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From "Benjamin Coverston (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-2470) Secondary Indexes Build Very Slowly
Date Thu, 14 Apr 2011 15:31:05 GMT
Secondary Indexes Build Very Slowly
-----------------------------------

                 Key: CASSANDRA-2470
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2470
             Project: Cassandra
          Issue Type: Improvement
            Reporter: Benjamin Coverston


While running repair I noticed that the time it took to run was easily dominated by building
the secondary indexes. They currently build at a rate of < 200KB/Second. This means that
indexing a 500MB file takes nearly an hour to index the file.

Because this happens on the compaction thread it also causes repair to back up in general,
which for very active systems is a very bad thing.

I suggest we look at it in the hope that we can improve the rate in which we build the indexes
by an order of magnitude.

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