Some function queries also use the field cache. I *think* those usually use the segment level cache, but I'm not sure.
On Wed, Sep 19, 2012 at 4:36 PM, Yonik Seeley <yo...@lucidworks.com> wrote: > The other thing to realize is that it's only "insanity" if it's > unexpected or not-by-design (so the term is rather mis-named). > It's more for core developers - if you are just using Solr without > custom plugins, don't worry about it. > > -Yonik > http://lucidworks.com > > > On Wed, Sep 19, 2012 at 3:27 PM, Tomás Fernández Löbbe > <tomasflo...@gmail.com> wrote: > > Hi Aaron, here there is some information about the "insanity count": > > http://wiki.apache.org/solr/SolrCaching#The_Lucene_FieldCache > > > > As for the SUBREADER type, the javadocs say: > > "Indicates an overlap in cache usage on a given field in sub/super > readers." > > > > This probably means that you are using the same field for faceting and > for > > sorting (tf_normalizedTotalHotttnesss), sorting uses the segment level > > cache and faceting uses by default the global field cache. This can be a > > problem because the field is duplicated in cache, and then it uses twice > > the memory. > > > > One way to solve this would be to change the faceting method on that > field > > to 'fcs', which uses segment level cache (but may be a little bit > slower). > > > > Tomás > > > > > > On Wed, Sep 19, 2012 at 3:16 PM, Aaron Daubman <daub...@gmail.com> > wrote: > > > >> Hi all, > >> > >> In reviewing a solr instance with somewhat variable performance, I > >> noticed that its fieldCache stats show an insanity_count of 1 with the > >> insanity type SUBREADER: > >> > >> ---snip--- > >> insanity_count : 1 > >> insanity#0 : SUBREADER: Found caches for descendants of > >> ReadOnlyDirectoryReader(segments_k > >> _6h9(3.3):C17198463)+tf_normalizedTotalHotttnesss > >> 'ReadOnlyDirectoryReader(segments_k > >> > >> > _6h9(3.3):C17198463)'=>'tf_normalizedTotalHotttnesss',float,org.apache.lucene.search.FieldCache.NUMERIC_UTILS_FLOAT_PARSER=>[F#1965982057 > >> 'ReadOnlyDirectoryReader(segments_k > >> > >> > _6h9(3.3):C17198463)'=>'tf_normalizedTotalHotttnesss',float,null=>[F#1965982057 > >> > >> > 'MMapIndexInput(path="/io01/p/solr/playlist/a/playlist/index/_6h9.frq")'=>'tf_normalizedTotalHotttnesss',float,org.apache.lucene.search.FieldCache.NUMERIC_UTILS_FLOAT_PARSER=>[F#1308116426 > >> ---snip--- > >> > >> How can I decipher what this means and what, if anything, I should do > >> to fix/improve the "insanity"? > >> > >> Thanks, > >> Aaron > >> >
