You can optimize during updates, but you should not optimize at all, especially if you are doing continuous updates. Hands off that knob.
wunder On Nov 26, 2012, at 4:48 PM, Shawn Heisey wrote: > For Solr 4.0 and higher, is it possible to optimize the index while other > updates are happening? Based on some behavior I just saw, I think it might > be. > > I ran a full-import using DIH -- six index shards with 13 million records > each and a seventh shard (hot shard) with 317000. On a few of those large > indexes, after DIH reported idle and successful completion, I noticed that > the index size was still increasing -- Solr was doing one last background > merge. > > In the meantime, my indexing program had noticed that the DIH was done, and > began indexing backed-up content to the new indexes. That indexing worked > flawlessly, even though the indexes were still merging. I don't think > there's any way for me to detect the "DIH done, but still merging" state ... > but I am guessing that I don't have to worry about it. > > Can anyone confirm? I know that on older Solr versions, if I tried to index > while optimizing, my program would not work right. > > Thanks, > Shawn >
