See the online help in cassandra-cli on CREATE / UPDATE COLUMN FAMILY for min_compaction_threshold and max_compaction_threshold.
Also look in the cassandra.yaml file for information on configuring compaction. If compaction is really hurting your system it may be a sign that you need to scale up or make some other changes. What does your cluster look like ? # nodes, load per node, throughput, # clients etc Cheers ----------------- Aaron Morton Freelance Cassandra Developer @aaronmorton http://www.thelastpickle.com On 22 Jul 2011, at 00:30, lebron james wrote: > Hi! Tell me please, how i can manage compacting process, turn them off and > start manualy when i need. How i can improve performance of compacting > process? Thanks!