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From "Hoss Man (JIRA)" <>
Subject [jira] Commented: (SOLR-571) LRUCache autowarmCount should support percentages
Date Tue, 20 Apr 2010 23:15:50 GMT


Hoss Man commented on SOLR-571:

bq. I can't see a problem here. 

me neither.

Noble: the percentages will be evaluated relative the current size of the cache -- for a full
cache, setting to 100% won't be any slower then setting autowarmCount == size.

what this changes is that people can set autowarmCount="50%" and then if the box stops serving
queries, there will be a gradualdrop off in the number of items inserted into hte cache due
to autowarming after each successive commit

> LRUCache autowarmCount should support percentages
> -------------------------------------------------
>                 Key: SOLR-571
>                 URL:
>             Project: Solr
>          Issue Type: Improvement
>            Reporter: Hoss Man
> a recent thread reminded me of an old idea that never got implemented...
> the autowarmCount for LRUCaches should support "percentages" which get evaluated relative
the current size of the cache when warming happens.  
> in this way, a Solr instance might be configured with autowarmCount="50%" to autowarm
the top half of the queries ... a master machine might be configured this way to give some
autowarming if it is inadvertently being queried, but things won't be maintained in the caches
in perpetuity ... each subsequent cache instance would have fewer and fewer of the "old" queries
warmed automatically.

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