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From "Benjamin Lerer (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-11593) getFunctions methods produce too much garbage
Date Mon, 18 Apr 2016 08:43:25 GMT
Benjamin Lerer created CASSANDRA-11593:
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             Summary: getFunctions methods produce too much garbage
                 Key: CASSANDRA-11593
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-11593
             Project: Cassandra
          Issue Type: Improvement
            Reporter: Benjamin Lerer
            Assignee: Benjamin Lerer
             Fix For: 3.x


While profiling an heavy write workload on a single machine, I discover that calls to {{getFunctions}}
were producing a lot of garbage.
Internally, the getFunctions method use {{Iterators}} or {{Iterables}} functions that creates
new immutable collections at each level.
As {{getFunctions}} is called for each SELECT, INSERT, UPDATE or DELETE through the {{checkAccess}}
method the impact is not neglectable. 



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