a68d814570
Summary: purge_queue_ maybe contains thousands sst files, for example manual compact a range. If full scan is triggered at the same time and the total sst files number is large, RocksDB will be blocked at https://github.com/facebook/rocksdb/blob/master/db/db_impl_files.cc#L150 for several seconds. In our environment we have 140,000 sst files and the manual compaction delete about 1000 sst files, it blocked about 2 minutes. Commandeering https://github.com/facebook/rocksdb/issues/5290. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5796 Differential Revision: D17357775 Pulled By: riversand963 fbshipit-source-id: 20eacca917355b8de975ccc7b1c9a3e7bd5b201a