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From song yantao <>
Subject Re: AW: Re: Help, My Tomcat always down everyday!
Date Thu, 20 Sep 2001 13:19:16 GMT
>As long as you don't have used packages com.sun.* there should be 
>no difference between diffent vendors.
>If you try IBM's and Sun's JDK this is true to more than 99.99 
>(as far as we know). What differs are the implementation bugs in the VM
>or some implementation bugs in the libraries.
>We have running our application under both VM's and had to change
>nothing for this. (70K lines of java code + several hundred jsp files)
>In rare (an unclear) conditions we get core dumps with both of them.
>Sun's JDK crashes 2 to 3 times less than IBM's in our environment
>with the given application (We don't use tomcat yet), in an other
Which software are u using? WebLogic?
>environments or with other applications the resulty may vary.
>> -----Urspr√ľngliche Nachricht-----
>> Von: song yantao []
>> Gesendet: Mittwoch, 19. September 2001 20:00
>> An:
>> Betreff: Re: Re: Help, My Tomcat always down everyday!
>> >On Thu, 20 Sep 2001 17:53:42 +0800
>> >akilus <> wrote:
>> >
>> Thanks for your help, I used JDK1.3.1 and JDK1.3.0, the two 
>> JDKs have the same problem.
>> I will try JDK1.2.2 now, and see whether it have this problem or not.
>> If JDK1.2.2 is the same for me, maybe the tomcat have some 
>> problem with JDK. 
>> But I dont want to use IBM JVM now, because I'm not familiar 
>> with them, and I don't know whether I need to modify my jsp 
>> program or not if I change to IBM JVM, because our program 
>> utilize some functions of JDK and other packages from SUN.
>> >> > 
>> >> Thanks for your reply, but I use JSDK1.3.0.04, not 1.3.1, 
>> and do you found the same problem of my JVM?
>> >
>> >Not tried it, sorry.
>> >
>> >> Such like this, when I restart tomcat, JAVA occupy 14M 
>> memory, after some times, JAVA occupy 23M or more Memory, do 
>> you have this problem? The memory of JAVA increased by time!!!
>> >
>> >This is normal.  By default the JVM will use up 64M without 
>> releasing memory back to the OS.  You can set the maximum and 
>> minimum amount of memory the JVM uses uses command line 
>> parameters to the java command (see the documentation for the 
>> 'java' command)
>> >
>> >> I 'm not familiar with IBM JVM,where can I found IBM JVM? 
>> >
>> >
>> >
>> >> And will it work good with tomcat? will IBM JVM have all 
>> functions of JDK JVM?
>> >
>> >I'm using it and "it works for me"  ;o)
>> >
>> >
>> >--
>> >simon colston
>> >
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