Normal merges expunge deletes. You do not need to force a merge. Once per hour is almost certainly way too often.
Before I used Solr, I worked was on the Ultraseek team for nine years. Ultraseek had the same merging strategy, with a force merge option. I've worked with many, many customers on this issue. wunder On Nov 26, 2012, at 5:05 PM, Shawn Heisey wrote: > On 11/26/2012 5:56 PM, Walter Underwood wrote: >> You can optimize during updates, but you should not optimize at all, >> especially if you are doing continuous updates. Hands off that knob. > > I promise I'm not optimizing just because it's got a cool name, or because a > README/HOWTO said to do it. I optimize my tiny index once an hour, and the > large indexes once every six days (one of them gets optimized every day, > using DAY_OF_YEAR % 6). > > The only reason I do the optimizes is to expunge deletes. The indexer program > does inserts, reinserts, and deletes once a minute, most of which hit the > tiny index. On the large indexes, between 25000 and 500000 documents get > deleted over the course of the six day optimize interval. > > Thanks, > Shawn
