How to control max RAM size of a Solr process?

mtakahashi-ivi mtakahashi at
Wed Nov 25 04:35:28 EST 2015

>> Which is used for memory mapped file, I think. 
> No, that's wrong. Ignore it. 
That was correct. If I use solr.NRTCachingDirectoryFactory, FSDirectory
picks MMapDirectory, which uses mmap for 64bit JRE.

So off-heap memory is memory mapped file.

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