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Posted to users@tomcat.apache.org by Alvaro Seixas <al...@hotmail.com> on 2001/11/08 18:38:20 UTC
Tomcat Capacity
Hello,
Could anyone tell me how many transactions Tomcat supports simultaneously?
Thnaks,
Alvaro
Re: Tomcat Capacity
Posted by "Craig R. McClanahan" <cr...@apache.org>.
There is absolutely no way to answer this question accurately. It depends
on ALL of the following factors (plus some more that I probably haven't
thought of):
* How much memory you have
* How much of that memory you allocate to Tomcat
* How much CPU power (and how many CPUs) you have
* Which JVM you are running
* Which OS you are running
* What application you are running, and what it does
* How many requests per second your users generate
One useful source of information is benchmarks on thread handling and
message throughput for a variety of OS/JVM combinations -- the results
vary *dramatically*. Volano (makers of Volano Chat, which is an app quite
sensitive to this kind of thing) regularly runs a series of tests, and
reports the results at <http://www.volano.com/benchmarks.html>.
Servlet containers have similar (but by no means identical) resource
requirements to a chat server, but performance tends to be dominated by
your application, not by the container. For example, if your app requires
a database query that takes ten seconds every time, it's not going to
matter how many users the servlet container can support -- people will
quickly get frustrated and abandon your app.
Craig
On Thu, 8 Nov 2001, Alvaro Seixas wrote:
> Date: Thu, 8 Nov 2001 15:38:20 -0200
> From: Alvaro Seixas <al...@hotmail.com>
> Reply-To: Tomcat Users List <to...@jakarta.apache.org>
> To: Tomcat List <to...@jakarta.apache.org>
> Subject: Tomcat Capacity
>
> Hello,
>
> Could anyone tell me how many transactions Tomcat supports simultaneously?
>
> Thnaks,
>
> Alvaro
>
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Re: j_security_check & mod_webapp
Posted by Thierry Delaitre <de...@cpc.wmin.ac.uk>.
> > Hi,
> >
> > I've successfuly recompiled mod_webapp on Solaris 7 and installed the
> > module with Apache 1.3. Everything works fine except that when I tried to
> > use form based authentication with j_security_check I cannot login when
> > connecting through mod_webapp. It is ok when connecting directly to tomcat
> > using tomcat's web server.
> >
> > Do I need to add something extra to the apache config file to get
> > j_security_check work when using mod_webapp ?
> >
> > Thanks,
> >
> > Thierry.
> >
> > WebAppConnection mathilde warp grizzly:8008
> > WebAppDeploy examples mathilde /examples
>
> Weird... There are some tests in Watchdog/Tomcat-tester to check for that
> exactly, and those pass w/ no problems with webapp... Must be a some sort of
> configuration issue (did you copy your realm definition also in <Service
> name="tomcat-Apache"> ???)
Thanks. I copied the realm definition and it now works fine !
Thierry.
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Re: j_security_check & mod_webapp
Posted by Pier Fumagalli <pi...@betaversion.org>.
Thierry Delaitre at delaitt@cpc.wmin.ac.uk wrote:
>
> Hi,
>
> I've successfuly recompiled mod_webapp on Solaris 7 and installed the
> module with Apache 1.3. Everything works fine except that when I tried to
> use form based authentication with j_security_check I cannot login when
> connecting through mod_webapp. It is ok when connecting directly to tomcat
> using tomcat's web server.
>
> Do I need to add something extra to the apache config file to get
> j_security_check work when using mod_webapp ?
>
> Thanks,
>
> Thierry.
>
> WebAppConnection mathilde warp grizzly:8008
> WebAppDeploy examples mathilde /examples
Weird... There are some tests in Watchdog/Tomcat-tester to check for that
exactly, and those pass w/ no problems with webapp... Must be a some sort of
configuration issue (did you copy your realm definition also in <Service
name="tomcat-Apache"> ???)
Pier
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j_security_check & mod_webapp
Posted by Thierry Delaitre <de...@cpc.wmin.ac.uk>.
Hi,
I've successfuly recompiled mod_webapp on Solaris 7 and installed the
module with Apache 1.3. Everything works fine except that when I tried to
use form based authentication with j_security_check I cannot login when
connecting through mod_webapp. It is ok when connecting directly to tomcat
using tomcat's web server.
Do I need to add something extra to the apache config file to get
j_security_check work when using mod_webapp ?
Thanks,
Thierry.
WebAppConnection mathilde warp grizzly:8008
WebAppDeploy examples mathilde /examples
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