[
https://issues.apache.org/jira/browse/CASSANDRA-6944?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14102704#comment-14102704
]
Aleksey Yeschenko commented on CASSANDRA-6944:
----------------------------------------------
[~graham sanderson] opened CASSANDRA-7796.
> 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
> Assignee: Aleksey Yeschenko
> Priority: Minor
> Labels: memtables
>
> 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
--
This message was sent by Atlassian JIRA
(v6.2#6252)
