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Introduction To Sensible Load Testing - PHP Unconference Europe ...
May 28, 2016 - Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et d
Introduction To Sensible Load Testing PHP Unconference Europe 2016 Kore Nordmann (@koredn) 28th May 2016
Hi, I’m Kore (@koredn)
Simulate Real Load
Simulate Real Load
I
We did this several times
I
No shop had performance issues when going live
How?
ab / siege
jMeter
Do Not Guess – Measure!
Outline
How To Common Problems
Why Is It Complex? Awesome Shop
2 articles 42.32 €
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Analyze Scenarios
I
What happens in your shop? I I I I
Random browser User registration Logged in browser Checkout process
Crunch The Numbers
I
How many checkouts per day?
I
How many page impressions per day? How many checkouts / PIs during peak time? I 240.000 page impressions per day → 10.000PI /h? I Are you .de? → 30.000PI /h I Peak business hours? → 60.000PI /h → 20req /s
I
Write jMeter tests
JMeter 101 I
User types / execution plans I
I
Action timing I
I
Controllers
Example data, cookie manager, . . . I
I
Timers
Organize and combine logic (loops, etc.) I
I
Thread groups
Configuration elements
Actual work (HTTP, SOAP, . . . requests) I
Samplers
How to setup a load-test?
1. Provision server 2. Reset server 3. Prime server 4. Run test 5. Analyze data
Reproducible automated tests on real-world servers
Collect Data
iftstat, iftop
Load Balancer
jMeter
Verify Sessions vmstat, top
FrontEnd
FrontEnd
FrontEnd Response Times
vmstat, top
Slave
Master Services
Analyze Data Response time 75
Requests per second 300
Seconds
50
200
25
100
00:00
05:00
Minimum
09:00
13:00
Average
17:00
21:00
R/s
01:00
Maximum
00:00
CPU usage 100
09:00
13:00
17:00
21:00
01:00
01:00
05:00
Memory usage 100
Percent
75
75
50
50
25
Percent
25
05:00
System
05:00
Average
09:00
13:00
17:00
User
21:00
01:00
05:00
05:00
Used Memory
09:00
13:00
Shared
17:00
21:00
Cached
Outline
How To Common Problems
Varnish / Edge Side Includes
NFS
Server Configuration
Opcode Caches
Summary
Test Live
Test Before I
Investment
I
Sleep well
I
Tests can be run again – requires servers
I
Pray. . .
Simulate Real Load
I
We did this several times
I
No shop had performance issues when going live
I
Hardware proved almost everytime sufficient after problems with the stack were fixed
I
No shop would have made it without the improvements
