zaaath opened a new pull request, #2919:
URL: https://github.com/apache/cassandra/pull/2919
### Before
Nodetool reports milliseconds (ms) with anywhere from 3 to 15 significant
digits. Ratios use five or sixteen decimal places. Averages use 1 or 13
decimal places.
Example:
```bash
Keyspace: system
Read Count: 18
Read Latency: 5.364611111111111 ms
Write Count: 22
Write Latency: 0.6970454545454545 ms
Pending Flushes: 0
Table: IndexInfo
...
SSTable Compression Ratio: 1.14583
...
Local read count: 1
Local read latency: 17.084 ms
Local write count: 1
Local write latency: 1.916 ms
Local read/write ratio: 1.00000
...
Bloom filter false ratio: 0.00000
...
Average live cells per slice (last five minutes): 1.0
Maximum live cells per slice (last five minutes): 1
Average tombstones per slice (last five minutes): 1.0
Maximum tombstones per slice (last five minutes): 1
Droppable tombstone ratio: 0.00000
```
### After
Milliseconds use 3 decimal places
Ratios use 3 decimal places (tenths of a percent)
Averages use 2 decimal places
Example:
```bash
Keyspace: system
Read Count: 18
Read Latency: 5.084 ms
Write Count: 22
Write Latency: 0.566 ms
Pending Flushes: 0
Table: IndexInfo
...
SSTable Compression Ratio: 1.146
...
Local read count: 1
Local read latency: 14.237 ms
Local write count: 1
Local write latency: 0.770 ms
Local read/write ratio: 1.000
...
Bloom filter false ratio: 0.000
...
Average live cells per slice (last five minutes): 61.43
Maximum live cells per slice (last five minutes): 72
Average tombstones per slice (last five minutes): 1.0
Maximum tombstones per slice (last five minutes): 1
Droppable tombstone ratio: 0.000
```
### How to reproduce
`nodetool tablestats`
### Tests
`ant testsome -Dtest.name=org.apache.cassandra.utils.FBUtilitiesTest`
patch by @zaaath; reviewed by ??? for
[CASSANDRA-19015](https://issues.apache.org/jira/browse/CASSANDRA-19015)
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