rocksdb

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Zhongyi Xie a291f3a1e5 Collect compaction stats by priority and dump to info LOG (#5050 )

Summary:
In order to better understand compaction done by different priority thread pool, we now collect compaction stats by priority and also print them to info LOG through stats dump.

```
** Compaction Stats [default] **
Priority    Files   Size     Score Read(GB)  Rn(GB) Rnp1(GB) Write(GB) Wnew(GB) Moved(GB) W-Amp Rd(MB/s) Wr(MB/s) Comp(sec) CompMergeCPU(sec) Comp(cnt) Avg(sec) KeyIn KeyDrop
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Low      0/0    0.00 KB   0.0     16.8    11.3      5.5       5.6      0.1       0.0   0.0    406.4    136.1     42.24             34.96        45    0.939     13M  8865K
High      0/0    0.00 KB   0.0      0.0     0.0      0.0      11.4     11.4       0.0   0.0      0.0     76.2    153.00             35.74     12185    0.013       0      0
```
Pull Request resolved: https://github.com/facebook/rocksdb/pull/5050

Differential Revision: D14408583

Pulled By: miasantreble

fbshipit-source-id: e53746586ea27cb8abc9fec35805bd80ed30f608

2019-03-19 17:28:19 -07:00

env_basic_test.cc

Apply modernize-use-override (3)

2019-02-19 13:39:49 -08:00

env_chroot.cc

Apply modernize-use-override (3)

2019-02-19 13:39:49 -08:00

env_chroot.h

Change RocksDB License

2017-07-15 16:11:23 -07:00

env_encryption.cc

Apply modernize-use-override (3)