> > Is there way to set-up logging to output something when segment merging >>> runs? >>> >>> I think segment merging is logged when you enable infoStream logging >> (you >> should see it commented in the solrconfig.xml) >> > no, segment merging is not logged at info level. it needs customized log > config.
INFO level is not the same as infoStream. See solrconfig, there is a commented section that talks about it, and if you uncomment it it will generate a file with low level Lucene logging. This file will include segments information, including merging. > > > >> Can be segment merges throttled? >>> >> > You can change when and how segments are merged with the merge policy, > maybe it's enough for you changing the initial settings (mergeFactor for > example)? > > I am now researching elasticsearch, it can do it, its lucene 3.6 based > I don't know if this is what you are looking for, but the TieredMergePolicy (default) allows you to set maximum number of segments to be merged at once and maximum size of segments to be created during normal merging. Other option is, as you said, create a Jira for a new merge policy. Tomás
