Kaunas JUG Meeting #25 The "hands on" session with tools is not included in slides.

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Load Testing with
JMeter, BlazeMeter, New Relic
Giedrius Kriščiukaitis
giedriusk@gmail.com

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Performance
https://www.youtube.com/watch?v=ChSazF41q-s
“...use the minimum it takes to make it happen...”
Jerry Miculek (world champion shooter)
(watch first 3min. - the take away about essential
needs for performance)

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What to test?
1. Regressions in code
Ramp THREADS from 1 to 20 – does response time
change exponentially? It should be line or linear.
2. Page-views per day/hour/second
(Business requirements)
Ramp THREADS from 1 to n (e.g. 200-1000 or more)
and monitor the response time graph when it starts to
go up (get your max thread count there). Then for
required period of time execute a test with max
THREADS to get most page-views count. You can
compare this amount with Google analytics real data.

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Measuring performance in life...

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...does not guarantee the victory.
It just shows if
you can/can not go racing...

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Response time
Response time is the total amount of time it takes to respond to a
request for service.
Observers can recall one specific image in an unbroken series of
different images, each of which lasts as little as 13 milliseconds

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Client side

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Server Side

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Anatomy of Your Test
Laptop
CPU RAM DISK NET
AP server
CPU RAM DISK NET
DB server
CPU RAM DISK NET
Threads eat RAM
Network latency
Limits by ISP
Firewalls
Load balancers
Cost of Traffic
No dedicated network
Hostnames instead of Ips
Additional facilitating software/hardware

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Load
An idle computer has a load number of 0.
Each process using or waiting for CPU (the ready queue or
run queue) increments the load number by 1.
Load < 10 = OK

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JMeter
Load test functional behavior and measure performance.
http://jmeter.apache.org/

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Distributed JMeter

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BlazeMeter
Continuous load testing platform.
https://blazemeter.com/

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New Relic
Application Performance Management & Monitoring.
http://newrelic.com/

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Most important metrics?
l Response time value
l Response time graph
l Page views count per test
l Error %
l Server resources status

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Google PageSpeed
PageSpeed Insights analyzes the content of a web page,
then generates suggestions to make that page faster.
This is a perfect tool to start with. It does list you the client
side performance issues.
https://developers.google.com/speed/pagespeed/insights/

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Respect Hardware
Hardware is fragile. Please understand whole picture,
all components and consequences when you will plan
your next test.

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Questions?
Giedrius Kriščiukaitis
giedriusk@gmail.com
https://m.do.co/c/a1c0bd9bc8be
10 USD
For a VM >

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