[jira] [Updated] (CASSANDRA-11593) getFunctions methods produce too much garbage

["Benjamin Lerer (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-11593?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Benjamin Lerer updated CASSANDRA-11593:
---------------------------------------
    Status: Patch Available  (was: Open)

> 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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