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.


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

To unsubscribe, e-mail:
For additional commands, e-mail:

Reply via email to