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Posted to issues@lucene.apache.org by "Andrzej Bialecki (Jira)" <ji...@apache.org> on 2020/02/21 00:27:00 UTC

[jira] [Created] (SOLR-14275) Policy calculations are very slow for large clusters and large operations

Andrzej Bialecki created SOLR-14275:
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             Summary: Policy calculations are very slow for large clusters and large operations
                 Key: SOLR-14275
                 URL: https://issues.apache.org/jira/browse/SOLR-14275
             Project: Solr
          Issue Type: Bug
      Security Level: Public (Default Security Level. Issues are Public)
          Components: AutoScaling
    Affects Versions: 8.4.1, 7.7.2
            Reporter: Andrzej Bialecki


Replica placement calculations performed during collection creation take extremely long time (several minutes) when using a large cluster and creating a large collection (eg. 1000 nodes, 500 shards, 4 replicas).

Profiling shows that most of the time is spent in {{Row.computeCacheIfAbsent}}, which probably doesn't reuse this cache as much as it should.



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