Hard Disk Performance issues Suse 11 SP1 Post: 302845553

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Top Forums UNIX for Dummies Questions & Answers Hard Disk Performance issues Suse 11 SP1 Post 302845553 by karlochacon on Wednesday 21st of August 2013 07:11:40 PM

08-21-2013

Registered User

Hard Disk Performance issues Suse 11 SP1

hi guys

right now I have 6 Virtual Machines (VMs) running on Vmware ESXi 5.1 and attached to Storage SAN.
All these run Suse Linux 11 SP1 x64.

All of a sudden 1 of these VMs is running very slow making high CPU usage and I see al wait % kinda high 40-50%. Apparently since I don't own this virtual server the server was running fine and last change made was increasing memory

so I found out that test hard disk performance must be the issue
VM having issues. It so slow that I cancel the command but it's running at 2.7 MB

Code:

dd if=/dev/zero of=test bs=1048576 count=2048
781+0 records out
818937856 bytes (819 MB) copied, 298.699 s, 2.7 MB/s

running dd command on any of the other VMs linux server is about 280MB - 310 MB/s

Code:

dd if=/dev/zero of=test3 bs=1048576 count=2048
2048+0 records in
2048+0 records out
2147483648 bytes (2.1 GB) copied, 7.64361 s, 281 MB/s

any idea what could be causing this issue or how to fix it?

thanks a lot

karlochacon

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vmci

VMCI(9) 							   Open VM Tools							   VMCI(9)

NAME

       vmci - vmware kernel module

SYNOPSIS

       modprobe vmci

DESCRIPTION

       This  is a Linux kernel device driver module that drives VMware's inter-VM communication device. The device itself is backed by a PCI-based
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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)
       vmhgfs(9)
       vmmemctl(9)
       vmsock(9)
       vmsync(9)
       vmxnet(9)
       vmxnet3(9)

HOMEPAGE

       More information about vmci 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								   VMCI(9)