On 1/23/2015 3:52 PM, Daniel Cukier wrote: > I am running around eight solr servers (version 3.5) instances behind a > Load Balancer. All servers are identical and the LB is weighted by number > connections. The servers have around 4M documents and receive a constant > flow of queries. When the solr server starts, it works fine. But after some > time running, it starts to take longer respond to queries, and the server > I/O goes crazy to 100%. Look at the New Relic graphic: > > [image: enter image description here] > > If the servers behaves well in the beginning, I it starts to fail after > some time? Then if I restart the server, it gets back to low I/O for same > time and this repeats over and over.
The mailing list eats almost all attachments. We can't see your image. You can use http://apaste.info for images (up to 1MB) and text, or pick another hosting provider, and include the URL in your reply. Most performance problems like this are memory related. The high I/O you mentioned definitely sounds like it could be a situation where you don't have enough RAM available for OS disk cache. When the OS cannot cache the index effectively, queries will result in a large amount of real disk I/O. If there's enough memory for caching, queries will be entirely or mostly handled from RAM, which is *MUCH* faster than the disk. http://wiki.apache.org/solr/SolrPerformanceProblems Thanks, Shawn
