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From "Matt Stump (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-8380) Only record trace if query exceeds latency threshold.
Date Wed, 26 Nov 2014 21:03:12 GMT
Matt Stump created CASSANDRA-8380:
-------------------------------------

             Summary: Only record trace if query exceeds latency threshold.
                 Key: CASSANDRA-8380
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8380
             Project: Cassandra
          Issue Type: Improvement
            Reporter: Matt Stump
            Priority: Critical


Probabilistic trace isn't very useful because you're typically trying to only find the badly
performing queries which may only be .01% of requests. I would like to enable probabilistic
trace on a sample of queries, but then only record the trace if the request exceeded a time
threshold. This would allow us to more easily isolate performance problems.



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