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> >> > >>
