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Full Discussion: slow performing system
Top Forums UNIX for Advanced & Expert Users slow performing system Post 302598289 by sdewal on Tuesday 14th of February 2012 02:57:05 AM
Old 02-14-2012
slow performing system

Friends

Greetings. I have a RedHat 5.7 64bit virtual server on VMware ESXi 4.1. This server and other Redhat Servers are running very slow. I did some stats collection on ESXi and looks like Linux is holding the disk IO. I am not sure what is causing this behavior.

On Linux I checked the CPU and Mem utilisation which is very low, however I see high disk utilisation which is because of the activity. To copy 30 GB data it takes 7 hours. We are using NOOP disk schedular. This has been recommended by both vmware and redhat. Its not the network because the copy source is on the same virtual infrastructure. We have AMS2500 Storage array. I also sent the perf logs to Hitachi and they did not find any latencies on the storage array side. The LQD is 32.

Can someone please guide us in right direction?


Thanks
Sdewal
 

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VMXNET(9)							   Open VM Tools							 VMXNET(9)

NAME
vmxnet - vmware kernel module SYNOPSIS
modprobe vmxnet DESCRIPTION
This is a Linux kernel device driver module that drives VMware's fast networking device. As it is backed by real (virtual) hardware, it should be automatically loaded by hotplug or udev as needed. For best performance, it is recommended to enable TSO on all interfaces driven by vmxnet using ethtool. The shell code to do this might look like this: if which ethtool >/dev/null 2>&1; then for ethif in `ifconfig -a | grep ^eth | cut -d' ' -f1`; do ethtool -K $ethif tso on >/dev/null 2>&1 done fi The VMware backend may present the fast networking device as an AMD vlance device instead of the actual vmxnet device. SEE ALSO
vmware-checkvm(1) vmware-hgfsclient(1) vmware-toolbox(1) vmware-toolbox-cmd(1) vmware-user(1) vmware-xferlogs(1) libguestlib(3) libvmtools(3) vmware-guestd(8) vmware-hgfsmounter(8) vmware-user-suid-wrapper(8) vmblock(9) vmci(9) vmhgfs(9) vmmemctl(9) vmsock(9) vmsync(9) vmxnet3(9) HOMEPAGE
More information about vmxnet and the Open VM Tools can be found at <http://open-vm-tools.sourceforge.net/>. AUTHOR
Open VM Tools were written by VMware, Inc. <http://www.vmware.com/>. This manual page was put together from homepage materials by Daniel Baumann <daniel.baumann@progress-technologies.net>, for the Debian project (but may be used by others). 2010.03.20-243334 2010-04-08 VMXNET(9)
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