David Smiley created SOLR-14472:
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Summary: Autoscaling "cores" preference should count all cores,
not just loaded.
Key: SOLR-14472
URL: https://issues.apache.org/jira/browse/SOLR-14472
Project: Solr
Issue Type: Improvement
Security Level: Public (Default Security Level. Issues are Public)
Components: AutoScaling
Reporter: David Smiley
Assignee: David Smiley
The AutoScaling "cores" preference works by counting the core names that are
retrievable via the metrics API. 99% of the time, that's fine but it does not
count unloaded transient cores that are also tracked by the CoreContainer,
which I think should be counted as well. Most users don't have such cores so
it won't affect them.
Furthermore, instead of counting them by asking the metrics API to return each
loaded core name, it should use the {{CONTAINER.cores}} prefix set of counters.
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