test: JWT Cache Memory usage grows quickly

[steve-chavez]

Problem

Doing:

$ postgrest-bench-k6 10 k6/GETSingleUniqueJWT.js 

And monitoring with:

watch -n 1 'ps -p $(pgrep postgrest) -o %mem,rss,vsz'

Makes the memory usage increase fast:

%MEM   RSS    VSZ
54.9 250496 1073793376

As seen on:

Screencast.from.05-28-2025.02.59.28.PM.webm

Solution

#4084 would be a solution, I've manually tested there and memory usage only reaches 12% and is maintained there.

But we really need a way to test this. Try using psrecord to do it.

Notes

• For some reason, using OPTIONS requests k6/OPTIONSUniqueJWT.js doesn't have the same memory effect as doing GET k6/GETSingleUniqueJWT.js. With OPTIONS the memory increases but quickly goes down and is maintained at ~8%.