Preventing field data from being loaded into page cache

[Justin Borromeo]

Is there any way to keep field data files out of the operating system's
page cache? We only use fdt for highlighting and don't need to keep it warm
in memory.  From what I understand, the operating system is in control of
what files get loaded into the page cache. Does Lucene have any mechanisms
to explicitly prevent them from being cached?  Is it even possible with
Java?

Thanks,
Justin Borromeo