You can use pcstat ( https://github.com/tobert/pcstat ) to get page cache statistics for files. I have used this app in the past to see which and how much Lucene indexes were on Linux page cache.
Edward On Fri, Sep 25, 2015 at 2:22 PM, Jeff Wartes <jwar...@whitepages.com> wrote: > > > I’ve been relying on this: > https://code.google.com/archive/p/linux-ftools/ > > > fincore will tell you what percentage of a given file is in cache, and > fadvise can suggest to the OS that a file be cached. > > All of the solr start scripts at my company first call fadvise > (FADV_WILLNEED) on all the files in the index directories. It works great > if you’re on a linux system. > > > > On 9/25/15, 8:41 AM, "Gili Nachum" <gilinac...@gmail.com> wrote: > > >Gonna try Mikhail suggestion, but just for fun you can also empirically > >"test" for how much of a file is in the oshr...@matrix.co.il cache with: > >time cat <file> > /dev/null > > > >The faster it completes the more blocks are cached you can take a baseline > >after manually purging of cache - don't recall the command. Note that > >running the command by itself encourages to cache the file. > >On Sep 25, 2015 12:39, "Aman Tandon" <amantandon...@gmail.com> wrote: > > > >> Awesome thank you Mikhail. This is what I was looking for. > >> > >> This was just a random question poped up in my mind. So I just asked > >>this > >> on the group. > >> > >> With Regards > >> Aman Tandon > >> > >> On Fri, Sep 25, 2015 at 2:49 PM, Mikhail Khludnev < > >> mkhlud...@griddynamics.com> wrote: > >> > >> > What about Linux: > >> > $less /proc/<PID>/maps > >> > $pmap <PID> > >> > > >> > On Fri, Sep 25, 2015 at 10:57 AM, Markus Jelsma < > >> > markus.jel...@openindex.io> > >> > wrote: > >> > > >> > > Hello - as far as i remember, you don't. A file itself is not the > >>unit > >> to > >> > > cache, but blocks are. > >> > > Markus > >> > > > >> > > > >> > > -----Original message----- > >> > > > From:Aman Tandon <amantandon...@gmail.com> > >> > > > Sent: Friday 25th September 2015 5:56 > >> > > > To: solr-user@lucene.apache.org > >> > > > Subject: How to know index file in OS Cache > >> > > > > >> > > > Hi, > >> > > > > >> > > > Is there any way to know that the index file/s is present in the > >>OS > >> > cache > >> > > > or RAM. I want to check if the index is present in the RAM or in > >>OS > >> > cache > >> > > > and which files are not in either of them. > >> > > > > >> > > > With Regards > >> > > > Aman Tandon > >> > > > > >> > > > >> > > >> > > >> > > >> > -- > >> > Sincerely yours > >> > Mikhail Khludnev > >> > Principal Engineer, > >> > Grid Dynamics > >> > > >> > <http://www.griddynamics.com> > >> > <mkhlud...@griddynamics.com> > >> > > >> > >
