How do I boost the Linux performace Post: 302254850

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Operating Systems Linux How do I boost the Linux performace Post 302254850 by jayfriend on Wednesday 5th of November 2008 10:12:27 AM

11-05-2008

Registered User

Quote:

Originally Posted by bakunin

I will elaborate further on this later, just a few impressions on first glance:

Your system seems to have not enough RAM for what you are doing. The result is some heavy swapping going on. The vmstat output is somewhat different from the system i usually work on (AIX), but a few things never change:

Look at the first two columns, named "r" and "b". The "r" is the number of running processes at that time, "b" is the number of blocked processes. "blocked" means the process would be ready to run but has to wait for some reason. In a majority of cases this is because it was swapped out earlier and now is waiting until swapping it in has finished.

The depth of the blocked-queue should therefore ideally be a constant zero - everything else is alarming.

On the right part of the output the CPU activity is shown. "us" "sy" "id" "wa" are percent values and add up to 100. They show how much time the CPU has spent in user space, system routines, idling and waiting. In an ideal world the CPU would spent most of its time in us and sy, the rest would go to id and wa would be 0. Every time the wa value is bigger than 0 this means that the CPU has found nothing productive to do. Most of the times this is also a side effect of processes swapping in and out, because as long as the swapping goes on the CPU can do nothing but wait, save for the few system calls necessary for the swapping itself.

Ok, I'm in a bit of a hurry, later more.

bakunin

Thank you bakunin!

jayfriend

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vmware-xferlogs

VMWARE-XFERLOGS(1)						   Open VM Tools						VMWARE-XFERLOGS(1)

NAME

       vmware-xferlogs - dump vm-support output to vmx logfile

SYNOPSIS

       vmware-xferlogs OPTIONS FILE

DESCRIPTION

       vmware-xferlogs is a simple console application and can be run as any user. It is based on rpctool to dump the vm-support output to the vmx
       log file base64 encoded. It can dump any file supplied on the commandline to the vmx log. It also does the decoding part of it. It can read
       the vmware.log file decode and write the encoded files in the directory it was invoked.

       Example of a transfer found in the vmx log file:

	    Aug  24  18:48:09:	vcpu-0|  Guest:  >Logfile  Begins  :  /root/install.log:  ver  - 1	Aug 24 18:48:09: vcpu-0| Guest: >SW5zdGFs-
       bGluZyA0NDEgcGFja2FnZXMKCkluc3RhbGxpbmcgZ2xpYmMtY29tbW9uLTIuMi41LTM0	    Aug    24	 18:48:09:    vcpu-0|	  Guest:     >LgpJbnN0YWx-
       saW5nIGh3ZGF0YS0wLjE0LTEuCkluc3RhbGxpbmcgaW5kZXhodG1sLTcuMy0zLgpJ       Aug  24	18:48:09: vcpu-0| Guest: >bnN0YWxsaW5nIG1haWxjYXAtMi4xLjk-
       tMi4KSW5zdGFsbGluZyBtYW4tcGFnZXMtMS40OC0yLgpJ	  ....	     ....	Aug 24	18:48:10:  vcpu-0|  Guest:  >Mi4K	Aug  24  18:48:10:
       vcpu-0| Guest: >Logfile Ends

OPTIONS

       enc

       dec

SEE ALSO

       vmware-checkvm(1)
       vmware-hgfsclient(1)
       vmware-toolbox(1)
       vmware-toolbox-cmd(1)
       vmware-user(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)
       vmxnet(9)
       vmxnet3(9)

HOMEPAGE

       More information about vmware-xferlogs 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							VMWARE-XFERLOGS(1)