[jira] [Commented] (SOLR-4940) Cluster crashed for *:* queries with large page number (OOM)

["Uwe Schindler (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-4940?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13687938#comment-13687938 ] 

Uwe Schindler commented on SOLR-4940:
-------------------------------------

see SOLR-1726

The main issue is: full-text search engine are only good in returning "top-ranking" results. If you increase the window of top-ranking results the underlying algortithms, which are optimized to do the "find top-n fast", will need lots of memeory and get slow.
                
> Cluster crashed for *:* queries with large page number (OOM)
> ------------------------------------------------------------
>
>                 Key: SOLR-4940
>                 URL: https://issues.apache.org/jira/browse/SOLR-4940
>             Project: Solr
>          Issue Type: Bug
>          Components: SolrCloud
>    Affects Versions: 4.0
>         Environment: One collection is sharded by 8 high mem machines.
> Each shard has one replica (additional 8 machines).
> The Solr instances are started with -Xmx16384m -Xms4096m.
> The index contains around 230-240 million documents.
> All Solr instances are connected to a ZooKeeper ensemble with 5 instances.
>            Reporter: Bjoern Ebers
>            Priority: Critical
>
> executing the query on the large index: q=*:*&page=1000&max=1000
> this cause to an OOM and crashed the whole cluster!

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