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Shawn Heisey commented on SOLR-12233: ------------------------------------- Thanks for your analysis, [~dsmiley]. This issue has been an education! What do you think of the idea of configuration to turn off implicit handlers? (needs a new issue) For instance, I have no need for /update/csv, /update/json, or /update/json/docs. I don't think the admin UI needs those handlers either. Disabling some of the implicit handlers would make Solr start a little bit faster. For my servers, with a couple dozen cores, the difference would be very small, but when there are thousands of cores, it could really add up. I was thinking maybe we could create an umbrella issue for efficiency/scalability improvements outside of SolrCloud. The issue I've just described, and this issue, could be children of the umbrella issue. > QParserPlugin maintains a list of classes recreated every time a Solrcore > object is created > ------------------------------------------------------------------------------------------- > > Key: SOLR-12233 > URL: https://issues.apache.org/jira/browse/SOLR-12233 > Project: Solr > Issue Type: Improvement > Security Level: Public(Default Security Level. Issues are Public) > Affects Versions: 7.1.1 > Reporter: Jeff Miller > Assignee: Erick Erickson > Priority: Minor > Labels: Performance, qparserplugin > Time Spent: 10m > Remaining Estimate: 0h > > QParserPlugin maintains a static map of Class Names to Class objects and > everytime we create a SolrCore object this causes a lot of overhead doing > classloader lookups. Our system runs a lot of cores and the classloader gets > bogged down when a lot of threads are creating solrcore objects. > There's no need to create these objects every time, similar classes such as > TransformerFactory store the object one time and reference it over and over > again -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org