tree c46c0d813d92ff0c6aa9285dcab4412b101ac20f
parent 198f66489d842994abbcbabd621c3ed6f4d8c730
author Dale Emery <demery@vmware.com> 1626884959 -0700
committer GitHub <noreply@github.com> 1626884959 -0700
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GEODE-9443: Increase pid_max in CI images (#6710)

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`. In our CI images,
`pid_max` is 98,304.

This commit raises CI images' `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.

Co-authored-by: Dale Emery <demery@vmware.com>