GitHub user s1monw opened a pull request: https://github.com/apache/lucene-solr/pull/521
LUCENE-8598: Improve field updates packed values DocValuesFieldUpdats are using compact settings for packet ints that causes dramatic slowdowns when the updates are finished and sorted. Moving to the default accepted overhead ratio yields up to 4x improvements in applying updates. This change also improves the packing of numeric values since we know the value range in advance and can choose a different packing scheme in such a case. Overall this change yields a good performance improvement since 99% of the times of applying DV field updates are spend in the sort method which essentially makes applying the updates 4x faster. You can merge this pull request into a Git repository by running: $ git pull https://github.com/s1monw/lucene-solr improve_packing Alternatively you can review and apply these changes as the patch at: https://github.com/apache/lucene-solr/pull/521.patch To close this pull request, make a commit to your master/trunk branch with (at least) the following in the commit message: This closes #521 ---- commit e6aecc1994f4116f92d51a3841f2cda01e73e70b Author: Simon Willnauer <simonw@...> Date: 2018-12-09T18:13:20Z LUCENE-8598: Improve field updates packed values DocValuesFieldUpdats are using compact settings for packet ints that causes dramatic slowdowns when the updates are finished and sorted. Moving to the default accepted overhead ratio yields up to 4x improvements in applying updates. This change also improves the packing of numeric values since we know the value range in advance and can choose a different packing scheme in such a case. Overall this change yields a good performance improvement since 99% of the times of applying DV field updates are spend in the sort method which essentially makes applying the updates 4x faster. ---- --- --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org