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From "Benjamin Lerer (JIRA)" <>
Subject [jira] [Commented] (CASSANDRA-11593) getFunctions methods produce too much garbage
Date Fri, 29 Apr 2016 12:31:12 GMT


Benjamin Lerer commented on CASSANDRA-11593:

I pushed a new patch for 3.0.x.

> getFunctions methods produce too much garbage
> ---------------------------------------------
>                 Key: CASSANDRA-11593
>                 URL:
>             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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