Those terms could be coming from a lot of diff. places.
What size JVM heap, etc. are you giving your application? My guess is
your index is too big to fit into RAM, you probably need to use a
FSDirectory or give it more RAM, but it is hard to say for sure w/o
knowing more about the application.
See http://wiki.apache.org/lucene-java/BasicsOfPerformance for more on
performance.
-Grant
On Dec 10, 2007, at 2:56 PM, Bob Daha wrote:
Hello,
I'm building a ticketing system for my company and am using Lucene
for some of the more complicated queries. I'd say my application
differs from the typical lucene application in that my documents are
(re)-indexed more frequently, the query load is actually relatively
light, and most of the indexed document data is numerical. (ticket
id, owner id, date ranges, etc are numbers and there's just one
giant "text" searchable field.)
I just got an out of memory exception on my app. When I fired up
jhat, I was very surprised at the object allocation:
7862 instances of class org.apache.lucene.index.Term
7787 instances of class org.apache.lucene.index.TermInfo
504 instances of class org.apache.lucene.index.FieldInfo
224 instances of class org.apache.lucene.index.TermBuffer
79 instances of class org.apache.lucene.index.CompoundFileReader
$CSIndexInput
75 instances of class org.apache.lucene.index.SegmentTermEnum
70 instances of class org.apache.lucene.store.RAMFile
64 instances of class org.apache.lucene.store.RAMInputStream
63 instances of class org.apache.lucene.index.FieldInfos
20 instances of class com.facebook.tps_search_server.tps_search_ticket
20 instances of class
com.facebook.tps_search_server.tps_search_ticket$Isset
10 instances of class org.apache.lucene.index.IndexReader$FieldOption
9 instances of class org.apache.lucene.index.IndexFileDeleter$RefCount
8 instances of class org.apache.lucene.index.CompoundFileReader
$FileEntry
8 instances of class org.apache.lucene.index.CompoundFileWriter
$FileEntry
8 instances of class org.apache.lucene.index.SegmentReader$Norm
7 instances of class org.apache.lucene.document.FieldSelectorResult
5 instances of class org.apache.lucene.document.Field$TermVector
5 instances of class org.apache.lucene.queryParser.Token
4 instances of class org.apache.lucene.document.Field$Index
4 instances of class org.apache.lucene.search.FieldCacheImpl$Entry
3 instances of class com.facebook.thrift.protocol.TBinaryProtocol
3 instances of class com.facebook.thrift.transport.TSocket
3 instances of class org.apache.lucene.document.Field$Store
3 instances of class org.apache.lucene.index.SegmentInfos
3 instances of class org.apache.lucene.search.BooleanClause$Occur
2 instances of class com.facebook.thrift.protocol.TBinaryProtocol
$Factory
2 instances of class com.facebook.thrift.server.TThreadPoolServer
$WorkerProcess
2 instances of class com.facebook.thrift.transport.TTransportFactory
2 instances of class
org.apache.lucene.analysis.standard.StandardAnalyzer
2 instances of class org.apache.lucene.index.SegmentInfo
2 instances of class org.apache.lucene.queryParser.QueryParser
$Operator
2 instances of class org.apache.lucene.search.DefaultSimilarity
2 instances of class org.apache.lucene.search.FieldSortedHitQueue$2
2 instances of class org.apache.lucene.search.Sort
2 instances of class org.apache.lucene.search.SortField
2 instances of class org.apache.lucene.store.RAMDirectory
2 instances of class org.apache.lucene.store.SingleInstanceLockFactory
2 instances of class [Lorg.apache.lucene.search.SortField;
...
Any ideas on why I'd have so many Term and TermInfo objects? To
give you a little more insight into my application, worker threads
can be spawned by client requests that do one of 4 things - search,
index tickets, deindex tickets, or reindex tickets. (reindex a
ticket is basically deindex then index ticket) I'm using a
RAMDirectory for all my searches and updates although I have another
thread which backs this up to disc periodically.
Thanks,
B
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--------------------------
Grant Ingersoll
http://lucene.grantingersoll.com
Lucene Helpful Hints:
http://wiki.apache.org/lucene-java/BasicsOfPerformance
http://wiki.apache.org/lucene-java/LuceneFAQ
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