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[Xen-users] speed problem with java and WebSphere 5.1 after virtualizing server

  • To: xen-users <xen-users@xxxxxxxxxxxxxxxxxxx>
  • From: "Marco Strullato" <marco.strullato@xxxxxxxxx>
  • Date: Wed, 28 Nov 2007 09:43:28 +0100
  • Delivery-date: Wed, 28 Nov 2007 00:44:14 -0800
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  • List-id: Xen user discussion <xen-users.lists.xensource.com>

Hi all!

I have converted a physical server (redhat AS 3.4, kernel 2.4.21-47.0.1.EL.xs0.4.0.25xenU ) to a virtual server with Dom0 CentOS 5 32bit.

The conf file is
name = "SERVER"
memory = "1536"
maxmem = "1536"
disk = [ 'phy:/dev/vg/SERVER,sda,w', ]
kernel = "vmlinux-2.4.21-47.0.1.EL.xs0.4.0.25xenU"
ramdisk = "initrd-2.4.21-47.0.1.EL.xs0.4.0.25xenU.img"
vif = ['bridge=xenbr0' ]
vfb = ["type=vnc,vncunused=1"]
on_reboot   = 'restart'
on_crash    = 'restart'

At first during boot I noticed a problem with tls ( thread local storage) and as suggested I moved /lib/tls to  /lib/tls.disabled
So I still had speed problems: I found that I had to install a optimized version of glibc build  (follow this link http://www.slacky.eu/forum/viewtopic.php?t=21425)
After that, I still had speed problems.
Now I upgraded diskdumputils, initscripts, coreutils to the following version:

Nov 28 09:19:13 Dep Installed: diskdumputils 1.3.3-1.i386
Nov 28 09:19:13 Updated: initscripts 7.31.31.EL-1.centos.1.i386
Nov 28 09:19:13 Updated: coreutils 4.5.3-28.7.i3

And I still have speed problems.

When I say "I have speed problem" I mean I have very big speed problem with WebSphere 5.1. All java processes are really slow.

Do you have suggestions?


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