Lower memory consumption used by index sampling -----------------------------------------------
Key: CASSANDRA-3743 URL: https://issues.apache.org/jira/browse/CASSANDRA-3743 Project: Cassandra Issue Type: Improvement Components: Core Affects Versions: 1.0.6 Reporter: Radim Kolar currently j.o.a.c.io.sstable.indexsummary is implemented as ArrayList of KeyPosition (RowPosition key, long offset)i propose to change it to: RowPosition keys[] long offsets[] and use standard binary search on it. This will lower number of java objects used per entry from 2 (KeyPosition + RowPosition) to 1 (RowPosition). For building these arrays convenient ArrayList class can be used and then call to .toArray() on it. This is very important because index sampling uses a lot of memory on nodes with billions rows -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira