Hi, try to firstly have a look at http://wiki.apache.org/solr/SolrCaching the section on firstsearcher and warming. Search engines rely on caching, so first searches will be slow. I think to be fair testing it is necessary to warm up the search engine by sending most frequently used and/or most costly queries, then start your stress testing.
I used this tool http://code.google.com/p/httpstone/ to do stress testing. It allows you to create multiple threads sending queries to a server simultaneously, and records time taken to process each query in each thread. Hope it helps. sunnyfr wrote: > > Hi, > > I'm trying as well to stress test solr. I would love some advice to manage > it properly. > I'm using solr 1.3 and tomcat55. > Thanks a lot, > > > zqzuk wrote: >> >> Hi, I am doing a stress testing of my solr application to see how many >> concurrent requests it can handle and how long it takes. But I m not sure >> if I have done it in proper way... responses seem to be very slow >> >> My configuration: >> 1 Solr instance, using the default settings distributed in the example >> code, while I made two changes: >> <useColdSearcher>true</useColdSearcher> >> <maxWarmingSearchers>10</maxWarmingSearchers> >> As I thought the more searchers the more concurrent requests can be dealt >> with? >> >> There are 1.1 million documents indexed, and the platform is winxp sp2, >> duo core 1.8 GB machine with ram 2GB >> >> I used httpstone, a simple server load testing tool to create 100 workers >> (so 100 threads) each issuing one same query to the server. To deal with >> a single request of this query it took solr 2 seconds (with facet >> counts), and 7 documents are returned. I was assuming that only first >> request would take longer time and following requests should be almost >> instantaneous as the query is the same. But strange that the first >> response took as long as 20 seconds. >> >> It looked like that the 100 workers sent same request to solr and then >> all of a sudden solr server went silent. Only after 20 seconds some of >> these workers started to receive responses, but still very slow. >> >> clearly there I must have made something wrong with configuring solr >> server... Could you give me some pointers on how to improve the >> performance please? >> >> Many thanks! >> > > -- View this message in context: http://www.nabble.com/how-to-improve-concurrent-request-performance-and-stress-testing-tp15299687p20225293.html Sent from the Solr - User mailing list archive at Nabble.com.
