Aggregations are inherently slower than facets due to the increased
flexibility. Aggregations are composable and the fact that you can feed any
sub-aggregation with the documents that match a particular bucket makes the
life of the JVM a bit harder. Facets can actually almost be considered as
specialized aggregations (think of term_stats as an inlined stats
aggregation under terms).
That said, the lack of flexibility was also an issue with facets, and for
instance the term_stats facet did not have the same optimization as the
terms facet did. This is something that is much better with aggregations
since running terms or terms/stats actually use the same logic to build
buckets per term.
Another thing to consider is that you can do MANY more things with
aggregations: think of the top_hits, cardinality, percentiles, children,
... aggregations that did not have any equivalent with facets.
On Tue, Nov 4, 2014 at 5:43 PM, Ron Sher ron.sher@gmail.com wrote:
Hi,
I know that facets are deprecated and going to be removed eventually.
But, we currently use facets and we're fine with its current behavior.
My question is do aggregations offer any improvement in performance? Or
maybe a degradation due to added functionality?
Any experience?
We're starting to run queries in a loop that may suggest that facets are
actually (a bit) faster.
Thanks for your feedback,
Ron
--
You received this message because you are subscribed to the Google Groups
"elasticsearch" group.
To unsubscribe from this group and stop receiving emails from it, send an
email to elasticsearch+unsubscribe@googlegroups.com.
To view this discussion on the web visit
https://groups.google.com/d/msgid/elasticsearch/3d272687-cd03-45d4-972c-96570396b3e1%40googlegroups.com
https://groups.google.com/d/msgid/elasticsearch/3d272687-cd03-45d4-972c-96570396b3e1%40googlegroups.com?utm_medium=email&utm_source=footer
.
For more options, visit https://groups.google.com/d/optout.
--
Adrien Grand
--
You received this message because you are subscribed to the Google Groups "elasticsearch" group.
To unsubscribe from this group and stop receiving emails from it, send an email to elasticsearch+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/CAL6Z4j4HUyO96k2PLGhaVi6mEbq9xhsedr4fNnzx2F%2BRbL3NDQ%40mail.gmail.com.
For more options, visit https://groups.google.com/d/optout.