Improving the performance of group.ngroups=true when there are a lot of unique
groups
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Key: SOLR-2963
URL: https://issues.apache.org/jira/browse/SOLR-2963
Project: Solr
Issue Type: Improvement
Components: SearchComponents - other
Affects Versions: 3.5
Environment: Linux (Debian 6) 64bit, Java 6, 21GB RAM (Xmx), Solr 3.5
Reporter: Michael Jakl
The performance of computing the total number of groups (by setting
group.ngroups=true) degrades badly when there are many unique groups.
It would be very useful to have an adequate number of groups to provide good
means for paging through the results etc.
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