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Posted to commits@cassandra.apache.org by "Robbie Strickland (JIRA)" <ji...@apache.org> on 2014/09/13 22:54:33 UTC

[jira] [Created] (CASSANDRA-7930) Warn when evicting prepared statements from cache

Robbie Strickland created CASSANDRA-7930:
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             Summary: Warn when evicting prepared statements from cache
                 Key: CASSANDRA-7930
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7930
             Project: Cassandra
          Issue Type: Improvement
          Components: Core
            Reporter: Robbie Strickland
            Assignee: Robbie Strickland


The prepared statement cache is an LRU, with a max size of maxMemory / 256.  There is currently no warning when statements are evicted, which could be problematic if the user is unaware that this is happening.

At the very least, we should provide a JMX metric and possibly a log message indicating this is happening.  At some point it may also be worthwhile to make this tunable for users with large numbers of statements.



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