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https://issues.apache.org/jira/browse/CASSANDRA-4690?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jonathan Ellis resolved CASSANDRA-4690.
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Resolution: Duplicate
see CASSANDRA-3741
> Delete only workload OOM cassandra
> ----------------------------------
>
> Key: CASSANDRA-4690
> URL: https://issues.apache.org/jira/browse/CASSANDRA-4690
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Affects Versions: 1.0.11
> Environment: OpenJDK 6
> Reporter: Radim Kolar
> Priority: Blocker
>
> Restart cassandra node and run delete only workload against CF. No other
> update operations like insert or delete are used against that CF.
> Cassandra do not counts deletes in serialized/live bytes. It counts them just
> as ops. After some time cassandra will run almost out of Java heap space and
> tries to do emergency flush, which will not be done at CF with deletes
> because cassandra thinks that it has 0 live bytes. This will result in OOM
> after while, but usually cassandra just hangs.
> To make this workload finish, you have to issue periodic nodetool flush
> commands. Their flueshes on that CF looks:
> INFO [RMI TCP Connection(69)-64.6.108.239] 2012-09-19 18:22:46,366
> ColumnFamilyStore.java (line 705) Enqueuing flush of
> Memtable-sipdb@359811109(0/0 serialized/live bytes, 688056 ops)
> INFO [FlushWriter:13] 2012-09-19 18:22:46,366 Memtable.java (line 246)
> Writing Memtable-sipdb@359811109(0/0 serialized/live bytes, 688056 ops)
> INFO [FlushWriter:13] 2012-09-19 18:22:49,719 Memtable.java (line 283)
> Completed flushing /var/lib/cassandra/data/test/sipdb-hd-4726-Data.db
> (37155024 bytes)
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