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From "C. Scott Andreas (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-12028) Proposal to change concurrent_* and native_transport_max_threads defaults
Date Mon, 19 Nov 2018 02:25:01 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-12028?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

C. Scott Andreas updated CASSANDRA-12028:
-----------------------------------------
    Component/s: Configuration

> Proposal to change concurrent_* and native_transport_max_threads defaults
> -------------------------------------------------------------------------
>
>                 Key: CASSANDRA-12028
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-12028
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Configuration
>            Reporter: Robert Stupp
>            Priority: Minor
>
> The current recommendations in c.yaml regarding {{concurrent_reads/writes/counter_writes/materialized_view_writes}}
and {{native_transport_max_threads}} feel oversized.
> While working on some load/stress tests, reducing these to the number of CPUs and also
lowering {{native_transport_max_threads}} to 2xCPUs had no influence to the actual performance
but reduced the risk of allocating too many threads when a node ran into a longer GC and requests
against that node piled up.



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