I have a sharding question.
We have a collection (one shard, two replicas, currently running Solr6.6) which sometimes becomes unresponsive on the non-leader node. It is 214 gigabytes, and we were wondering whether there is a rule of thumb how large to allow a core to grow before sharding. I have a reference in my notes from the 2015 Solr conference in Austin "baseline no more than 100 million docs/shard" and "ideal shard-to-memory ratio, if at all possible index should fit into RAM, but other than that it gets really specific really fast"; but that was several versions ago, and so I wanted to ask whether these suggestions have been recalculated. Thanks
