It's not exactly an answer, but we've also experienced slowness when trying to upgrade. Our testing showed we started seeing degraded performance from v8.6 - if 8.5.2 would be "new enough" for you, it may be worth testing performance with that version to see if it's any better.
On Fri, 12 Nov 2021 at 10:58, VIshal Patel <vishalpatel202...@outlook.com> wrote: > Hello, > > > We have upgraded Solr from 6.1.0 to 8.9.0. After upgrade we are facing > slowness when returning field with *. > > > Solr 8.9.0 [300 milliseconds] > http://XX.XX.XX.XX:XXXX > /solr/forms/select?q=id%3AFORM27248682964899&fl=*ORI_FORMTITLE> > > Solr 6.1.0 [15 milliseconds] > http://XX.XX.XX.XX:XXXX > /solr/forms/select?q=id:FORM1011547110139542&&fl=*ORI_FORMTITLE > > Can someone check and suggest possible root cause/changes to solve this > issue. > > Regards, > Vishal. >
