Details
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Improvement
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Status: Resolved
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Low
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Resolution: Fixed
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None
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Quality Assurance
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Low Hanging Fruit
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All
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None
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nodetool tablestats returns latencies and ratios in a more consistent format:
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): 1.00 Maximum tombstones per slice (last five minutes): 1 Droppable tombstone ratio: 0.000Tests:
ant testsome -Dtest.name=org.apache.cassandra.utils.FBUtilitiesTest
nodetool tablestats returns latencies and ratios in a more consistent format: 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): 1.00 Maximum tombstones per slice (last five minutes): 1 Droppable tombstone ratio: 0.000 Tests: ant testsome -Dtest.name=org.apache.cassandra.utils.FBUtilitiesTest CASSANDRA-19015-3.txt
Description
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.
- milliseconds should use 3 decimal places
- ratios should use 3 decimal places (tenths of a percent)
- averages should use 1 or 2
For readability, it would be helpful if large integers had comma separators. I.e., space used: as 1,463,210,998,523 and/or in GiB/MiB/KiB. It's unclear if the exact disk size is somehow useful, as it may change minute-by-minute, if not, rounding would be best, or displaying both Space used (live): 1,463,210,998,523 (1,463GiB)
Total number of tables: 83
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Keyspace : X
Read Count: 1007337271
Read Latency: 8.485891803649942 ms
Write Count: 67550181
Write Latency: 0.02556443163342523 ms
Pending Flushes: 0
Table: Y
SSTable count: 7183
Old SSTable count: 0
SSTables in each level: [0, 9, 92, 754, 6328, 0, 0, 0, 0]
Space used (live): 1463210998523
Space used (total): 1463210998523
Space used by snapshots (total): 0
Off heap memory used (total): 607419608
SSTable Compression Ratio: 0.3146620992793412
Number of partitions (estimate): 24784137
Memtable cell count: 106067
Memtable data size: 248539982
Memtable off heap memory used: 0
Memtable switch count: 256
Local read count: 865440924
Local read latency: 6.857 ms
Local write count: 13881409
Local write latency: 0.037 ms
Pending flushes: 0
Percent repaired: 0.0
Bytes repaired: 0.000KiB
Bytes unrepaired: 4315.386GiB
Bytes pending repair: 0.000KiB
Bloom filter false positives: 11027855
Bloom filter false ratio: 0.01099
Bloom filter space used: 33590024
Bloom filter off heap memory used: 33532560
Index summary off heap memory used: 8174024
Compression metadata off heap memory used: 565713024
Compacted partition minimum bytes: 36
Compacted partition maximum bytes: 17797419593
Compacted partition mean bytes: 189740
Average live cells per slice (last five minutes): 1443.2146104466253
Maximum live cells per slice (last five minutes): 105778
Average tombstones per slice (last five minutes): 1.0
Maximum tombstones per slice (last five minutes): 1
Dropped Mutations: 0
Droppable tombstone ratio: 0.00000
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