Cherry-pick #21992 to 7.x: Fix diskio and memory bugs under windows#21999

Merged

fearful-symmetry merged 1 commit intoelastic:7.xfrom fearful-symmetry:backport_21992_7.x

Oct 20, 2020

+8-5

Commits on Oct 19, 2020

fix diskio and memory bugs under windows (elastic#21992 )
fearful-symmetry
committed