Steven Bower created SOLR-6259:
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Summary: Performance issue with large number of fields and values
when using copyFields
Key: SOLR-6259
URL: https://issues.apache.org/jira/browse/SOLR-6259
Project: Solr
Issue Type: Bug
Affects Versions: 4.8.1
Reporter: Steven Bower
Priority: Critical
When you have schema with a large enough number of fields (in my case around
250 fields) and you use copyFields to populate a number of fields (very few in
my case 3-4) you see a severe degradation in the performance of ingestion.
Tracking this down using a profiler found that in the lucene
Document.getField() was using 87% of all CPU time. As it turns out getField()
does an iteration over the list of fields in the Document returning the field
if the name matches.. Anyway in the case of copyFields with lots of values
getField() gets called alot...
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