Same thing here, The developers were trying to compare a Sun Box to the Frame and found there application was running 2.5 times slower on the frame, and I was using an IFL on a z-800. The Application was a numeric intensive application using JBoss.
Larry Davis -----Original Message----- From: Antônio Pires de Castro Júnior. [mailto:[EMAIL PROTECTED] Sent: Monday, June 21, 2004 09:38 AM To: [EMAIL PROTECTED] Subject: Re: J2EE performance? I had the same problem with J2EE applications using a JBoss in Linux for s390. []4s, Antonio. ----- Original Message ----- From: "David Booher" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Monday, June 21, 2004 10:28 AM Subject: Re: J2EE performance? Brandon, I feel your pain. We have a z800-0X2 and even when DEDICATEing an entire processor (roughly 80 MIPS) to a single VM guest (Linux or z/OS) running WebSphere we see TERRIBLE performance. It consumes the entire 80 MIPS for several minutes during WebSphere initialization and then the demo app, PetStore, runs very very slowly. Plant Store is not much better. I'm from the old school, and 80 MIPS is a LOT, I mean, A LOT of processor power to throw at an App Server. WebSphere is no CICS, that's for sure! David Booher, Systems Programmer Quest Software 4320 Winfield Rd, Suite 500 Warrenville, IL 60555 630.836.3196 http://www.quest.com -----Original Message----- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] Behalf Of Brandon Darbro Sent: Friday, June 18, 2004 1:11 PM To: [EMAIL PROTECTED] Subject: J2EE performance? I've had the opportunity to play with JBOSS recently, as well as watch some Websphere testing on our linux guests, and I'm not very happy with the performance and resource utilization. Let's see... what can I tell you about our system: * z800 * 2 IFL's (tested using single and dual, still slow) in LPAR * z/VM 4.4.0 * guest lan networking * 256 meg RAM * 512 meg vdisk swap Observations: * Turning of hz_timer patch helps lower CPU utilization footprint of the java processes, but of course, then the system never sleeps. * When running a J2EE app, it takes often over a minute to finish rendering a page to a browser. * When running a J2EE app, java consumes an entire IFL of cpu if we let it. I understand others are successfully running J2EE implimentations on mainframe Linux, so here are my questions: 1. Is J2EE a cpu resource hog for you? 2. Are you running Linux under VM or right on the LPAR? 3. Do you charge users for MIP usage? If so, how does this high CPU utilization not eat your customer alive in billed costs? 4. Does anyone have some advice on how to run J2EE services more efficiently, faster and easier on cpu? 5. Which J2EE server software for mainframe Linux do you prefer and why? 6. Lastly, why would you choose to run J2EE on mainframe Linux as apposed to some stand-alone system (Unix, Windows, Other)? Thanks folks, *Brandon Darbro ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
