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
