The key save delay is too short and on certain systems the child process
is gone before we have a chance to inspect it.
(cherry picked from commit b2a73c404bf277bac287c72494a4c4cd2ba02f8c)
1) cur_test: when restart_server, "no such variable" error occurs
./runtest --single integration/rdb
test {client freed during loading}
SET ::cur_test
restart_server
kill_server
test "Check for memory leaks (pid $pid)"
SET ::cur_test
UNSET ::cur_test
UNSET ::cur_test // This global variable has been unset.
2) `ps --ppid` not available on macOS platform, can be replaced with
`pgrep -P pid`.
(cherry picked from commit f22fa9594d536cb53f83ed8e508c03d4278778b0)
Don't assume `ps` handles `-h` to display output without headers and
manually trim headers line from output.
(cherry picked from commit b61b663895f16d9f559a14c408c225062254a57b)
Add Linux kernel OOM killer control option.
This adds the ability to control the Linux OOM killer oom_score_adj
parameter for all Redis processes, depending on the process role (i.e.
master, replica, background child).
A oom-score-adj global boolean flag control this feature. In addition,
specific values can be configured using oom-score-adj-values if
additional tuning is required.
(cherry picked from commit 2530dc0ebd8be8d792f4673073401377cd5bdc42)
