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set madvdontneed=1 to shrink RSS after GC #1268

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jackysp merged 1 commit into pingcap:release-3.1 from bobotu:madv-3.1

Apr 13, 2020

bobotu commented Apr 13, 2020

Go 1.13 use MADV_FREE which will cause RSS don't shrink even if heap size is shrunk.

Set madvdontneed=1 in GODEBUG will ask runtime use MADV_DONTNEED, which will shrink RSS size more quickly.


          set madvdontneed=1 to shrink RSS after GC

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bobotu added 3.1 cherry-pick labels

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LGTM

jackysp merged commit b2aaaa5 into pingcap:release-3.1

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3.1 cherry-pick enhancement