> I'm running Suse Linux under Z/OS on an MP3000 system. We have > Tomcat V.4 running a custom servlet and performance is pretty bad. > We're running against a custom servlet that uses CORBA to fetch data > from our application on Z/OS, but the OS390 Linux seems to be pretty > CPU-intensive. I have 800 MB of RAM allocated with about 3GB of > DASD. RAM is OK but CPU is through the roof at about 500 users (I'm > using a test suite to simulate load). Any suggestions?
Steve: I am confused. The only way you could run Linux under z/OS is using the 3rd party ISX product. If so, talk to that vendor about performance. As supported by IBM, Linux only runs directly in an LPAR or as a guest of z/VM. I suspect you are running Linux for S/390 (note, not OS/390) in an LPAR alongside z/OS (or OS/390) in a separate partition. All that being said, the MP3000 is a pretty small system (especially if it is an H30) to run a large Java workload on. Do you have the JIT turned on? Regards, Jim Elliott - Linux Advocate, IBM Canada Ltd.
