[ https://issues.apache.org/jira/browse/LUCENE-8598?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16716644#comment-16716644 ]
ASF subversion and git services commented on LUCENE-8598: --------------------------------------------------------- Commit ef61b547b175f9fbb63dd9fca78f7984f4f72be2 in lucene-solr's branch refs/heads/jira/http2 from [~simonw] [ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=ef61b54 ] LUCENE-8599: Use sparse bitset to store docs in SingleValueDocValuesFieldUpdates Using a sparse bitset in SingleValueDocValuesFieldUdpates allows storing which documents have an update much more efficient and prevents the need to sort the docs array altogether that showed to be a significant bottleneck in LUCENE-8598. Using the spares bitset yields another 10x performance improvement in applying updates versus the changes proposed in LUCENE-8598. > Improve field updates packed values > ----------------------------------- > > Key: LUCENE-8598 > URL: https://issues.apache.org/jira/browse/LUCENE-8598 > Project: Lucene - Core > Issue Type: Improvement > Reporter: Simon Willnauer > Priority: Major > Fix For: master (8.0), 7.7 > > Time Spent: 1h 20m > Remaining Estimate: 0h > > 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. -- 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