Revision as of 13:41, 1 December 2010

Performance observation short cuts for noobs

Introduction

Purpose

Scope

Acronyms, descriptions

References

http://www.linux-kvm.org/page/Documents: KVM documentation page.
[Webcast: When Times Get Tough, The Tough Get Tuning]: Dee-Ann LeBlanc of Splunk shows how you can get better performance from your hardware without throwing dollars at it.

Open issues

Installing the packages needed

yum install sysstat: This contains 'sar' and 'iostat'

Operating Environment

perf: Performance analysis tools for Linux.

e.g. perf top

Storage

Network

Virtualiser

xentrace: See also: [xentrace example]
xentrace_format
kmv_stat: in qemu-kvm-tools package.

Configuring the xentrace

get the xentrace_formats file
- extract the tools/xentrace/formats file from the source code.
- Get the source code at: http://www.xen.org/products/xen_archives.html
set the masks
- See also: [Classes (Masks)]
- ./xen/include/public/trace.h
- ./xen/include/asm-x86/hvm/trace.h
  - find . | xargs grep HVMTRACE_2D

Administration

Scratch pad

INSTALLATION

 yum install sysstat
   sar and iostat

XOSview GKRellM gnuplot

vmstat mpstat -P ALL top sar iostat ps

RAM vmstat -s free

cpu sar -P ALL -u ALL 10 10

NETWORK netstat

-i
-a
-s
-f

iostat ttcp

IO Performance iostat

-x

vmstat sar nfsstat bonnie++

TUNING MME sysctl and sysctl.conf

@@ Line 38: / Line 38: @@
 ; xentrace: See also: [[http://kibab.homeip.net/hw/vienna_hw6/tut_xentrace.html| xentrace example]]
 ; xentrace_format:
+; kmv_stat: in qemu-kvm-tools package.
 === Configuring the xentrace ===

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