Dale Emery created GEODE-9443:
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Summary: Increase kernel.pid_max in CI images
Key: GEODE-9443
URL: https://issues.apache.org/jira/browse/GEODE-9443
Project: Geode
Issue Type: Test
Components: tests
Reporter: Dale Emery
Certain Geode tests create a lot of threads. When these tests run in parallel
with many other tests (as they do in CI), the whole set of concurrently running
tests can overwhelm the Linux kernel's ability to assign PIDs to new threads.
When this happens, test processes, Gradle processes, and other processes can
become unable to create new threads.
The relevant system parameter is {{kernel.pid_max}}. On our CI systems,
{{pid_max}} is 98,304.
Raising {{pid_max}} to 983040 (10x the default value). A build can run 24
concurrent instances of even our most thread-heavy tests without exceeding this
threshold.
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