Hi,
I would like to bring up the issue that even if I use lastest JRE1.3. The
problem still exists. AND even if I load test a
jsp file which contains nothing to execute. The problem still exists. So, I guess
that:
1. If the mod_jk is compiled with -DEAPI and you are using ajp13. There is
still memory leak.
2. But if you compile it without -DEAPI, the java heap seems to be constant
for that. However, I don't know why the
allocated memory for the JVM still increases.
Thx. and Regards.
Steve.
-----Original Message-----
From: hanasaki [mailto:[EMAIL PROTECTED]]
Sent: Saturday, March 02, 2002 12:10 AM
To: Tomcat Users List
Subject: Re: Jetty .vs. tomcat
Just a thought. Try the most current Production JDK (1.4) and the most
current Tomcat (4+). That JDK version is a bit old. I am not preaching
"always do the latest and greatest" or "Use Beta Stuff in Prod".
Also, It might not hurt to check your code. It is possible to introduce
a "memory leak" in your own code by accidently maintaining a reference
to objects you no longer use. If the ref count never goes to zero, it
will never be scheduled for GC.
Steve Wong wrote:
> Hi mingfai,
>
> I am trying other application servers because I have some problems using
>tomcat in a production environment.
>
> The environment is Solaris 8, JRE1.2.2, tomcat3.3, Apache1.3.23 with mod_ssl
>and mod_jk.
> What I discovered is that when I use apache benchmark tool(ab) to generate
>many requests on apache, the java heap allocated
> in tomcat continuously increases. Up to a point that there is OutOfMemoryError.
> If I generate the requests on tomcat instead, there is no problem.
> I am using the OptimizeIt to see the above result.
>
> And What I can find in cvs log of mod_jk is that there was a memory leak bug
>in May last year. But this bug is said to be fixed.
> If I use Apache1.3.23 without mod_ssl, I find that the java heap remains
>stable. However, I discovered that the allocated memory
> of the java process of tomcat continuously increases. Because I am afraid that
>there will be OutOfMemeryError in the production
> environment. So, I restart the tomcat process regularly.
>
> Have you discovered the same things for your web application??
>
> Thx. and Regards.
> Steve.
>
> -----Original Message-----
> From: Ming Fai [mailto:[EMAIL PROTECTED]]
> Sent: Friday, March 01, 2002 4:05 PM
> To: Tomcat Users List
> Subject: RE: Jetty .vs. tomcat
>
>
> hi Steve,
>
> I'm a Tomcat user. from what I read on the web, I believe Jetty does
> outperform Tomcat significantly in static pages and also outperform Tomcat
> to a unknown degree in dynamic pages. so, why i still choose Tomcat?
>
> My main consideration is in scalability. Multiple instance of Tomcat can be
> run and load balanced with Apache and mod_jk. I believe it can achieve a
> very high scalability in handling simultanceous requests. Other
> considerations are: good integration with other Apache and commercial
> products, better support (i personally think the 'support' from Apache group
> is better than other open src groups), full implementation of JCP
> specification etc.
>
> And Tomcat should not be used together with Apache if there is heavy loading
> of static pages.
>
> Other than Tomcat and Jetty, Resin is also quite famous. And there are other
> commercial choice like WebLogic, JRun and Orion. You should make decision
> base on your need.
>
> In my opinion, if your site is small in scale, and requires a very good
> response time, then Jetty or Resin are your choice. Otherwise, Tomcat is a
> good choice in general and it is a proven product. It occupies about 50% of
> the servlet engine market as of mid 2001.
> (http://www.devx.com/judgingjava/articles/sixyears/printable/sixyearsp2.asp#
> fig7)
>
> Any comment are welcome!
>
> Regards,
> mingfai
>
>
>
>
>
>
>
>>-----Original Message-----
>>From: Steve Wong [mailto:[EMAIL PROTECTED]]
>>Sent: Friday, March 01, 2002 3:17 PM
>>To: [EMAIL PROTECTED]
>>Subject: Jetty .vs. tomcat
>>
>>
>>
>> How will you compare jetty with tomcat?
>> Which one will you choose for a production environment? Why?
>> Any Performance figures about these 2 servlet containers?
>>
>>Thx. and Regards.
>>Steve.
>>
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