On Wed, Jun 23, 2010 at 4:46 PM, Mrohs, Ray <[email protected]> wrote:
> The cache number looks interesting because it remains large while swap space > is being used up. This particular > instance has been up for 30+ days, so maybe there is incremental swap space > saturation over time? Swappiness setting makes Linux swap out process data to retain data in page cache. It's likely to happen when the JVM heap is too large and continues to grow. The old stuff never gets referenced and is eventually swapped out, and then later z/VM will page out that VDISK again. Still find, until the point where you do a garbage collect and re-use the heap pages. That requires Linux to swap it in, which means z/VM must page it in.. etc. Rob -- Rob van der Heij Velocity Software http://www.velocitysoftware.com/ ---------------------------------------------------------------------- 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/
