Unfortunately, zAAP doesnt help us. IBM came out with it three months after we bought our z800, and it only works on a z890 or z990, so we're not likely to see any benefits from that for a few years.
"An Optimist is just a pessimist with no job experience." - Scott Adams Gordon W. Wolfe, Ph.D. Boeing Enterprise Servers 425-865-5940 > ---------- > From: Ledbetter, Scott E > Reply To: Linux on 390 Port > Sent: Friday, June 18, 2004 11:25 AM > To: [EMAIL PROTECTED] > Subject: Re: J2EE performance? > > I think IBM recognizes that JAVA is a bit of a hog on zSeries, which is why > they have come out with the zAAP features, which are basically JAVA > coprocessors for zSeries 890 and 990. > > No support for Linux yet, as far as I know. Maybe a future? > > http://www-1.ibm.com/servers/eserver/zseries/zaap/ > > Scott L. > > > > -----Original Message----- > From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of > Brandon Darbro > Sent: Friday, June 18, 2004 12:11 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
