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From Chris Hostetter <hossman_luc...@fucit.org>
Subject Re: Date faceting and memory leaks
Date Tue, 18 May 2010 01:03:13 GMT
: Cache settings:
:   <filterCache class="solr.LRUCache" size="1512000" initialSize="1512000"
: autowarmCount="1280"/>

that's a monster filterCache ...i can easly imagine it causing an OOM if 
your heap is only 5G.

: The date rounding suggest is a very good one, I will need to rerun the test
: and report back on the cache setting. I remember my filterCache hit ratio is
: around 0.7. I did use the tagged results for multi-select display of facet

a "hit ratio" or "0.7" ratio, or "0.7% hit rate"? ... with that many 
unique facet queries, i can't imaging you were getting a 70% hit rate.  
I'm betting if you monitor that filterCache size and hit rate as you run 
your test you'll see it just grow and grow until the OOM.  and if you 
analyze the heap dumps you'll probably see the cache hanging on to a ton 
of DocSets that will never be used again.

: values but in this case there is no fq in the load test request URL.

I've never tested this, so i can't say for sure, but if it turns out that 
the filterCache is not your problem, then perhaps there is soemthing wonky 
with the filterquery exclusion code in cases like this -- where you 
explicilty exlucde a taged fq but that fq doesn't exist.  the qya to rule 
it out would be to remove the exlcusion from your configs and test it that 
way to see if the behavior is hte same.


-Hoss


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