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In versions of Filebeat prior to 7.10.2, the go runtime defaults to
MADV_FREE by default.
In some cases, this can lead to high RSS memory usage while the kernel waits to reclaim any pages assigned to Filebeat.
On versions prior to 7.10.2, set the
GODEBUG="madvdontneed=1" environment variable if you run into RSS usage issues.
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