Per Steffensen created SOLR-6810:
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Summary: Faster searching limited but high rows across many shards
all with many hits
Key: SOLR-6810
URL: https://issues.apache.org/jira/browse/SOLR-6810
Project: Solr
Issue Type: Improvement
Components: search
Reporter: Per Steffensen
Searching "limited but high rows across many shards all with many hits" is slow
E.g.
* Query from outside client: q=something&rows=1000
* Resulting in sub-requests to each shard something a-la this
** 1) q=something&rows=1000&fl=id,score
** 2) Request the full documents with ids in the global-top-1000 found among
the top-1000 from each shard
What does the subject mean
* "limited but high rows" means 1000 in the example above
* "many shards" means 200-1000 in our case
* "all with many hits" means that each of the shards have a significant number
of hits on the query
The problem grows on all three factors above
Doing such a query on our system takes between 5 min to 1 hour - depending on a
lot of things. It ought to be much faster, so lets make it.
For further detail see mail-thread "Slow searching limited but high rows across
many shards all with high hits" started 13/11-2014 on dev@lucene.apache.org
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