e5fa4944fc
Summary: Add a check at the end of GetImpl to release SuperVersion if it becomes obsolete. Also do Scrape() inside InstallSuperVersion so it happens more frequent. Test Plan: make all check running asan_check now Reviewers: igor, haobo, sdong, dhruba Reviewed By: haobo CC: leveldb Differential Revision: https://reviews.facebook.net/D16641