This project is for testing how Java & Garden / CGroups handle memory.
Each application is a Spring Boot application, so compile with ./mvnw clean package.
The devourer application is the target for running out of memory. It should be either deployed
to CF, or started with the command run.sh, inside a memory group limited to 256m.
The narcoleptic application responds to requests from devourer, but waits a random amount of
time to do so - this causes objects in devourer to live longer than they ought to, and results
in them being added to PS Old Gen, which is the root cause of a lot of our problems.
To create the cgroups, I did:
sudo cgm create memory java
sudo cgm chown memory java andrew andrew
sudo cgm setvalue memory java memory.limit_in_bytes 268435456
And I joined it like so:
bash
sudo cgm movepid memory java $$
To crash the application, modify the load_test.jmx file (it's just XML) to point to the URL
where you have deployed the devourer application, make sure you've downloaded JMeter,
and then either run as a GUI app with $JMETER_HOME/bin/jmeter, or headless, with $JMETER_HOME/bin/jmeter -n -t load_test.jmx.