Cool, Toke and Shawn! That's exactly what I was looking for. I'll have a look at those resources and if something is yet unclear I'll open a thread for it.
Thanks for the information, Eric On Wed, Oct 7, 2015 at 10:29 AM, Shawn Heisey <apa...@elyograg.org> wrote: > On 10/7/2015 4:03 AM, Eric Torti wrote: > > I'm sorry to diverge this thread a little bit. But could please point me > to > > resources that explain deeply how this process of OS using the non-java > > memory to cache index data? > > > >> Whatever RAM is left over after you give 12GB to Java for Solr will be > >> used automatically by the operating system to cache index data on the > >> disk. Solr is completely reliant on that caching for good performance. > > > > I'm puzzled as to why the physical memory of solr's host machine is > always > > used up and I think some resources on that would help me understand it. > > Toke's reply is excellent, and describes the situation from Lucene's > perspective. Solr is a Lucene program, so the same information applies. > > Here's more generic information on how the OS uses memory for caching > for most programs: > > https://en.wikipedia.org/wiki/Page_cache > > Note that some programs, like MySQL and Microsoft Exchange, skip the OS > cache and take care of caching internally. > > Thanks, > Shawn > >
