Strange indeed. What about query load/ayes during that time? What about GC? And does cache hit rate drop?
Otis -- SOLR Performance Monitoring - http://sematext.com/spm On Nov 23, 2012 2:45 AM, "John Nielsen" <j...@mcb.dk> wrote: > Hi all, > > We are seeing a strange CPU spike on one of our solr4 servers which we are > unable to explain. The spike, which only lasts for a couple of minutes, > sends the disks racing. This happens a few times a times a day. This is > what the load looks like: > > 2012.Nov.14 13:37:17 2.77 > 2012.Nov.14 13:36:17 3.65 > 2012.Nov.14 13:35:18 3.92 > 2012.Nov.14 13:34:17 3.95 > 2012.Nov.14 13:33:18 6.56 > 2012.Nov.14 13:32:17 10.79 > 2012.Nov.14 13:31:17 24.38 > 2012.Nov.14 13:30:17 63.35 > 2012.Nov.14 13:29:17 24.68 > 2012.Nov.14 13:28:17 2.44 > 2012.Nov.14 13:27:18 3.51 > 2012.Nov.14 13:26:17 5.26 > 2012.Nov.14 13:25:18 5.71 > 2012.Nov.14 13:24:17 2.7 > > The problem is that out of a 3 minute spike, I get about 40 seconds of > silence in the logs. This log usually adds like a thousand lines every > second. Not being able to communicate with the server for this long, breaks > our use case. > > We have two servers, varnish01 and varnish02. We used to feed data to > varnish02, replicate it to varnish01 where the data is then read from. When > we discovered this issue, we moved all traffic to varnish02 so that data is > being replicated to varnish01, but other than that, gets zero traffic. The > spike did not disappear. > > The spike we are seeing is on varnish01 only. > > Please note that our use case requires us to continuously feed large > amounts of data from our main system in the order of up to 1.000 registers > every minute. Our solrconfig.xml is attached. > > Has anyone seen this phenomenon before? > > Med venlig hilsen / Best regards > > *John Nielsen* > Programmer > > > > *MCB A/S* > Enghaven 15 > DK-7500 Holstebro > > Kundeservice: +45 9610 2824 > p...@mcb.dk > www.mcb.dk > >
