digital poets society: symfony2 load testing

Load Testing

Load Testing

Me

David GilbertHosting Manager @ August

david.gilbert@august.com.au

Me

Ops not Dev

What’s this got to do with Symfony2?

“On the other hand, Symfony2 was

conceived from the start to be fast, with a

strong emphasis on performance.”- The technological benefits of Symfony in 6 easy lessons

http://symfony.com/six-technical-reasons

Warning! Contains nuts

Your mileage may WILL vary

What is Load Testing?“Load testing is a simulation of multiple users working with a web application at

the same time.”

“It can be performed for a number of purposes, but the main goal is to check

the performance of the application.”

Types of Load Testing

Performance Testing

Capacity Testing

Stress Testing

Volume Testing

Endurance Testing

Regression Testing

Types of Load Testing

Performance Testing

Capacity Testing

Stress Testing

Volume Testing

Endurance Testing

Regression Testing

Load Testing Tools

Apache JMeter

HP LoadRunner

Load Impact

Siege

http://www.joedog.org/siege-home/

Assumed Infrastructure

Preparing for battle - ~/.siegercCreate an initial configuration

$ siege.configCustomise

csv = trueshow-logfile = false

benchmark = true

But the pages I need to test are password protected!http basic authentication

login =Cookie based authentication

login-url =

Specifying pages to testTwo ways:

On the command line$ siege http://www.example.com/

Using a file of URLsfile =

Laying siegeDon’t do this:

$ siege -c 200 -t 10m

Start simple$ siege -c 1 -t 30s

Save the individual test timings$ siege -c 1 -t 30s > siege.csv

Interpreting Results - Summary

Interpreting Results

Pitfalls· Don’t load test your load testing host

· Know the capacity of the network between your load test host and the load test target

· Monitor the load test target and check for contention when testing

iptables Connection Tracking$ sysctl net.netfilter.nf_conntrack_maxnet.netfilter.nf_conntrack_max = 31884

$ sudo tail -f /var/log/messagesJun 4 22:14:27 noc kernel: nf_conntrack: table full, dropping packet.

$ sudo sysctl -w net.netfilter.nf_conntrack_max=49152net.netfilter.nf_conntrack_max = 49152

TCP TIME_WAIT state$ sysctl net.ipv4.ip_local_port_rangenet.ipv4.ip_local_port_range = 32768 61000

=> 28,233 usable ports$ sudo sysctl -w net.ipv4.ip_local_port_range=’1024

65535’net.ipv4.ip_local_port_range = 1024 65535

Beat those Web Apps!