Yonik, Am running both my server and client on ubuntu machines. The client is on a different box. The server CPU and RAM are both well below 50%.
Girish Redekar http://girishredekar.net On Fri, Nov 27, 2009 at 10:07 PM, Yonik Seeley <yo...@lucidimagination.com>wrote: > On Fri, Nov 27, 2009 at 9:30 AM, Girish Redekar > <girish.rede...@aplopio.com> wrote: > > Hi > > > > I'm testing my Solr instance with multiple simultaneous requests. Here's > my > > test. > > > > For an index of ~200K docs, I query Solr with 10 simultaneous threads. > Can > > someone help me explain/improve the following observations: > > > > 1) Solr doesn't seem to use all the available CPU to improve response > times > > (query times are good, but the time required to return documents aren't > so > > good). My CPU seems to be running at ~30% > > 2) As expected, time for response increases as the num of requested > results > > increase. What's surprising (and perplexing) is that Solr seems to use > > *more* of the CPU when I'm requesting *fewer* docs. Consequently, its > > performance in returning a larger result set is very bad > > This may point to another bottleneck - if the OS is low on free RAM, > it could be disk IO. > If this is on Windows, you could have contention reading the index files. > Otherwise, you may have a bottleneck in network IO. Is the client you > are testing with on the same box? > Is this Solr 1.4? > > -Yonik > http://www.lucidimagination.com >
