On Mon, 26 Jul 2010 10:24:06 -0500, Daniel Tate <[email protected]> wrote: > At this point i see two problems: > > 1) Why is OOM Kill not functioning properly > 2) Why is websphere performance so awful?
If you run WAS (or any Java app) in swap, performance will be terrible, as a rule of thumb; if you've got 16GB allocated to your JVM heaps (for example), and 10GB for the guest, you're going to see terrible performance sooner or later. (A secondary issue is that Z9 processors are, in my experience, much slower than a modern x86 processor, so if you're expecting a Z9 IFL to offer comparable performance to a Xeon, you are going to be very sadly disappointed.) As far as OOM goes I've seen this situation on zVM guests, usually with Oracle, in the past, and put it down to the VDISK swap being just fast enough that the OOM killer is never triggered, even though the system is unusable. That's just theory on my part, though. ---------------------------------------------------------------------- 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 more information on Linux on System z, visit http://wiki.linuxvm.org/
