RE: Initial JDBC Hits to AS/400 DB using Tomcat is Very Slow?

Cool...  Thanks for the information Patrick.

Chad


-----Original Message-----
From: Patrick L Archibald [mailto:Patrick.Archibald@xxxxxxxxxxxxx] 
Sent: Tuesday, December 16, 2003 8:03 AM
To: Java Programming on and around the iSeries / AS400
Subject: Re: Initial JDBC Hits to AS/400 DB using Tomcat is Very Slow?

Chad 

QJVAEXEC is the job name I see when my JSP pages are being compiled. It
doesn't really tell you anything. It just kinda confirms that JSP page
compilation is the cause of your slow down. Job QJVAEXEC is probably used
for some other things too but if it kicks in during the wait on your first
hit and it is sucking up some CPU then that is what is going on. 

Thanx, PLA



cornelius, chad wrote:

>Patrick,
>
>It is a jsp page.  I don't know much about the 400 commands.  What does
>QJVAEXEC tell you?
>
>Thanks,
>Chad
>
>
>-----Original Message-----
>From: Patrick L Archibald [mailto:Patrick.Archibald@xxxxxxxxxxxxx] 
>Sent: Tuesday, December 16, 2003 7:45 AM
>To: Java Programming on and around the iSeries / AS400
>Subject: Re: Initial JDBC Hits to AS/400 DB using Tomcat is Very Slow?
>
>Is it a servlet or a jsp page? If it is a jsp page the delay may be the 
>compilation of the jsp page into the servlet.  Look for a jobs called 
>QJVAEXEC with WRKSYSACT in automatic refresh mode when you first access 
>the page. (You may not have WRKSYSACT. I think it is part of Performance 
>tools. If so, use WRKACTJOB instead.)  JSP page compilation is my 
>biggest performance hit.
>
>Thanx, PLA
>
>cornelius, chad wrote:
>
>  
>
>>Does anyone know what would cause initial JDBC hits on an AS/400 DB to
>>perform slowly using Tomcat?  I have setup Tomcat to use connection
pooling
>>just as David suggests in his article, "Tomcat on iSeries", which is very
>>good by the way.  I have compiled all the .jar files, but Tomcat still
>>performs slowly on the first hits.  Our AS/400's shutdown nightly to
>>    
>>
>perform
>  
>
>>backups, so I am not sure if this is the cause.  After one hit is made to
a
>>table, all other hits are very fast.  It's just the first hit in the
>>morning.  My other thought is that we do not have the SQL package on our
>>AS/400, which allows you to perform the STRSQL command.  Would this be
>>another reason?  It seems JDBC would be independent of that.  Does anyone
>>have any suggestions?  Any help would be greatly appreciated.
>>
>>
>>
>>Thanks,
>>
>>Chad
>>
>>
>>
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>>
>> 
>>
>>    
>>
>
>
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