Have you run IndexUpgrader? Index Format Changes
Solr 6 has no support for reading Lucene/Solr 4.x and earlier indexes. Be sure to run the Lucene IndexUpgrader included with Solr 5.5 if you might still have old 4x formatted segments in your index. Alternatively: fully optimize your index with Solr 5.5 to make sure it consists only of one up-to-date index segment. Regards, Jerome On Tue, Nov 22, 2016 at 10:48 PM, Yonik Seeley <ysee...@gmail.com> wrote: > 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. >
