ceeca7542d
Summary: Create a thread in DeleteScheduler only when delete rate limit is set because when there is no rate limit on deletion, a thread per DeleteScheduler consumes unnecessary resources. Test Plan: make -j64 check Reviewed By: riversand963 Differential Revision: D20538138 Pulled By: akankshamahajan15 fbshipit-source-id: 137499e810e817156345c30d627f8678b9adadf7