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.
