解轶伦 39fcaf8246 delete superversions in BackgroundCallPurge (#6146) ... Summary: I found that CleanupSuperVersion() may block Get() for 30ms+ （per MemTable is 256MB）. Then I found "delete sv" in ~SuperVersion() takes the time. The backtrace looks like this DBImpl::GetImpl() -> DBImpl::ReturnAndCleanupSuperVersion() -> DBImpl::CleanupSuperVersion() : delete sv; -> ~SuperVersion() I think it's better to delete in a background thread, please review it。 Pull Request resolved: https://github.com/facebook/rocksdb/pull/6146 Differential Revision: D18972066 fbshipit-source-id: 0f7b0b70b9bb1e27ad6fc1c8a408fbbf237ae08c		2019-12-17 13:22:57 -08:00
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db_impl.cc	delete superversions in BackgroundCallPurge (#6146)	2019-12-17 13:22:57 -08:00
db_impl.h	delete superversions in BackgroundCallPurge (#6146)	2019-12-17 13:22:57 -08:00
db_impl_compaction_flush.cc	delete superversions in BackgroundCallPurge (#6146)	2019-12-17 13:22:57 -08:00
db_impl_debug.cc	Fix IngestExternalFile's bug with two_write_queue (#5976)	2019-11-15 14:00:37 -08:00
db_impl_experimental.cc	Support options.max_open_files = -1 with periodic_compaction_seconds (#6090)	2019-11-26 21:39:56 -08:00
db_impl_files.cc	Let DBSecondary close files after catch up (#6114)	2019-12-02 17:45:03 -08:00
db_impl_open.cc	Introduce a new storage specific Env API (#5761)	2019-12-13 14:48:41 -08:00
db_impl_readonly.cc	Apply formatter on recent 45 commits. (#5827)	2019-09-19 12:34:17 -07:00
db_impl_readonly.h	Use delete to disable automatic generated methods. (#5009)	2019-09-11 18:09:00 -07:00
db_impl_secondary.cc	delete superversions in BackgroundCallPurge (#6146)	2019-12-17 13:22:57 -08:00
db_impl_secondary.h	Let DBSecondary close files after catch up (#6114)	2019-12-02 17:45:03 -08:00
db_impl_write.cc	Do not create/install new SuperVersion if nothing was deleted during memtable trim (#6169)	2019-12-13 13:29:29 -08:00
db_secondary_test.cc	Break db_stress_tool.cc to a list of source files (#6134)	2019-12-08 23:51:01 -08:00