Hi,
Lots of CPU activity could in some cases point to a memory problem
where the garbage collector is getting run a lot because the server is
very near memory exhaustion. Try monitoring memory usage and gc cycles
with the usual tools (jvisualvm, jstat) and work from there. I'm sure
there's a guide from sun somewhere on their site.
regards,
Wim
On Tue, Jul 14, 2009 at 12:30 PM, Lasantha
Pambagoda<lpambag...@gmail.com> wrote:
> Dear Dave,
>
> We are using JBoss Application Server of 4.2.3 GA release.
>
> Best Regards
> Lasantha
>
> On Tue, Jul 14, 2009 at 2:18 PM, Dave Newton<newton.d...@yahoo.com> wrote:
>> I may have missed it, but providing the server you're using would be
>> helpful.
>>
>> Dave
>>
>> Lasantha Pambagoda wrote:
>>>
>>> Dear Martin,
>>>
>>> Thanks for your link, We have went through the document and here are
>>> the description on each item described in document.
>>>
>>> 1) Turn off logging and devMode - Already done this.
>>> 2) Use the Java Templates - Since we are not using struts tags this is
>>> not applicable (right now we are only using struts only fore
>>> dispatching purpose, our jsp's only use plain "c:out" tags).
>>> 3) Do not use interceptors you do not need. - We are not using any
>>> struts interceptors.
>>> 4) Use the correct HTTP headers (Cache-Control & Expires) - We are not
>>> using browser caching for html generated from JSP.
>>> 5) Copy the static content from the Struts 2 jar when using the Ajax
>>> theme (Dojo) or the Calendar tag - We are not using ajax theme or
>>> calendar tag.
>>> 6) Create a freemarker.properties file in your WEB-INF/classes
>>> directory - We are not using Freemarker
>>> 7) Enable Freemarker template caching - We are not using freemaker
>>> 8) When overriding a theme, copy all necessary templates to the theme
>>> directory - We are not overriding themes.
>>> 9) Do not create sessions unless you need them - We are not creating
>>> sessions using struts2.
>>> 10) When using Freemarker, try to use the Freemarker equivalent rather
>>> than using the JSP tags - We are not using any Freemarker
>>> functionalities.
>>>
>>> As further explanation we are only using sturs2 only for dispatching
>>> purposes, Our action classes are simple like this.
>>>
>>> @Namespace(S2Constants.Namespace.PRIVATE)
>>> @Results ( {
>>> �...@result(name=S2Constants.Result.SUCCESS,
>>> value=S2Constants.Jsp.MY_SUCCESS_JSP_FILE),
>>> �...@result(name=S2Constants.Result.ERROR,
>>> value=S2Constants.Jsp.MY_ERROR_JSP_FILE)
>>> })
>>> public class MyAction implements ServletRequestAware {
>>>
>>> protected HttpServletRequest request;
>>>
>>> public void setServletRequest(HttpServletRequest request) {
>>> this.request = request;
>>> }
>>>
>>> public String execute() {
>>> return MyRequestHandler.execute(request);
>>> }
>>> }
>>>
>>> And out struts.xml file is like this.
>>>
>>> <struts>
>>>
>>> <constant name="struts.enable.DynamicMethodInvocation" value="true" />
>>> <constant name="struts.devMode" value="false" />
>>> </struts>
>>>
>>> Finally here is the web.xml configurations
>>>
>>>
>>> <filter>
>>> <filter-name>struts2</filter-name>
>>>
>>> <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
>>> <init-param>
>>> <param-name>config</param-name>
>>>
>>> <param-value>struts-default.xml,struts-plugin.xml,resources/struts2/struts.xml</param-value>
>>> </init-param>
>>> <init-param>
>>> <param-name>actionPackages</param-name>
>>>
>>> <param-value>com.myapplication.core.web.action</param-value>
>>> </init-param>
>>> </filter>
>>>
>>>
>>> <filter-mapping>
>>> <filter-name>struts2</filter-name>
>>> <url-pattern>*.action</url-pattern>
>>> <dispatcher>REQUEST</dispatcher>
>>> <dispatcher>FORWARD</dispatcher>
>>> </filter-mapping>
>>>
>>>
>>> Additionally we have added two more servers in to our production
>>> servers to avoid overloading. But still its getting overloaded time to
>>> time. Same application before struts2 migration we managed to keep the
>>> system in good health with two servers. (now we are having 4 servers
>>> load balanced by hardware load balancer)
>>>
>>> Really appreciate if anyone can help regarding this struts2 CPU
>>> utilization issue.
>>>
>>> Best Regards
>>> Lasantha
>>>
>>>
>>> On Mon, Jul 13, 2009 at 6:56 PM, Martin Gainty<mgai...@hotmail.com> wrote:
>>>>
>>>> take a look at tuning tips described at
>>>> http://cwiki.apache.org/WW/performance-tuning.html
>>>>
>>>> ping back for questions/concerns
>>>> Martin
>>>> ______________________________________________
>>>> Verzicht und Vertraulichkeitanmerkung
>>>>
>>>> Diese Nachricht ist vertraulich. Sollten Sie nicht der vorgesehene
>>>> Empfaenger sein, so bitten wir hoeflich um eine Mitteilung. Jede unbefugte
>>>> Weiterleitung oder Fertigung einer Kopie ist unzulaessig. Diese Nachricht
>>>> dient lediglich dem Austausch von Informationen und entfaltet keine
>>>> rechtliche Bindungswirkung. Aufgrund der leichten Manipulierbarkeit von
>>>> E-Mails koennen wir keine Haftung fuer den Inhalt uebernehmen.
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>> Date: Mon, 13 Jul 2009 06:31:34 -0700
>>>>> From: tajuddi...@yahoo.com
>>>>> Subject: Re: Migration from Struts1 to Struts2
>>>>> To: user@struts.apache.org
>>>>>
>>>>> I'm not sure but do pls check out by including the sitemesh-2.3.jar file
>>>>> and xwork-2.0.6.jar file in your library
>>>>>
>>>>> --- On Mon, 7/13/09, Lasantha Pambagoda <lpambag...@gmail.com> wrote:
>>>>>
>>>>>
>>>>> From: Lasantha Pambagoda <lpambag...@gmail.com>
>>>>> Subject: Migration from Struts1 to Struts2
>>>>> To: user@struts.apache.org
>>>>> Date: Monday, July 13, 2009, 6:33 AM
>>>>>
>>>>>
>>>>> Hi,
>>>>>
>>>>> We have migrated struts1 application to struts2. But now once we
>>>>> deployed the system the CPU is going 90% to 100% and system is getting
>>>>> loaded. In JSP's we are not using struts specific tags or freemaker
>>>>> templates. Our JSP files are just plain jsp files only with
>>>>> requstScope variables.
>>>>>
>>>>> We are using following versions of struts and dependent libraries.
>>>>>
>>>>> struts2-core-2.1.6.jar
>>>>> struts2-codebehind-plugin-2.1.6.jar
>>>>> ognl-2.6.11.jar
>>>>> freemarker-2.3.13.jar
>>>>>
>>>>> Please let me know if we can do any improvement with out switching
>>>>> back to struts1
>>>>>
>>>>> Kind Regards
>>>>> Lasantha
>>>>>
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>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>> _________________________________________________________________
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>>>>
>>>> http://www.bing.com/travel/deals/airline-ticket-deals.do?form=MTRHPG&publ=WLHMTAG&crea=TXT_MTRHPG_Travel_Travel_TravelDeals_1x1
>>>
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>>>
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