2009/10/23 Teruhiko Kurosaka <k...@basistech.com>: > I'm trying to stress-test solr (nightly build of 2009-10-12) using JMeter. > I set up JMeter to post pod_other.xml, then hd.xml, then commit.xml that only > has a line "<comit/>", 100 times. > Solr instance runs on a multi-core system. > > Solr didn't complian when the number of test threads is 1, 2, 3 or 4. > > But when I increased the thnumber of test threads to 8, I saw this error > on the console: > > SEVERE: org.apache.solr.common.SolrException: Error opening new searcher. > exceeded limit of maxWarmingSearchers=2, try again later. > > > What does this mean? > > Why Solr tries to make warm up searchers when I'm posting documents, not > searching?
A commit flushes index changes to disk and opens a new index searcher. The maxWarmingSearchers limit is just a protection mechanism. > Do I need to set this maxWarmingSearchers to greater than the number of CPU > cores? No, that's unrelated. Don't commit so often. The error is also not a fatal one - the commit fails, but you won't lose data - you just won't see it until a commit succeeds in opening a new searcher. -Yonik http://www.lucidimagination.com
