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https://issues.apache.org/jira/browse/CASSANDRA-7778?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Brandon Williams updated CASSANDRA-7778:
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Labels: ponies (was: )
> Use PID to automatically scale thread pools and throttles.
> ----------------------------------------------------------
>
> Key: CASSANDRA-7778
> URL: https://issues.apache.org/jira/browse/CASSANDRA-7778
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Matt Stump
> Labels: ponies
> Fix For: 3.0
>
>
> Most customers deploy with non-optimal configurations. Examples include
> compaction throttle, streaming throttle, RPC requests threadpool size, which
> are set too aggressively or too conservatively. Often these problems aren't
> discovered until the cluster is in the field, and the problem will manifest
> as a critical outage. This results in the perception that Cassandra "falls
> over" without warning. Because it's difficult to ship with a set of tuning
> parameters that are valid for all or even most scenarios I propose that we
> use a PID algorithm to automatically tune several key parameters. The goal of
> the PID would be to keep load within a healthy range. If the user chooses
> they could always revert to explicitly defined configuration.
> http://en.wikipedia.org/wiki/PID_controller
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