ScaleyourPHPwebapptogetreadyforthepeakseason

harald.zeitlhofer@dynatrace.com@HZeitlhofer

HaraldZeitlhofer

• TechnologyStrategistatDynatrace• DatabaseandWebDevelopment• Lovetodiscovernewthings

Ouronlineshopistooslow!

Weneedtoscale up!!!

PerformancevsScalability

Doesperformancematter?

Scalabilityismore

• Createwellsizedenvironment• Ensurehighavailability• Ensurehighperformance• Handlelargenumberoftransactions• Respondtochangedloadconditions• Respondtofeaturerequests• Findandfixproblemsfast

?

BadNews

PHP is slower than Java

PHP is not the bottleneck

GoodNews

Preparetoscale

• Breakyourapplicationdownintosmallercomponents• Frontend• LoadBalancer• WebServer• CachingServer• PHPengine• Database

• Avoidbottlenecks• Reduceload

WebRequesthandling

cachedcontent

canstillcreateroundtripstothenetwork!

SplitwebserverandPHPengine

http://www.slideshare.net/HaraldZeitlhofer/boost-your-website-by-running-php-on-nginx

Loadbalancing

upstream php {ip_hash;server unix:/var/run/php5-fpm.sock weight=5;server 192.168.56.12:9000 weight=2;server 192.168.56.13:9000;server 192.168.56.14:9000;server 192.168.58.21:9000 backup;

}

server {listen 80;root /var/www/mysite;server_name www.mysite.com;location / {

try_files $uri =405;}location ~ \.php$ {

fastcgi_pass php;fastcgi_index index.php;include fastcgi_params;

}}

Optimizefirst?

Example:“wehavetocatchmoremice”

Sofarweonlygottwocats…

Focusonwhat’sneededDonotover-optimize

PHP tier representsa major global bottleneck

for page load times

Example:PerformancehotspotPHPexecution

lessc CSSpreprocessor

social loginmodule

slow PHPexecution

Majorperformancehotspots

lessCSSpreprocessor

server-side calls tounused external services

SocialLoginModule

average contribution ofPHP compilation time

SlowPHPexecution?OutdatedPHPversion?

7:00a.m.LowLoadandServicerunningonminimum redudancy

12:00p.m.Scaledupserviceduringpeakloadwithfailoverofproblematicnode

7:00p.m.Scaleddownagaintolowerloadandmovetodifferentgeolocation

Deploymentsarenolongerstatic

Performanceproblemafterupscaling

DatabaseAccess

• Sizeserver(cluster)appropriatelyformaximumnumberofconnectedinstances• Reduceconnections• ReduceSQLstatements• Leveragecaching

Caching!=Caching

ClientSideCaching

ServerSideCaching

Varnish

Varnish

NginxFastCGI cache

• PartofNginx'FastCGI module

fastcgi_cache_path /etc/nginx/cache levels=1:2 keys_zone=APPKEY:100m inactive=60m;fastcgi_cache_key "$scheme$request_method$host$request_uri";

location ~* \.php$ {fastcgi_index index.php;fastcgi_pass 127.0.0.1:9000;include fastcgi_params;fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;fastcgi_param SCRIPT_NAME $fastcgi_script_name;fastcgi_cache APPKEY;fastcgi_cache_valid 200 60m;

}

DatacachewithMemcached<?php

...function __construct () {

$this->c = new Memcached();$this->c->addServer('memcached.server',11211);

}function setCache ($key, $content) {

$this->c->set($key, $content);}

...// get data structure$this->setCache('/gis/cave/getGeoJSON/'.$this->id, $this->getGeoJSON());...

?>

AccesscacheddatawithNginxupstream php {

server 192.168.56.1:9000;}

server {

location /gis/cave/getGeoJSON {set $memcached_key "$uri";memcached_pass memcached.server:11211;error_page 404 502 504 = @notincache;

}

location @notincache {fastcgi_pass php;

}}

myfirstmicroservice architecture

Browser Cache Webserver PHP Database

3rd party 3rd party

Java,.Net,Node.js,…

ApplicationPerformanceManagement

DatabaseHealth

Chartingdatainbusinessdashboards

Whathavewelearnedtodayaboutscaling?

• Createwellsizedenvironment• Ensurehighavailability• Ensurehighperformance• Handlelargenumberoftransactions• Respondtochangedloadconditions• Respondtofeaturerequests• Findandfixproblemsfast• Monitorproperly

HaraldZeitlhoferPerformanceAdvocate@HZeitlhoferharald.zeitlhofer@dynatrace.comhttp://blog.dynatrace.com

DynatraceFreeTrialFreePersonalLicenseRuxit FreeTrialhttp://bit.ly/monitoring-2016