executor, util: improve concurrency of statement summary(#14490)#14627

Merged

sre-bot merged 1 commit intopingcap:release-3.0from djshow832:cherry-pick_14490_3.0

Feb 5, 2020

+96-33

Commits on Feb 4, 2020

executor, util: improve concurrency of statement summary (pingcap#14490 )
djshow832
committed