fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph

Wallace 1e9bf25f61 Do not hold mutex when write keys if not necessary (#7516 An error occurred ) ... Summary: ## Problem Summary RocksDB will acquire the global mutex of db instance for every time when user calls `Write`. When RocksDB schedules a lot of compaction jobs, it will compete the mutex with write thread and it will hurt the write performance. ## Problem Solution: I want to use log_write_mutex to replace the global mutex in most case so that we do not acquire it in write-thread unless there is a write-stall event or a write-buffer-full event occur. Pull Request resolved: https://github.com/facebook/rocksdb/pull/7516 Test Plan: 1. make check 2. CI 3. COMPILE_WITH_TSAN=1 make db_stress make crash_test make crash_test_with_multiops_wp_txn make crash_test_with_multiops_wc_txn make crash_test_with_atomic_flush Reviewed By: siying Differential Revision: D36908702 Pulled By: riversand963 fbshipit-source-id: 59b13881f4f5c0a58fd3ca79128a396d9cd98efe		3 years ago
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backup_engine.cc	Make RateLimiter not Customizable (#10378 An error occurred )	3 years ago
backup_engine_impl.h	Use SpecialEnv to speed up some slow BackupEngineRateLimitingTestWithParam (#9974 An error occurred )	3 years ago
backup_engine_test.cc	Do not hold mutex when write keys if not necessary (#7516 An error occurred )	3 years ago