Thank you Adrien, very much appreciated!!
Andreas
Adrien Grand <mailto:jpou...@gmail.com>
9 January 2016 at 19:22
Le ven. 8 janv. 2016 à 12:05, samt& sonders<kont...@samtundsonders.at> a
écrit :
It seems like a default QueryCache is already set for an IndexReader
acquired by the SearcherManager. Is there any information about the
default settings?
Query caching is indeed enabled by default since 5.4:
https://issues.apache.org/jira/browse/LUCENE-6784. The default cache is
tiny (32MB), you might want to make it a bit larger, especially if your
indices are large. For instance caching a single filter on an index that
contains 1B documents could require up to 120MB of RAM (worst case).
Beware to not make it too large however, memory is usually better spent on
the filesystem cache than on a query cache.
And are there any requirements I have to meet for the cache to work
properly beside than having a BooleanQuery with
BooleanClause.Occur.FILTER clauses?
Everything below a ConstantScoreQuery, a FILTER and a MUST_NOT clauses is
considered a filter. Additionally, if scores are not needed (for instance
if you're not sorting on the score), then the whole query is considered a
filter and could be cached.
samt & sonders <mailto:kont...@samtundsonders.at>
8 January 2016 at 18:04
Hi Adrien,
thanks for your response!
It seems like a default QueryCache is already set for an IndexReader
acquired by the SearcherManager. Is there any information about the
default settings?
And are there any requirements I have to meet for the cache to work
properly beside than having a BooleanQuery with
BooleanClause.Occur.FILTER clauses?
Cheers,
Andreas
Adrien Grand <mailto:jpou...@gmail.com>
7 January 2016 at 20:50
Hi Andreas,
The easiest way is to use the query cache through
IndexSearcher.setQueryCache. Then IndexSearcher will figure out by itself
which filters are worth caching.
Le jeu. 7 janv. 2016 à 13:30, samt & sonders <kont...@samtundsonders.at> a
samt & sonders <mailto:kont...@samtundsonders.at>
7 January 2016 at 19:30
Hi,
I'm changing my code from using
CachingWrapperQuery/CachingWrapperFilter to LRUQueryCache and I'm
running into some questions:
1.) what is the right way to use the LRUQueryCache:
Query myCacheQuery = queryCache.doCache(myQuery, defaultCachingPolicy);
a.) Doing this ones and re-use myCacheQuery
b.) Doing this every time (which means I always have to rebuild myQuery)
3.) Before I have created one CachingWrapperFilter for each Filter. Am
I now supposed to create one LRUQueryCache for all of my Filters
(which are now Queries) or can it still create one LRUQueryCache for
each Filter (does it make sense?)
Thanks for any help,
Andreas
---------------------------------------------------------------------
To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org
For additional commands, e-mail: java-user-h...@lucene.apache.org
------------------------------------------------------------------------
