Hello, Erick Erickson: Thank you for answering my questions.
Deleted docs in Solr 8.3.0 has not reached to 30% of the entire index, so I will monitor it for now. Again thank you for your response. Actually, the articles below helped me a lot. https://lucidworks.com/post/segment-merging-deleted-documents-optimize-may-bad/ https://lucidworks.com/post/solr-and-optimizing-your-index-take-ii/ Sincerely, Kaya Ota 2020年4月16日(木) 2:41 Erick Erickson <erickerick...@gmail.com>: > The number of deleted documents will bounce around. > The default TieredMergePolicy has a rather complex > algorithm that decides which segments to > merge, and the percentage of deleted docs in any > given segment is a factor, but not the sole determinant. > > Merging is not really based on the raw number of segments, > rather on the number of segments of similar size. > > But the short answer is “no, you don’t have to configure > anything explicitly”. The percentage of deleted docs > should max out at around 30% or so, although that’s a > soft number, it’s usually lower. > > Unless you have some provable performance problem, > I wouldn’t worry about it. And don’t infer anything > until you’ve indexed a _lot_ of docs. > > Oh, and I kind of dislike numDocs as the trigger and > tend to use time on the theory that it’s easier to explain, > whereas when commits happen when using maxDocs > varies depending on the throughput rate. > > Best, > Erick > > > On Apr 15, 2020, at 1:28 PM, Kayak28 <kaya.ota....@gmail.com> wrote: > > > > Hello, Solr Community: > > > > I would like to ask about Default's Merge Policy for Solr 8.3.0. > > My client (SolrJ) makes a commit every 10'000 doc. > > I have not explicitly configured Merge Policy via solrconfig.xml > > For each indexing time, some documents are updated or deleted. > > I think the Default Merge Policy will merge segments automatically > > if there are too many segments. > > But, the number of deleted documents is increasing. > > > > Is there a Default Merge Policy Configuration? > > Or, do I have to configure it? > > > > Sincerely, > > Kaya Ota > > > > > > > > -- > > > > Sincerely, > > Kaya > > github: https://github.com/28kayak > > -- Sincerely, Kaya github: https://github.com/28kayak
