On Mon, Oct 3, 2011 at 12:12 PM, <karan.jindal1...@rediffmail.com> wrote: > hi, > I am new to solr, so just want to clarify on few points > I ran the test on the machine with following specification:-Ram : 5GBdual > core : 2.66 GHzIndex Size : 10GB
* How much of the RAM is given to Solr, and how much is left for the OS disk cache. * Where are your indexing data coming from? If it is a database, is that running on the same machine? Is network speed a factor? > 1) Is the hard disk read time is a bottle neck on solr performance? I ran few > tests using "jmeter" and analysis the system resources using "dstat". what I > found is that cpu is 50% idle, 40% waiting and 10% actual user processing all > the time. why cpu is in constant waiting state? Disk read speed can be a factor, especially if there is not enough RAM left for the OS disk cache. > 2) Atmost how many cores will give reasonable performance (under 2 second ) > on the index of 10GB? This depends on a lot of factors, including RAM, your data sources, etc., but with plenty of RAM, databases on separate machines, and assuming that the index can be sharded (merging after indexing is also possible), we were seeing the indexing speed increase linearly with the number of cores, up to at least 10 cores. Regards, Gora
