PHP application performance

COMPANY CONFIDENTIAL – DO NOT DISTRIBUTE1
PHP#Meetup#Melbourne,#Australia#
April#2014#
Harald#Zeitlhofer#
@HZeitlhofer#
PHP#Applica=on#Performance#

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

I’m#from#Austria#

But#you#probably#
know#that...#

And#
for#
sure#
you##
know#
that##

Also#from#Austria#

You#might#have#heard#of...#

Applica=on#Performance#

Failures happen!!
Nobody likes it when …

Unless you work for
Google or Microsoft !

… or this …

.. as it leads to this …

The#“War#Room”#
#
Facebook#–#December#2012#

… and potentially to this …

And this isn’t helping either …

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

but#where#should#we#start?#

and#when#???#
?

some%use%cases%
and%best%prac/ces%

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#
Very#long#connect#=me#
(1.8s)#to#the#CDN#

Mobile#Web#Site:#This#SHOULD#NOT#happen!#
434$Resources$in#total#on#that#page:#
230#JPEGs,#75#PNGs,#50#GIFs,#…#
Total#size#of#~#20MB$

cached#content#
s=ll#creates#roundtrips#!#

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

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

errors#in#PHP#execu=on#

less#library#caused#
performance##
hotspot#

know%your%code%
%
know%your%%
external%libraries%
%

/katgrp/browse#

/katgrp/get/$/1626#

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

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

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##
save#handler#with##
session_set_save_handler()#

Looks#bener#now…#

performance#hotspot#
/en/externalprice/#

response#=me##
hotspot#PHP#

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

be%careful%with%locking%
%

Locking#problem#solved,#but#…#

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

From#the#DB#perspec=ve#

Here#we#go:#

N+1#Queries#
Metrics:##
##SQL#Execu=ons#/#Request#
##of#“same”#SQL#Execu=ons#

mind%the%database%!!!%
%

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

3rd#party#content#

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

to#summarize#that#

PHP#Applica=on#Performance#

PHP#OpCache#

PHP#OpCache#disabled#

PHP#OpCache#enabled#

huge#number#of#
sta=c#resources#

Web#Request#handling#

Transac=on#ﬂow#

Nginx#FastCGI#cache#

Full#page#/#data#cache#with#Nginx#and#Memcached#
<?php
...
function __construct () {
$this->c = new Memcached();
$this->c->addServer('localhost',11211);
}
function setCache ($key, $content) {
$this->c->set($key, $content);
}
...
$this->setCache($_SERVER['REQUEST_URI'], $this->renderPage());
...
$this->setCache('/data/news/getlist', $this->getNewsList());
...
?>

• ngx_hnp_memcached_module#
Full#page#/#data#cache#with#Nginx#and#Memcached#
server {
location / {
set $memcached_key "$uri";
memcached_pass localhost:11211;
error_page 404 502 504 = @fallback;
}
location @fallback {
proxy_pass http://backend;
}
}

PHP,#5k#requests,#concurrency#100#
0#
1#
2#
3#
4#
5#
6#
7#
8#
Apache+PHP# Nginx+PHP# Nginx+Memcached#
<?php
echo "Hello World";
?>

use%right%server%tools%
%
conﬁgure%properly%
%

But still,
failures happen!!
make sure to identify
them as soon as
possible

EndtTotEnd#Applica=on#Monitoring#

monitor%all%transac/ons%in%all%channels%

User#Experience#Management#
locate%regional%performance%issues%

monitor%your%infrastructure%

process%monitoring%

iden/fy%response%/me%hotspots%in%the%backend%

COMPANY CONFIDENTIAL – DO NOT DISTRIBUTE83 drill%down%to%ﬁnd%the%root%cause%

Applica=on#Performance#

Performance#Tools#

• Load#Generator#(Apache#Benchmark,#JMeter)#
• Firebug,#Google#Developer#Tools#
Dynatrace#Ajax#Edi=on#
• Google#PageSpeed#
• Dynatrace#Free#Trial#
•  Free#trial#license#for#30#days#
•  Free#for#developers#on#local#machine#
My#favorites#
hnp://bit.ly/dnrial#

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

PHP application performance

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