Hi, With debugQuery you see the timings. What component spends the most time? With shards.info=true you see what shard is the slowest, if your index is sharded. With echoParams=all you get the full list of query parameters in use, perhaps you spot something? If you start Solr with -v option then you get more verbose logging in solr.log which may help
Can you share with us how your query looks like, including all parameters from the <params> section with echoParams=all enabled? -- Jan Høydahl, search solution architect Cominvent AS - www.cominvent.com > 23. aug. 2018 kl. 11:09 skrev zhenyuan wei <tins...@gmail.com>: > > Hi all, > I do care query performance, but do not know how to find out the reason > why a query so slow. > *How to trace one query?*the debug/debugQuery info are not enough to find > out why a query is slow。 > > > Thanks a lot~