Hi,
I'm trying to understand what is the liveRatio and if I have to care about it.
I found some reference on the web and if I understand them, the liveRatio
represents the Memtable size divided by the amount of data serialized on the
disk. Is it the truth?
When I see the following log, what can I deduce about it ?
INFO [MemoryMeter:1] 2014-08-26 19:02:41,047 Memtable.java (line 481)
CFS(Keyspace='ufapi', ColumnFamily='users') liveRatio is 8.52308554793235
(just-counted was 8.514143642185562). calculation took 3613ms for 272646 cells
INFO [MemoryMeter:1] 2014-08-26 18:36:09,965 Memtable.java (line 481)
CFS(Keyspace='system', ColumnFamily='compactions_in_progress') liveRatio is
40.1893491
1242604 (just-counted was 16.37869822485207). calculation took 0ms for 7 cells
According to my read, the liveRatio is set between 1 and 64. If My liveRatio is
around 64, should I care about some things?
Does Cassandra use the liveRatio for some internal task or it is just a metric?
Regards,
Eric
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