good luck,
> Steve

--=20
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
Bill Burke
Chief Architect
JBoss Group LLC.
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D



-------------------------------------------------------
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Welcome to geek heaven.
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I only have two connectors running - the Coyote connector and the AJP13 =
connector. I thought that the AJP connector was required if one wished =
to shutdown JBoss running in the background?



-----Original Message-----
From: Jon Barnett [mailto:jbarnett@...]
Sent: Saturday, August 30, 2003 10:41 PM
To: jboss-user@...
Subject: RE: [JBoss-user] JBoss Performance Tuning Tips - a bit of an
emergency


Sorry. I was using Jetty terminology. I meant connectors for handling =
web
requests. So if you are not using the AJP13 connector, comment it out if
it hasn't been already.

One thing about the servlet containers. I couldn't be sure that the
pre-built Tomcat and Jetty bundles are optimized so you may want to =
check.
It may mean you compile those separately from their source and then copy
over the necessary JARs into the JBoss bundle.

Best regards,

JonB.

> -----Original Message-----
> From: jboss-user-admin@...
> [mailto:jboss-user-admin@... Behalf Of Elankath,
> Tarun (Cognizant)
> Sent: Saturday, 30 August 2003 8:54 PM
> To: jboss-user@...
> Subject: RE: [JBoss-user] JBoss Performance Tuning Tips - a bit of an
> emergency
>
>
> Thanks for the tips Jon.
>
> I am going to start working on suggestions 1), 2), 4), 5) right
> away. The point on 3) looks interesting - hopefully I'll have
> time profile GC. 6) is out of my hands. I have already tried 7).
> I am not sure about 8) - what are the listeners you are referring
> to ? I My application doesn't make use of servlet listeners.
>
> Thanks for the tips - much appreciated!
> Tarun

Hi Steve,

I am going to start profiling our application. I wanted to check if I =
was missing any JBoss config parameters.

How about class reloading ? How does one disable it ?

Thanks,
Tarun


-----Original Message-----
From: Stephen Davidson [mailto:gorky@...]
Sent: Saturday, August 30, 2003 8:03 PM
To: jboss-user@...
Subject: Re: [JBoss-user] JBoss Performance Tuning Tips - a bit of an
emergency


Elankath, Tarun (Cognizant) wrote:
> Hi all,
>=20
> We have a small web + ejb application for a POC (Proof of Concept) =
that is competing against a corresponding .NET application. We are using =
Struts, 1 Stateful Session Bean, 1 Stateless Session Bean and only 10 =
JSP pages. The application connects to a separate MS-SQL database =
server.
>=20
> This application is being deployed in WebSphere, JBoss across Windows =
and Linux as the target servers.
>=20
> So far, JBoss is giving the worst results on a 1000 user stress test, =
which I am certain is ENTIRELY due to my inexperience with this =
application server, and nothing whatsover to do with jboss.
>=20
> All performance tips on tuning jboss config parameters will be much =
appreciated. I have done the following:
> -increased ms and mx heap size
> -increased connection pool size
> -increase maxProcessor,minProcessor setting (for Tomcat)
> -decreased session timeouts.
> -made log level to ERROR in log4.xml
>=20
> I am still now sure on how to disable class reloading totally.
>=20
>=20
> All tips/suggestions will be deeply appreciated. If JBoss performs =
good, then our client would definitely prefer .Net to Java, just for the =
cost factor.
>=20
> Regards,
> Tarun
>=20
>=20
Hi Tarun.

At this point, I would recommend starting a profiler (I like Optimizeit, =
but there are others as well, pick your favorite), and seeing where the =
hangup is.  Because it sounds like you do have one.

Some of the nastiest I ever found (was not in JBoss itself, but =
sometimes in code running on it) had to do with synchronized methods =
(especially a static synchronixed in an abstract base class).  A =
profiler would show if a=20
method was getting stuck somewhere.

Just a suggestion.

Good luck,
Steve
--=20
Java/J2EE Developer/Integrator
Co-Chair, Dallas/FortWorth J2EE Sig
214-724-7741





-------------------------------------------------------
This sf.net email is sponsored by:ThinkGeek
Welcome to geek heaven.
http://thinkgeek.com/sf
_______________________________________________
JBoss-user mailing list
JBoss-user@...
https://lists.sourceforge.net/lists/listinfo/jboss-user

AJP13 is used for web server <-> servlet container communication. You use
this with a JK/JK2 connector on the web server (mod_jk/mod_jk2 for Apache,
with similar connectors for IIS, iPlanet and so on). This allows the web
server to forward web requests to the back-end Tomcat or Jetty for
content. So if you don't have a front-end web server, don't enable the
AJP13 listener/connector.

Regards,

JonB.

> -----Original Message-----
> From: jboss-user-admin@...
> [mailto:jboss-user-admin@... Behalf Of Elankath,
> Tarun (Cognizant)
> Sent: Monday, 1 September 2003 3:48 PM
> To: jboss-user@...
> Subject: RE: [JBoss-user] JBoss Performance Tuning Tips - a bit of an
> emergency
>
>
> I only have two connectors running - the Coyote connector and the
> AJP13 connector. I thought that the AJP connector was required if
> one wished to shutdown JBoss running in the background?

I am sorry . I did know that the JK2 connector is used in Apache =
integration, but for some foggy reason I kept thinking that JBoss used =
that connector for administrative commands like Shutdown, etc.

Anyhow, one more service removed. Thanks.

-----Original Message-----
From: Jon Barnett [mailto:jbarnett@...]
Sent: Monday, September 01, 2003 12:08 PM
To: jboss-user@...
Subject: RE: [JBoss-user] JBoss Performance Tuning Tips - a bit of an
emergency


AJP13 is used for web server <-> servlet container communication. You =
use
this with a JK/JK2 connector on the web server (mod_jk/mod_jk2 for =
Apache,
with similar connectors for IIS, iPlanet and so on). This allows the web
server to forward web requests to the back-end Tomcat or Jetty for
content. So if you don't have a front-end web server, don't enable the
AJP13 listener/connector.

Regards,

JonB.

> -----Original Message-----
> From: jboss-user-admin@...
> [mailto:jboss-user-admin@... Behalf Of Elankath,
> Tarun (Cognizant)
> Sent: Monday, 1 September 2003 3:48 PM
> To: jboss-user@...
> Subject: RE: [JBoss-user] JBoss Performance Tuning Tips - a bit of an
> emergency
>
>
> I only have two connectors running - the Coyote connector and the
> AJP13 connector. I thought that the AJP connector was required if
> one wished to shutdown JBoss running in the background?

Elankath, Tarun (Cognizant) wrote:
> Hi Steve,
> 
> I am going to start profiling our application. I wanted to check if I was missing any JBoss config parameters.
> 
> How about class reloading ? How does one disable it ?
> 
> Thanks,
> Tarun
> 

Hi Taurun.

Umm, the only problem I ever had with the classloaders was a (very old, and long since closed) bug causing the initial classloading to fail, and some issues with hot redeploy that crop up periodically with the different 
versions.  Once these issues had been fixed, I never not had to look at this issue, and class reloading never showed up in of my tests as a bottle neck.

Bottom line, I never had to disable class reloading, so I don't know to.  I remember Scott mentioning something about some setting in one of the config files a way back, but I would not know if that information was valid for 
current versions.

Regards,
Steve

-- 
Java/J2EE Developer/Integrator
Co-Chair, Dallas/FortWorth J2EE Sig
214-724-7741