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

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Zhongyi Xie b0259e45e0 add more tracing for stats history (#5566) ... Summary: Sample info log output from db_bench: In-memory: ``` 2019/07/12-21:39:19.478490 7fa01b3f5700 [_impl/db_impl.cc:702] ------- PERSISTING STATS ------- 2019/07/12-21:39:19.478633 7fa01b3f5700 [_impl/db_impl.cc:753] Storing 145 stats with timestamp 1562992759 to in-memory stats history 2019/07/12-21:39:19.478670 7fa01b3f5700 [_impl/db_impl.cc:766] [Pre-GC] In-memory stats history size: 1051218 bytes, slice count: 103 2019/07/12-21:39:19.478704 7fa01b3f5700 [_impl/db_impl.cc:775] [Post-GC] In-memory stats history size: 1051218 bytes, slice count: 102 ``` On-disk: ``` 2019/07/12-21:48:53.862548 7f24943f5700 [_impl/db_impl.cc:702] ------- PERSISTING STATS ------- 2019/07/12-21:48:53.862553 7f24943f5700 [_impl/db_impl.cc:709] Reading 145 stats from statistics 2019/07/12-21:48:53.862852 7f24943f5700 [_impl/db_impl.cc:737] Writing 145 stats with timestamp 1562993333 to persistent stats CF succeeded ``` ``` 2019/07/12-21:48:51.861711 7f24943f5700 [_impl/db_impl.cc:702] ------- PERSISTING STATS ------- 2019/07/12-21:48:51.861729 7f24943f5700 [_impl/db_impl.cc:709] Reading 145 stats from statistics 2019/07/12-21:48:51.861921 7f24943f5700 [_impl/db_impl.cc:732] Writing to persistent stats CF failed -- Result incomplete: Write stall ... 2019/07/12-21:48:51.873032 7f2494bf6700 [WARN] [lumn_family.cc:749] [default] Stopping writes because we have 2 immutable memtables (waiting for flush), max_write_buffer_number is set to 2 ``` Pull Request resolved: https://github.com/facebook/rocksdb/pull/5566 Differential Revision: D16258187 Pulled By: miasantreble fbshipit-source-id: 292497099b941418590ed4312411bee36e244dc5		6 years ago
..
db_impl.cc	add more tracing for stats history (#5566)	6 years ago
db_impl.h	Fix bugs in WAL trash file handling (#5520)	6 years ago
db_impl_compaction_flush.cc	Ref and unref cfd before and after calling WaitForFlushMemTables (#5513)	6 years ago
db_impl_debug.cc	Ref and unref cfd before and after calling WaitForFlushMemTables (#5513)	6 years ago
db_impl_experimental.cc	simplify include directive involving inttypes (#5402)	6 years ago
db_impl_files.cc	Fix bugs in WAL trash file handling (#5520)	6 years ago
db_impl_open.cc	Fix bugs in WAL trash file handling (#5520)	6 years ago
db_impl_readonly.cc	Make format	6 years ago
db_impl_readonly.h	Organizing rocksdb/db directory	6 years ago
db_impl_secondary.cc	setup wal_in_db_path_ for secondary instance (#5545)	6 years ago
db_impl_secondary.h	Override check consistency for DBImplSecondary (#5469)	6 years ago
db_impl_write.cc	force flushing stats CF to avoid holding old logs (#5509)	6 years ago
db_secondary_test.cc	Fix a bug caused by secondary not skipping the beginning of new MANIFEST (#5472)	6 years ago