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. >
