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Radim Kolar commented on CASSANDRA-3743: ---------------------------------------- Its all about nuking KeyPosition class > 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