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Posted to solr-user@lucene.apache.org by "Schwartz, Tony" <To...@cinbell.com> on 2020/08/11 19:03:21 UTC

massive numbers of threads with name that includes commitScheduler

From time to time I see massive number of threads that have commitScheduler in the name of the thread.  When this happens, solr is pegging the disk IO and querying becomes unusable for a while.  I have many collections (240 shards).  It happens once in a while, I'm really not sure what is causing it or how to prevent it.  Any thoughts on where I can look?  I have set the mergeScheduler as such:

       <mergeScheduler class="org.apache.lucene.index.ConcurrentMergeScheduler">
                <int name="maxMergeCount">6</int>
                <int name="maxThreadCount">1</int>
        </mergeScheduler>

Thank you!

Tony Schwartz