This document discusses application performance and tools for monitoring and improving performance. It identifies common issues like slow page loads, errors, and database queries that can cause performance problems. It recommends techniques like minimizing resources, using caching, optimizing database queries, and monitoring end-to-end transactions and external services to improve performance. The presenter provides their contact information and recommends Dynatrace tools for performance monitoring.

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PHP#Sydney#
April#2014#
harald.zeitlhofer@dynatrace.com#
@HZeitlhofer#
PHP#Applica=on#Performance#
Harald#Zeitlhofer#
#

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• Technology#Strategist#at#Dynatrace#
• Database#and#Web#Development#
• PHP#for#more#than#15#years#
• Always#up#for#new#things#
Harald#Zeitlhofer#

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Applica'on*Performance*

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Failures happen!
Nobody likes it when …

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Unless you work for
Google or Microsoft !

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… or this …

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... as it leads to ...

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... and finally to ...

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Yes, failures happen!!
but we can identify
and/or avoid them !

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~*20*%#

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Performance#Tools#

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some*use*cases*
and*best*prac'ces*

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Not#following#Web#Performance#Best#Prac=ces# 282!$Objects#
on#that#page#
9.68MB#Page#Size#
8.8s$Page#Load#
Time#
Most#objects#are#images#
delivered#from#the##
main#domain#

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Overloaded#pages,#lots#of#sta=c#content#
434$Resources$in#total#on#that#page:#
230#JPEGs,#75#PNGs,#50#GIFs,#…#
total%page%size%20$MB$!!!#

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pack*JS,*CSS*files*
*
use*sprites*for*images*
*
use*proper*caching*
*

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cached#content#
can#s=ll#create#roundtrips##
to#the#network!#

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Web#Request#handling#
run#PHP#in#external#process#rather#than#loaded#into#apache.#
consider#using#Nginx#+#PHP^FPM#

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mind*your*environment*
*
configure*properly*
*

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frustrated#users#
slow#user#ac=on#
response#=me#

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errors#in#PHP#execu=on#

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iden'fy*response*'me*hotspots*

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less#library#caused#
performance##
hotspot#
drill*down*to*find*the*root*cause*

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know*your*code*
*
know*your**
external*libraries*
*

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/katgrp/browse#

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/katgrp/get/$/1626#

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/cave/browse/gis/$/katgrp/1626#

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/cave/browse/gis/$/katgrp/1626#–#applica=on#context#

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Sessions#in#PHP#
• session_start()#locks#the#file#where#session#data#are#stored#
• Released#when#script#ends#
• Use#session_write_close()#to#unlock#the#file#before#execu=ng#slower#code#
• Or#create#your#own##
session#handler#with##
session_set_save_handler()#

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Looks#beher#now…#

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performance#hotspot#
/en/externalprice/#

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response#=me##
hotspot#PHP#

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session#data#locking#
response#=me#hotspot:#
usleep();*

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be*careful*with*locking*
*
only*lock*when*required,*
release*lock*
as*soon*as*possible*

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Locking#problem#solved,#but#…#

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/katgrp/browse#server#side#execu=on#
=me#to#check##
the#database#

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From#the#DB#perspec=ve#
Check#for#proper#indexes!#
#
Occasionally#full#table#scans#are#
performed#even#though#indexes##
are#available,#especially#in#complex#
queries.#Some=mes#only#a#rewrite#
of#the#query#helps.#

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Here#we#go:#

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mind*the*database*!!!*
*

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anything#else#we#can#do?#
what*about**
3rd*party*content?*

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3rd#party#content#

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3rd#party#content#

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watch*external*services*
*
be*aware*there*are*
services*you**
can't*control*
*

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But still,
failures happen!!
identify them as soon
as possible

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End^To^End#Transac=on#Monitoring#

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... to make sure that ...

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• Load#Generator##
(Apache#Benchmark,#Selenium,#JMeter)#
• Firebug,#Google#Developer#Tools#
Dynatrace#Ajax#Edi=on#
• Google#PageSpeed#
• Dynatrace#Free#Trial#
• Free#trial#license#for#30#days#
• Free#personal#license#for#developers#
My#favorite#tools#
hhp://bit.ly/dhrial#

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www.dynatrace.com#
Thank#you#!!!#
Harald*Zeitlhofer*
Senior#Technology#Strategist#
#HZeitlhofer#
harald.zeitlhofer@dynatrace.com#
hhp://blog.dyntrace.com#