Hi all,

We store Marvel-style timeseries data in Elasticsearch and make very heavy 
use of aggregations (all queries are effectively aggregations).

We've been playing around with the shard query cache and have a question.

Is there a reason the shard query cache is set to such a low level of JVM 
heap by default? 1% seems awfully low unless ES assumes most people aren't 
making heavy use of aggregations? Any harm in us significantly boosting 
this from 1% to say 15% of heap? Most of our machines have 30GB of RAM and 
heap at 50% of that (15GB) so the query cache is 150MB by default. Think 
we'd like to experiment growing that to at least 10% of heap to have 1GB in 
use for this cache.

Mike

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