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From Erick Erickson <>
Subject Re: SolrCloud performance issues regarding hardware configuration
Date Fri, 18 Jul 2014 15:10:29 GMT
Right, this is the worst kind of use-case for faceting. You have
150M docs/shard and are asking up to 125M buckets to count
into, plus control structures. Performance of this (even without OOMs)
will be a problem. Having multiple queries execute this simultaneously
will increase memory usage.

So your choices are either to increase memory (a lot) or not do this.
It's a valid question whether this is useful information to present to a
(or are you doing some kind of analytics here?).

This feels like an XY problem. What is the use-case you're trying to
support with this?


On Fri, Jul 18, 2014 at 5:04 AM, search engn dev <>

> out of 700 million documents 95-97% values are unique approx.
> My facet query is :
> http://localhost:8983/solr/select?q=*:*&rows=0&facet=true&facet.limit=10000&facet.field=user_digest
> Above query throws OOM exception as soon as fire it to solr.
> --
> View this message in context:
> Sent from the Solr - User mailing list archive at

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