executor: fix the issue that `pb` memory cannot be released quickly (#10815)#10832

Merged

zz-jason merged 1 commit intopingcap:release-3.0from qw4990:release-3.0-pb-mem

Jun 19, 2019

+126-12

Commits on Jun 18, 2019

executor: fix the issue that pb memory cannot be released quickly (pingcap#10815 )
qw4990
committed