Usage
Run all memory leak tests:
python3 test/memoryleak/test_memory_leaks.py
Run a specific test:
python3 test/memoryleak/test_memory_leaks.py --test="Test temporary table leaks (#5501)"
Running tests in the debugger requires passing the --memory-leak-tests flag:
build/debug/test/unittest "Test temporary table leaks (#5501)" --memory-leak-tests
Description
The memory leak folder contains memory leak tests. These are tests that run forever (i.e. they contain a while true loop). The tests are disabled unless the --memory-leak-tests flag is passed to the test runner.
The core idea of the tests is that they perform operations in a loop that should not increase memory of the system (e.g. they might create tables and then drop them again, or create connections and then destroy them).
A separate Python script is used to run these tests (test/memoryleak/test_memory_leaks.py). The Python script measures the resident set size of the unittest using the ps system call.
- The script measures memory usage of the test - if the memory usage does not stabilize within the timeout the test is considered a failure.
- Stabilized memory usage means that the trend of memory usage has not been going up in the past 10 seconds
- The exact threshold of what "going up" means is determined by
--threshold-percentageand--threshold-absolute - The timeout is determined by
--timeout