FYI, I just opened https://issues.apache.org/jira/browse/SOLR-10122 for this -Yonik
On Fri, Feb 10, 2017 at 4:32 PM, Yonik Seeley <ysee...@gmail.com> wrote: > On Thu, Feb 9, 2017 at 6:58 AM, Bryant, Michael > <michael.bry...@kcl.ac.uk> wrote: >> Hi all, >> >> I'm converting my legacy facets to JSON facets and am seeing much better >> performance, especially with high cardinality facet fields. However, the one >> issue I can't seem to resolve is excessive memory usage (and OOM errors) >> when trying to simulate the effect of "group.facet" to sort facets according >> to a grouping field. > > Yeah, I sort of expected this... but haven't gotten around to > implementing something that takes less memory yet. > If you're faceting on A and sorting by unique(B), then memory use is > O(cardinality(A)*cardinality(B)) > We can definitely do a lot better. > > -Yonik
