You can also run vmstat or iostat and watch if the high latency queries correspond to lots of swap-ins.
Mike On Wed, Jun 24, 2009 at 3:54 PM, Nigel<nigelspl...@gmail.com> wrote: > This is interesting, and counter-intuitive: more queries could actually > improve overall performance. > > The big-index-and-slow-query-rate does describe our situation. I'll try > running some tests that run queries at various rates concurrent with > occasional big I/O operations that use the disk cache. (And then set > swappiness to zero if it looks like it will help.) > > Thanks, > Chris > > On Wed, Jun 24, 2009 at 10:46 AM, Michael McCandless < > luc...@mikemccandless.com> wrote: > >> So highish swappiness (the default in many linux distros) can really >> kill a search app that has 1) a big index, and 2) relatively slow >> query rate. If the query rate is fast, it should keep the pages hot >> and the OS shouldn't swap them out too badly. >> > --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
