I'm pretty sure that max indexing threads is per core, but just looked and it's not supported in Solr 5.3 and above so I wouldn't worry about it at all.
I've never seen much in the way of benefit for bumping this past 128M or maybe 256M. This is just how much memory is filled up before the buffer is flushed to disk. Unless you have very high indexing loads or really long autocommit times, you'll rarely hit it anyway since this memory is also flushed when you do any flavor of hard commit. Best, Erick On Fri, Dec 4, 2015 at 4:55 PM, KNitin <nitin.t...@gmail.com> wrote: > Hi, > > The max indexing threads in the solrconfig.xml is set to 8 by default. Does > this mean only 8 concurrent indexing threads will be allowed per collection > level? or per core level? > > Buffered size : This seems to be set at 64Mb. If we have beefier machine > that can take more load, can we set this to a higher limit say 1 or 2 Gb? > What will be downside of doing so? (apart from commits taking longer). > > Thanks in advance! > Nitin