Maybe you should turn on Garbage Collection logging to confirm that you are running into some kind of memory problem. (start JVM with -verbose:gc) If the GC is running very often as soon as your indexing process slows down, i would suggest you to create a heapdump and check what the memory is used for.

Am 23.11.2013 16:45, schrieb Igor Shalyminov:
So we return to the initially described setup: multiple parallel workers, each making 
"parse + indexWriter.addDocument()" for single documents with no 
synchronization at my side. This setup was also bad on memory consumption and thread 
blocking, as I reported.

Or did I misunderstand you?



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