Brad Schoening created CASSANDRA-21117:
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Summary: Nodetool info reports unreliable size in use
Key: CASSANDRA-21117
URL: https://issues.apache.org/jira/browse/CASSANDRA-21117
Project: Apache Cassandra
Issue Type: Bug
Reporter: Brad Schoening
We noticed 'nodetool info' may report the networking cache 'overflow' may be 2X
the heap size or larger.
{noformat}
Node: 169.102.228.220
Heap Memory (MB) : 9581.65 / 16384.00
Off Heap Memory (MB) : 398.83
Data Center : NA_NE_C01
Rack : D
Exceptions : 0
Key Cache : entries 964712, size 100 MiB, capacity 100 MiB, 70259124 hits,
240261115 requests, 0.292 recent hit rate, 14400 save period in seconds
Row Cache : entries 0, size 0 bytes, capacity 0 bytes, 0 hits, 0 requests, NaN
recent hit rate, 0 save period in seconds
Counter Cache : entries 0, size 0 bytes, capacity 50 MiB, 0 hits, 0 requests,
NaN recent hit rate, 7200 save period in seconds
Chunk Cache : entries 964502, size 6.1 GiB, capacity 9.97 GiB, 1515943127
misses, 2414866720 requests, 0.372 recent hit rate, 96.680 microseconds miss
latency
Network Cache : size 30.9 GiB, overflow size: 30.15 GiB, capacity 768
MiB{noformat}
in other cases, it grew to a reported 75GB or even negative values
{noformat}
Network Cache : size 76.05 GiB, overflow size: 75.05 GiB, capacity 1 GiB
Network Cache : size -154303849440 bytes, overflow size: -155377591264 bytes,
capacity 1 GiB
{noformat}
The Cassandra version this is happening on all patch versions – so i.e. 5.0.4 -
4.1.9
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