[jira] [Commented] (CASSANDRA-11555) Make prepared statement cache size configurable

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

    [ https://issues.apache.org/jira/browse/CASSANDRA-11555?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15266223#comment-15266223 ] 

Benjamin Lerer commented on CASSANDRA-11555:
--------------------------------------------

The configuration options should be added to the {{yaml}} file with some documentation. 
I would, personally, follow the way it has been done for {{key_cache_size_in_mb}} with the default logic and validation in {{DatabaseDescriptor}}.
I think it is better to reject the input if it is invalid rather than overridding it silently.

> Make prepared statement cache size configurable
> -----------------------------------------------
>
>                 Key: CASSANDRA-11555
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-11555
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: CQL
>            Reporter: Robert Stupp
>            Assignee: Robert Stupp
>            Priority: Minor
>             Fix For: 3.x
>
>
> The prepared statement caches in {{org.apache.cassandra.cql3.QueryProcessor}} are configured using the formula {{Runtime.getRuntime().maxMemory() / 256}}. Sometimes applications may need more than that. Proposal is to make that value configurable - probably also distinguish thrift and native CQL3 queries (new applications don't need the thrift stuff).



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