Erik Hansen created CASSANDRA-6944:
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Summary: liveRatio jumps to max when Memtable is empty
Key: CASSANDRA-6944
URL: https://issues.apache.org/jira/browse/CASSANDRA-6944
Project: Cassandra
Issue Type: Bug
Components: Core
Environment: SUSE Linux Enterprise 11 (64-bit)
Reporter: Erik Hansen
Priority: Minor
liveRatio calculation on an empty memtable results in a value of Infinity since
memtable.currentSize=0. Infinity then gets capped at the liveRatio max of 64.
{noformat}
WARN [MemoryMeter:1] 2014-03-19 09:26:59,483 Memtable.java (line 441) setting
live ratio to maximum of 64.0 instead of Infinity
INFO [MemoryMeter:1] 2014-03-19 09:26:59,485 Memtable.java (line 452)
CFS(Keyspace='system', ColumnFamily='compactions_in_progress') liveRatio is
64.0 (just-counted was 64.0). calculation took 7ms for 0 cells
{noformat}
Jumping liveRatio to the max value based on an empty Memtable leads to more
frequent flushing than may be necessary.
CASSANDRA-4243 previously addressed this issue, but was resolved as fixed by
CASSANDRA-3741. It does not appear this issue has been fixed as of 2.0.5
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