If I get it right, it's kind of per process setting swappiness. On Tue, Jun 12, 2012 at 3:57 AM, Li Li <fancye...@gmail.com> wrote:
> is this method equivalent to set vm.swappiness which is global? > or it can set the swappiness for jvm process? > > On Tue, Jun 12, 2012 at 5:11 AM, Mikhail Khludnev > <mkhlud...@griddynamics.com> wrote: > > Point about premature optimization makes sense for me. However some time > > ago I've bookmarked potentially useful approach > > > http://lucene.472066.n3.nabble.com/High-response-time-after-being-idle-tp3616599p3617604.html > . > > > > On Mon, Jun 11, 2012 at 3:02 PM, Toke Eskildsen <t...@statsbiblioteket.dk > >wrote: > > > >> On Mon, 2012-06-11 at 11:38 +0200, Li Li wrote: > >> > yes, I need average query time less than 10 ms. The faster the better. > >> > I have enough memory for lucene because I know there are not too much > >> > data. there are not many modifications. every day there are about > >> > hundreds of document update. if indexes are not in physical memory, > >> > then IO operations will cost a few ms. > >> > >> I'm with Michael on this one: It seems that you're doing a premature > >> optimization. Guessing that your final index will be < 5GB in size with > >> 1 million documents (give or take 900.000:-), relatively simple queries > >> and so on, an average response time of 10 ms should be attainable even > >> on spinning drives. One hundred document updates per day are not many, > >> so again I would not expect problems. > >> > >> As is often the case on this mailing list, the advice is "try it". Using > >> a normal on-disk index and doing some warm up is the easy solution to > >> implement and nearly all of your work on this will be usable for a > >> RAM-based solution, if you are not satisfied with the speed. Or you > >> could buy a small & cheap SSD and have no more worries... > >> > >> Regards, > >> Toke Eskildsen > >> > >> > > > > > > -- > > Sincerely yours > > Mikhail Khludnev > > Tech Lead > > Grid Dynamics > > > > <http://www.griddynamics.com> > > <mkhlud...@griddynamics.com> > -- Sincerely yours Mikhail Khludnev Tech Lead Grid Dynamics <http://www.griddynamics.com> <mkhlud...@griddynamics.com>
