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https://issues.apache.org/jira/browse/SOLR-15416?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17348578#comment-17348578
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Andrzej Bialecki commented on SOLR-15416:
-----------------------------------------
This patch removes MetricsHistoryHandler, MetricsCollectorHandler, SolrCluster
/ SolrShardReporter and support for Solr-backed RRD database (with rrd4j
dependency).
If there are no objections I'll commit this shortly.
> Consider removing metrics history collection (and MetricsHistoryHandler)
> ------------------------------------------------------------------------
>
> Key: SOLR-15416
> URL: https://issues.apache.org/jira/browse/SOLR-15416
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Components: metrics
> Reporter: Andrzej Bialecki
> Assignee: Andrzej Bialecki
> Priority: Major
> Fix For: main (9.0)
>
> Attachments: SOLR-15416.patch
>
>
> Originally this functionality was meant to one day support more intelligent
> decisions in the autoscaling triggers that would react to the dynamics of the
> metrics changes. For this reason it was useful to keep track of the changes
> in the key metrics over time, without depending on any external systems.
> With the removal of autoscaling the usefulness of this handler (and the
> collection of metrics history inside Solr) is questionable.
> I propose to remove it in 9.0.
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