spotted this when debugging something else
```
cassandra.restbase1004.org.apache.cassandra.metrics.ColumnFamily.local_group_wikipedia_T_parsoid_html.meta.EstimatedRowSizeHistogram.value [J@3b173bdf 1429793729
cassandra.restbase1004.org.apache.cassandra.metrics.ColumnFamily.local_group_wikipedia_T_parsoid_wikitext.data.EstimatedRowSizeHistogram.value [J@689fb078 1429793729
cassandra.restbase1004.org.apache.cassandra.metrics.ColumnFamily.local_group_wikipedia_T_parsoid_wikitext.meta.EstimatedRowSizeHistogram.value [J@3e63622f 1429793729
cassandra.restbase1004.org.apache.cassandra.metrics.ColumnFamily.local_group_wikipedia_T_title__revisions.data.EstimatedRowSizeHistogram.value [J@4b4ceb67 1429793729
cassandra.restbase1004.org.apache.cassandra.metrics.ColumnFamily.local_group_wikipedia_T_title__revisions.idx_by_ns_ever.EstimatedRowSizeHistogram.value [J@12c096aa 1429793729
```