Thomas Adam created CASSANDRA-7866:
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Summary: Negative space stats
Key: CASSANDRA-7866
URL: https://issues.apache.org/jira/browse/CASSANDRA-7866
Project: Cassandra
Issue Type: Bug
Reporter: Thomas Adam
Hi folks,
I played with the 2.1.0rc7 and observed wrong space/load stats after some
compactions.
{code}
$ bin/nodetool status bench_1
UN 10.2.0.133 -111945897565 bytes 256 42,7%
f2d14317-b52c-4d0a-9276-0ac71c263269 rack1
UN 10.2.0.134 -74341626598 bytes 256 43,0%
6e263f2e-2220-4c14-8bb1-f8d55aceb25c rack1
UN 10.2.0.135 -81553517188 bytes 256 44,4%
bae17a16-e541-47bf-af5c-2a98dbfa6db5 rack1
UN 10.2.0.136 -112538823395 bytes 256 42,3%
40ec60db-7566-46a4-a87d-39e7cdad7568 rack1
UN 10.2.0.137 -52321927763 bytes 256 41,4%
97c5bcc3-2ecf-4305-abed-3f5e4cc434e5 rack1
UN 10.2.0.138 -1451999899 bytes 256 41,6%
8a15196e-9acb-41a6-b1f1-0e24e47bfa5a rack1
UN 10.2.0.139 -121058278557 bytes 256 44,6%
05a06af8-6cd3-47b8-8e24-2660064d265c rack1
{code}
{code}
$ bin/nodetool cfstats bench_1.assoc_list
Keyspace: bench_1
Read Count: 177810
Read Latency: 0.8124693324334964 ms.
Write Count: 9726101
Write Latency: 0.014907714818096173 ms.
Pending Flushes: 0
Table: assoc_list
SSTable count: 9
Space used (live), bytes: -773872869
Space used (total), bytes: -773872869
Space used by snapshots (total), bytes: 0
SSTable Compression Ratio: 0.33017935017332883
Memtable cell count: 789054
Memtable data size, bytes: 56618328
Memtable switch count: 18
Local read count: 177812
Local read latency: 0,813 ms
Local write count: 9726127
Local write latency: 0,015 ms
Pending flushes: 0
Bloom filter false positives: 2522
Bloom filter false ratio: 0,05585
Bloom filter space used, bytes: 5030400
Compacted partition minimum bytes: 150
Compacted partition maximum bytes: 25109160
Compacted partition mean bytes: 12720
Average live cells per slice (last five minutes):
30.33307088385486
Average tombstones per slice (last five minutes): 0.0
{code}
Regards,
Thomas
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