Apparently it's very easy to write java code that is less than efficient! You just notice it more under z because you typically look and you typically don't have your own dedicated machines. Do you have tools on your Java to drill down to where the application is spending all it's time? Wily Introscope and JPROBE are two examples.
Our app folks first pointed to infrastructure (z HW and VM). Then networking... All of that was examined, tuned, and tweaked. No major improvements. Then they starting bringing in the IBM java experts. Gave them back about an order of magnitude (20+ IFL projected down to a respectable 2 point something). Problem is that you probably won't be able to tell them that. Luckily IBM had done the initial sizing here :) Marcy Cortes "This message may contain confidential and/or privileged information. If you are not the addressee or authorized to receive this for the addressee, you must not use, copy, disclose, or take any action based on this message or any information herein. If you have received this message in error, please advise the sender immediately by reply e-mail and delete this message. Thank you for your cooperation." -----Original Message----- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of Dave Jones Sent: Thursday, April 20, 2006 12:52 PM To: [email protected] Subject: Re: [LINUX-390] IBM java options for Weblogic under zseries linux Ann, take a look at this web site: http://www.velocity-software.com/ They seem to have a handle on Linux performance issues under VM. DJ Smith, Ann (ISD, IT) wrote: > We currently are running a Weblogic POC - Weblogic 81. SP4 with SLES9 > under z/VM. > The customers currently run the applications on SUN Solaris and use > some SUN java hotspot options. > Does anyone have suggestions or know where I can find doc on IBM java > options to help performance when running Weblogic under zseries linux? > > > > ********************************************************************** > *** This communication, including attachments, is for the exclusive > use of addressee and may contain proprietary, confidential and/or > privileged information. If you are not the intended recipient, any > use, copying, disclosure, dissemination or distribution is strictly > prohibited. If you are not the intended recipient, please notify the > sender immediately by return e-mail, delete this communication and > destroy all copies. > ********************************************************************** > *** > > > ---------------------------------------------------------------------- > 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
