It depends highly on what your requests look like, and which ones are slower. If you're request mix is heterogeneous, find the types of requests that seem to have the largest slowdown and let us know what they look like.
-Yonik On Tue, Nov 22, 2016 at 8:54 AM, Max Bridgewater <max.bridgewa...@gmail.com> wrote: > I migrated an application from Solr 4 to Solr 6. solrconfig.xml and > schema.xml are sensibly the same. The JVM params are also pretty much > similar. The indicces have each about 2 million documents. No particular > tuning was done to Solr 6 beyond the default settings. Solr 4 is running in > Tomcat 7. > > Early results seem to show Solr 4 outperforming Solr 6. The first shows an > average response time of 280 ms while the second averages at 430 ms. The > test cases were exactly the same, the machines where exactly the same and > heap settings exactly the same (Xms24g, Xmx24g). Requests were sent with > Jmeter with 50 concurrent threads for 2h. > > I know that this is not enough information to claim that Solr 4 generally > outperforms Solr 6. I also know that this pretty much depends on what the > application does. So I am not claiming anything general. All I want to do > is get some input before I start digging. > > What are some things I could tune to improve the numbers for Solr 6? Have > you guys experienced such discrepancies? > > Thanks, > Max.
