What requirements ParallelMultiSearch to JVM? What the adjustments of memory and for processes of system are required? If it somebody knows, let it can be on an example anyone of Unix System.
ParallelMultiSearcher simply spins a separate thread for each index and waits for the results from all threads before returning results.
Depending on your hardware, you may or may not receive performance benefits over using plain MultiSearcher. You would likely need each index on a separate disk so that you would benefit from parallel I/O.
Beyond standard multi-threaded Java concerns, there is nothing special about ParallelMultiSearcher, and tuning would be dependent on your environment.
Erik
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