Hi, We upgraded to Solr 4.0 Alpha and our CPU usage shot off to 400%.In profiling we are getting following trace.
- *100.0%* - *java.lang*.Thread.run<https://rpm.newrelic.com/accounts/132291/applications/834717/profiles/1266#> - *42 Collapsed methods (show)<https://rpm.newrelic.com/accounts/132291/applications/834717/profiles/1266#> * - *98.0%* - *org.apache.lucene.index* .DocumentsWriter.updateDocument<https://rpm.newrelic.com/accounts/132291/applications/834717/profiles/1266#> - *77.0%* - *org.apache.lucene.index* .DocumentsWriterPerThread.updateDocument<https://rpm.newrelic.com/accounts/132291/applications/834717/profiles/1266#> - *76.0%* - *org.apache.lucene.index* .DocFieldProcessor.processDocument<https://rpm.newrelic.com/accounts/132291/applications/834717/profiles/1266#> - *76.0%* - *org.apache.lucene.index* .DocInverterPerField.processFields<https://rpm.newrelic.com/accounts/132291/applications/834717/profiles/1266#> - *36.0%* - *org.apache.lucene.analysis.miscellaneous* .TrimFilter.incrementToken<https://rpm.newrelic.com/accounts/132291/applications/834717/profiles/1266#> - *35.0%* - *org.apache.lucene.analysis.core* .LowerCaseFilter.incrementToken<https://rpm.newrelic.com/accounts/132291/applications/834717/profiles/1266#> - *17.0%* - *org.apache.lucene.analysis.ngram* .NGramTokenFilter.incrementToken<https://rpm.newrelic.com/accounts/132291/applications/834717/profiles/1266#> - *9.2%* - *org.apache.lucene.util* .AttributeSource.clearAttributes<https://rpm.newrelic.com/accounts/132291/applications/834717/profiles/1266#> - *34.0%* - *org.apache.lucene.index* .TermsHashPerField.add<https://rpm.newrelic.com/accounts/132291/applications/834717/profiles/1266#> - *12.0%* - *org.apache.lucene.index* .FreqProxTermsWriterPerField.addTerm<https://rpm.newrelic.com/accounts/132291/applications/834717/profiles/1266#> - *11.0%* - *org.apache.lucene.index* .FreqProxTermsWriterPerField.writeProx<https://rpm.newrelic.com/accounts/132291/applications/834717/profiles/1266#> - *6.4%* - *org.apache.lucene.index* .TermsHashPerField.writeVInt<https://rpm.newrelic.com/accounts/132291/applications/834717/profiles/1266#> - *11.0%* - * org.apache.lucene.analysis.tokenattributes* .CharTermAttributeImpl.fillBytesRef<https://rpm.newrelic.com/accounts/132291/applications/834717/profiles/1266#> - *15.0%* - *org.apache.lucene.index* .DocumentsWriterFlushControl.obtainAndLock<https://rpm.newrelic.com/accounts/132291/applications/834717/profiles/1266#>
