Tomer Gabel wrote:
Since you're using an 8-core Mac Pro
I also assume you have some sort of RAID setup, which means your
storage
subsystem can physically handle more than one concurrent request,
which can
only come into play with multiple segments.
This is an important point: a multi-segment index naturally allows for
utilizing IO concurrency with multiple searches against a single
IndexReader. It's actually a reason against optimizing, strangely
enough.
However, as of Lucene 2.4 there's a new directory impl NIOFSDirectory
that on Unix should eliminate that bias (on Windows it will be slower,
due to problems with Sun JREs impl of nio APIs specific to Windows).
Also, you can and should open read-only IndexReaders since that also
removes further internal locking. If you do test these please report
back on
what difference they made...
Mike
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