Due to unexpected circumstances, I ended up deploying a new version of cassandra-metrics-collector prior to filtering out the new metrics it introduced. Sorry about that.
For all nodes that have been upgraded to Cassandra 2.2.6, we'll need to cleanup the o.a.c.metrics.Keyspace.* Graphite metrics. At the time of this writing that should be:
no problem, I see some metrics are still being updated though, e.g.
3436550197 304 -rw-r--r-- 1 _graphite _graphite 309088 Jun 14 11:25 /var/lib/carbon/whisper/cassandra/restbase1007-a/org/apache/cassandra/metrics/Keyspace/local_group_wikiquote_T_parsoid_stash_html/AllMemtablesLiveDataSize/value.wsp
though it doesn't seem a big problem now in terms of disk space, ~10G or so in total for restbase1007 metrics
Mentioned in SAL [2016-06-14T15:54:38Z] <urandom> Restarting cassandra-metrics-collector on restbase1007 : T137304
Ok, that is unexpected. The filter.yaml on 1007 looks like this:
I'd expect that second-to-last entry to take care of this; It looks right to me.
I restarted cmc on 1007 just in case that didn't happen after the filter update. Let me know if they're stilling being updated.
indeed those metrics have stopped updating now, I've removed Keyspace and Client now
$ du -hcs */org/apache/cassandra/metrics/{Keyspace,Client} 3.3G restbase1007-a/org/apache/cassandra/metrics/Keyspace 3.3G restbase1007-b/org/apache/cassandra/metrics/Keyspace 3.3G restbase1007-c/org/apache/cassandra/metrics/Keyspace 304K restbase1007-a/org/apache/cassandra/metrics/Client 304K restbase1007-b/org/apache/cassandra/metrics/Client 304K restbase1007-c/org/apache/cassandra/metrics/Client 9.8G total