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From Jonathan Ellis <>
Subject Re: Frequency of Flushing in 1.0
Date Fri, 24 Feb 2012 22:31:16 GMT

On Thu, Feb 23, 2012 at 6:05 PM, Xaero S <> wrote:
> I recently started using Cassandra 1.0.4 and observed that it takes a lot
> longer to flush the commit logs to SSTables, than was observed in versions
> 0.7.X and 0.8.X under constant load conditions with commitlog_sync as
> periodic and commitlog_sync_period_in_ms as 10000. As more data gets
> retained in commit logs, if a node goes down, it will take longer for
> commitlog replay. I am wondering about the configuration options in 1.0 that
> are related to commit log and memtable flushing. What are the settings that
> help flush memtables more frequently or less frequently under constant load
> conditions?
> Would appreciate any help on this subject.

Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support

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