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RHEL Performance Tuning:

Using Zabbix to identify problems

Andrew Nelson

Consultant, Red Hat

September, 21, 2012

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Andrew elson2

Performance Tuning Agenda

whoami Why tune?

Littles Law

!nstrumentation Real world e"ample

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Andrew elson#

! w"oami

Andrew Nelsonanelson$redhat%&om

Consultant with Red Hat North Ameri&a

A&ti'e in the (abbi" &ommunity )or appro"imately *years

+nown as nelsonab- in )orums and !RC

Author o) (ab&on and (b"api

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Andrew elson.

#"y Tune

/er)orman&e tunin is somethin we'e all needed todo at some point%

inimie wait time

!n&rease per)orman&e 3pae 'iews )or web ser'er4

!n&rease lone'ity o) old hardware

/ower sa'in

!ts too slow- 35sers are always so spe&i)i&4

A+A6 a"imie Return on !n'estment

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Andrew elson7

Little$s Law

/er)orman&e tunin is somethin we ha'e all had to do atsome point%

/er)orman&e tunin is de)ined by a )ormula 8nown asLittles Law

L9:h /ublished in 1;ueuin and&onestion in telephone networ8s%

L otal number o) Customers 3@ueue epth4 : Arri'al Rate

h A'erae time to ser'i&e 3&ustomer4 re>uests

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Andrew elsonueue,ss m M rep mem M sed sG%r3T0;U4,%G1GMaw8 sumV9O1P=Nprint sumP

5ser/arameter9C/%t"Q>ueue,ss m M rep mem M sed sG%w3T0;U4,%G1GMaw8 sumV9O1P=Nprint sumP

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Andrew elson17

Real #orld Example

Lets add some more raphs 3is84

')s%de'%readTdis8X,operationsU

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Andrew elson1