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Posted to commits@cassandra.apache.org by "Brandon Williams (JIRA)" <ji...@apache.org> on 2015/05/12 20:44:01 UTC

[jira] [Created] (CASSANDRA-9364) Add a warning when a high setting for rpc_max_threads is specified for HSHA

Brandon Williams created CASSANDRA-9364:
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             Summary: Add a warning when a high setting for rpc_max_threads is specified for HSHA
                 Key: CASSANDRA-9364
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9364
             Project: Cassandra
          Issue Type: Bug
            Reporter: Brandon Williams
             Fix For: 2.0.15


In CASSANDRA-7594 we allowed configuring this.  The problem is this was ignored for HSHA previously, so some people go through this scenario:

1. start with sync and 4000 threads

2. switch to HSHA, pre-7594

3. upgrade to a version after 7594, without changing this setting

4. experience awful performance due to insane thread contention



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