Robert Engels wrote:
It seems that in a highly multi-threaded server this synchronized method
could lead to significant blocking when the documents are being retrieved?
Perhaps, but I'd prefer to wait for someone to demonstrate this as a
performance bottleneck before adding another ThreadLocal.
Peter Keegan has recently demonstrated pretty good concurrency using
mmap directory on four and eight CPU systems:
http://www.mail-archive.com/java-user@lucene.apache.org/msg05074.html
Peter also wondered if the SegmentReader.document(int) method might be a
bottleneck, and tried patching it to run unsynchronized:
http://www.mail-archive.com/java-user@lucene.apache.org/msg05891.html
Unfortunately that did not improve his performance:
http://www.mail-archive.com/java-user@lucene.apache.org/msg06163.html
Doug
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