I was under the impression that NRTCachingDirectory will instantiate an
MMapDirectory if a 64 bit platform is detected? Is this not the case?
On 2014/06/02, 2:09 PM, Tincu Gabriel wrote:
MMapDirectory will do the job for you. RamDirectory has a big warning in
the class description stating that the performance will get killed by an
index larger than a few hundred MB, and NRTCachingDirectory is a wrapper
for RamDirectory and suitable for low update rates. MMap will use the
system RAM to cache as much of the index it can and only hit disk when the
portion of the index you're trying to access isn't cached. I'd put my money
on switching directory implementations and see what kind of performance
gains that brings to the table.
