Oleg Anastasyev created CASSANDRA-6079:
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Summary: Memtables flush is delayed when having a lot of batchlog
activity, making node OOM
Key: CASSANDRA-6079
URL: https://issues.apache.org/jira/browse/CASSANDRA-6079
Project: Cassandra
Issue Type: Bug
Reporter: Oleg Anastasyev
Attachments: NoWaitBatchlogCompaction.diff
Both MeteredFlusher and BatchlogManager share the same OptionalTasks thread.
So, when batchlog manager processes its tasks no flushes can occur. Even more,
batchlog manager waits for batchlog CF compaction to finish.
On a lot of batchlog activity this prevents memtables from flush for a long
time, making the node OOM.
Fixed this by moving batchlog to its own thread and not waiting for batchlog
compaction to finish.
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