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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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FENCE_AGENT(8)						      System Manager's Manual						    FENCE_AGENT(8)

NAME
fence_vmware - Fence agent for VMWare DESCRIPTION
fence_vmware is an I/O Fencing agent which can be used with the VMware ESX, VMware ESXi or VMware Server to fence virtual machines. Before you can use this agent, it must be installed VI Perl Toolkit or vmrun command on every node you want to make fencing. VI Perl Toolkit is preferred for VMware ESX/ESXi and Virtual Center. Vmrun command is only solution for VMware Server 1/2 (this command will works against ESX/ESXi 3.5 up2 and VC up2 too, but not cluster aware!) and is available as part of VMware VIX API SDK package. VI Perl and VIX API SDK are both available from VMware web pages (not int RHEL repository!). You can specify type of VMware you are connecting to with -d switch (or vmware_type for stdin). Possible values are esx, server2 and server1.Default value is esx, which will use VI Perl. With server1 and server2, vmrun command is used. After you have successfully installed VI Perl Toolkit or VIX API, you should be able to run fence_vmware_helper (part of this agent) or vmrun command. This agent supports only vmrun from version 2.0.0 (VIX API 1.6.0). fence_vmware accepts options on the command line as well as from stdin. Fenced sends parameters through stdin when it execs the agent. fence_vmware can be run by itself with command line options. This is useful for testing and for turning outlets on or off from scripts. Vendor URL: http://www.vmware.com PARAMETERS
-o, --action=<action> Fencing Action (Default Value: reboot) -a, --ip=<ip> IP Address or Hostname This parameter is always required. -l, --username=<name> Login Name This parameter is always required. -p, --password=<password> Login password or passphrase -S, --password-script=<script> Script to retrieve password -n, --plug=<id> Physical plug number or name of virtual machine This parameter is always required. -e, --exec=<command> Command to execute -d, --vmware_type=<type> Type of VMware to connect (Default Value: esx) -x, --ssh SSH connection (Default Value: true) -k, --identity-file=<filename> Identity file for ssh -s, --vmware-datacenter=<dc> Show only machines in specified datacenter -v, --verbose Verbose mode -D, --debug-file=<debugfile> Write debug information to given file -V, --version Display version information and exit -h, --help Display help and exit -C, --separator=<char> Separator for CSV created by operation list (Default Value: ,) --power-timeout Test X seconds for status change after ON/OFF (Default Value: 20) --shell-timeout Wait X seconds for cmd prompt after issuing command (Default Value: 3) --login-timeout Wait X seconds for cmd prompt after login (Default Value: 5) --power-wait Wait X seconds after issuing ON/OFF (Default Value: 0) --delay Wait X seconds before fencing is started (Default Value: 0) --retry-on Count of attempts to retry power on (Default Value: 1) ACTIONS
on Power on machine. off Power off machine. reboot Reboot machine. status This returns the status of the plug/virtual machine. list List available plugs with aliases/virtual machines if there is support for more then one device. Returns N/A otherwise. monitor Check if fencing device is running. List available plugs/virtual machines or get status of machine (if it does not support more). metadata The operational behavior of this is not known. STDIN PARAMETERS
action Fencing Action (Default Value: reboot) ipaddr IP Address or Hostname This parameter is always required. login Login Name This parameter is always required. passwd Login password or passphrase passwd_script Script to retrieve password port Physical plug number or name of virtual machine This parameter is always required. exec Command to execute vmware_type Type of VMware to connect (Default Value: esx) secure SSH connection (Default Value: true) identity_file Identity file for ssh vmware_datacenter Show only machines in specified datacenter verbose Verbose mode debug Write debug information to given file version Display version information and exit help Display help and exit separator Separator for CSV created by operation list (Default Value: ,) power_timeout Test X seconds for status change after ON/OFF (Default Value: 20) shell_timeout Wait X seconds for cmd prompt after issuing command (Default Value: 3) login_timeout Wait X seconds for cmd prompt after login (Default Value: 5) power_wait Wait X seconds after issuing ON/OFF (Default Value: 0) delay Wait X seconds before fencing is started (Default Value: 0) retry_on Count of attempts to retry power on (Default Value: 1) fence_vmware (Fence Agent) 2009-10-20 FENCE_AGENT(8)
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