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. Has anyone seen this phenomenon before? Best regards John Nielsen
