Commit does not particularly spike disk or memory usage, unless you are adding a very large number of documents between commits. A commit can cause a need to merge indexes, which can increase disk space temporarily. An optimize is *likely* to merge indexes, which will usually increase disk space temporarily.
How much disk space depends very much upon how big your index is in the first place. A 2 to 3 times factor of the sum of your peak index file size seems safe, to me. Solr uses only modest amounts of memory for the JVM for this stuff. JRJ -----Original Message----- From: Sujatha Arun [mailto:suja.a...@gmail.com] Sent: Wednesday, October 19, 2011 4:04 AM To: solr-user@lucene.apache.org Subject: Optimization /Commit memory Do we require 2 or 3 Times OS RAM memory or Hard Disk Space while performing Commit or Optimize or Both? what is the requirement in terms of size of RAM and HD for commit and Optimize Regards Sujatha
