load-testing-notes

Notes for load testing / stress testing / performance testing

• https://webtide.com/lies-damned-lies-and-benchmarks-2/
• https://wiki.eclipse.org/Jetty/Howto/High_Load
• https://www.stephenrlang.com/2016/02/load-testing-with-siege/

TIME_WAIT issue

https://gist.github.com/carlos8f/3473107 - The default timeout for TIME_WAIT is on macOS 15 seconds. To change it do following steps

$ sysctl net.inet.tcp.msl
net.inet.tcp.msl: 15000
$ sudo sysctl -w net.inet.tcp.msl=100
net.inet.tcp.msl: 15000 -> 100

ApacheBench tool

Run in sequence

ab -k -n 2000 -c 1 -s 120 http://127.0.0.1:8080/a && ab -k -n 500000 -c 50 -s 120 http://127.0.0.1:8080/a
ab -k -n 2000 -c 1 -s 120 http://127.0.0.1:8080/b && ab -k -n 500000 -c 50 -s 120 http://127.0.0.1:8080/b
ab -k -n 2000 -c 1 -s 120 http://127.0.0.1:8080/c && ab -k -n 500000 -c 50 -s 120 http://127.0.0.1:8080/c

Run in parallel

cat myurls.txt
http://127.0.0.1:8080/a
http://127.0.0.1:8080/b
http://127.0.0.1:8080/c

cat myurls.txt | parallel "ab -k -n 500000 -c 50 -s 120 {}"

Siege tool

https://github.com/JoeDog/siege

siege -b -q -t2M -H "Connection: Keep-Alive" -c50 http://127.0.0.1:8080/c

Ports / connection monitoring

netstat -ap tcp | grep TIME_WAIT | wc -l
netstat -ap tcp
netstat -ap tcp | grep -i "listen"

lsof -Pn -i4 | grep LISTEN
sudo lsof -PiTCP -sTCP:LISTEN