Index not fitting in memory (file-cache)

[Robert Brown]

Hi,

If my index data directory size is 70G, and I don't have 70G (plus heap, 
etc) in the system, this will occasionally affect search speed right?  
When Solr has to resort to reading from disk?

Before I go out and throw more RAM into the system, in the above 
example, what would you recommend?

Thanks,
Rob