Erick I don't think solr was mentioned here.

On Thu, Jan 18, 2018 at 8:03 AM, Erick Erickson <> wrote:
> My first question is always "are you running the Solr CPUs flat out?".
> My guess in this case is that the indexing client is the same and the
> problem is in Solr, but it's worth checking whether the clients are
> just somehow not delivering docs as fast as they were before.
> My suspicion is that the indexing client hasn't changed, but it's
> worth checking.
> Best,
> Erick
> On Thu, Jan 18, 2018 at 2:23 AM, Rob Audenaerde
> <> wrote:
>> Hi all,
>> We recently upgraded from Lucene 6.6 to 7.1.  We see a significant drop in
>> indexing performace.
>> We have a-typical use of Lucene, as we (also) index some database tables
>> and add all the values as AssociatedFacetFields as well. This allows us to
>> create pivot tables on search results really fast.
>> These tables have some overlapping columns, but also disjoint ones.
>> We anticipated a decrease in index size because of the sparse docvalues. We
>> see this happening, with decreases to ~50%-80% of the original index size.
>> But we did not expect an drop in indexing performance (client systems
>> indexing time increased with +50% to +250%).
>> (Our indexing-speed used to be mainly bound by the speed the Taxonomy could
>> deliver new ordinals for new values, currently we are investigating if this
>> is still the case, will report later when a profiler run has been done)
>> Does anyone know if this increase in indexing time is to be expected as
>> result of the sparse docvalues change?
>> Kind regards,
>> Rob Audenaerde
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