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rocksdb/db/db_impl
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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
2019-07-15 11:49:17 -07:00
..
db_impl.cc add more tracing for stats history (#5566) 2019-07-15 11:49:17 -07:00
db_impl.h Fix bugs in WAL trash file handling (#5520) 2019-07-06 21:07:32 -07:00
db_impl_compaction_flush.cc Ref and unref cfd before and after calling WaitForFlushMemTables (#5513) 2019-07-01 14:12:02 -07:00
db_impl_debug.cc Ref and unref cfd before and after calling WaitForFlushMemTables (#5513) 2019-07-01 14:12:02 -07:00
db_impl_experimental.cc simplify include directive involving inttypes (#5402) 2019-06-06 13:56:07 -07:00
db_impl_files.cc Fix bugs in WAL trash file handling (#5520) 2019-07-06 21:07:32 -07:00
db_impl_open.cc Fix bugs in WAL trash file handling (#5520) 2019-07-06 21:07:32 -07:00
db_impl_readonly.cc Make format 2019-05-31 15:24:43 -07:00
db_impl_readonly.h Organizing rocksdb/db directory 2019-05-31 11:57:01 -07:00
db_impl_secondary.cc setup wal_in_db_path_ for secondary instance (#5545) 2019-07-07 21:32:50 -07:00
db_impl_secondary.h Override check consistency for DBImplSecondary (#5469) 2019-06-17 15:39:55 -07:00
db_impl_write.cc force flushing stats CF to avoid holding old logs (#5509) 2019-07-01 11:56:43 -07:00
db_secondary_test.cc Fix a bug caused by secondary not skipping the beginning of new MANIFEST (#5472) 2019-06-18 11:21:37 -07:00