FAQ
bq. I'll do some profiling now again and let you know the results.

Great - it will be interesting to see the results. My guess, based on
the 2.9 new api profiling, is that your queries may not be agreeing with
some of the changes somehow. Along with the profiling, can you fill us
in on the query types you are using as well? (eg qualities)

And grab invocations if its possible.

--
- Mark

http://www.lucidimagination.com



Thomas Becker wrote:
Tests run on tmpfs:
config: impl=SeparateFile serial=false nThreads=4 iterations=100 bufsize=1024
poolsize=2 filelen=18920301
answer=850258539, ms=8090, MB/sec=935.4907787391842
config: impl=ChannelFile serial=false nThreads=4 iterations=100 bufsize=1024
poolsize=2 filelen=18920301
answer=850258903, ms=39444, MB/sec=191.8700030422878
config: impl=ChannelPread serial=false nThreads=4 iterations=100 bufsize=1024
poolsize=2 filelen=18920301
answer=850258903, ms=8504, MB/sec=889.9483066792098
config: impl=PooledPread serial=false nThreads=4 iterations=100 bufsize=1024
poolsize=2 filelen=18920301
answer=850258903, ms=9585, MB/sec=789.5795931142409

I did run some tests now with SimpleFSDirectory and MMapDirectory. Both are
faster than NIOFS and the response times improved. But it's still slower than 2.4.

I'll do some profiling now again and let you know the results.

Thanks again for all the great support to all who've answered.


Mark Miller wrote:
Can you run the following test on your RAMDISK?

http://people.apache.org/~markrmiller/FileReadTest.java

I've taken it from the following issue (in which NIOFSDirectory was
developed):
https://issues.apache.org/jira/browse/LUCENE-753



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