We are seeing performance degradation on our SolrCloud instances after upgrading to 6.4.1.
Here are a couple of graphs. As you can see, 6.4.1 was introduced 2/10 1200: https://www.dropbox.com/s/qrc0wodain50azz/solr1.png?dl=0 https://www.dropbox.com/s/sdk30imm8jlomz2/solr2.png?dl=0 These are two very different usage scenarios: * Solr1 has constant updates and very volatile data (30 minutes TTL, 20 shards with no replicas, across 8 servers). Requests in the 99 percentile went from ~400ms to 1000-1500ms. (Hystrix cutoff at 1.5s) * Solr2 is a more traditional instance with long-lived data (updated once a day, 24 shards with 2 replicas, across 8 servers). Requests in the 99 percentile went from ~400ms to at least 1s. (Hystrix cutoff at 1s) I've been looking around, but cannot really find a reason for the performance degradation. Does any of you have an idea? Cheers, Henrik
