OpsCenter data growing too large
A bug, which has been fixed in 3.2.1, was not setting a TTL on metrics data being collected for a managed cluster. Depending on your enviornment, this could cause some column families in the OpsCenter keyspace to grow too large. The most common offenders will be the pdps (raw data points) and rollups60 (1m data points) column families.
If any of the column families have grown too large, you can truncate them to reclaim the space. If you are not comfortable losing historical data for that granularity (for example, 1m), please contact DataStax support.