system CFs default to large memtable throughputs on large heaps ---------------------------------------------------------------
Key: CASSANDRA-2148 URL: https://issues.apache.org/jira/browse/CASSANDRA-2148 Project: Cassandra Issue Type: Bug Affects Versions: 0.7.0 Reporter: Matthew F. Dennis Assignee: Matthew F. Dennis Fix For: 0.7.2 The default memtableThroughputInMB is calculated now based on the heap size. Most people running with a large heap in production explicitly set it for their memtable(s). However, the the CFs in the system keyspace still default to the calculated value which on a large heap can be quite large. HintsColumnFamily is really the only problematic one though as the others are flushed afters changes to them. we should: 1) set the throughput on the hints CF to a reasonable max and min value - min(256, max(32, normalDefault/2)) 2) set the throughput on the other system CFs to some small constant value (just as a safety); 8M sounds good -- This message is automatically generated by JIRA. - For more information on JIRA, see: http://www.atlassian.com/software/jira