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Gianluca Borello commented on CASSANDRA-8028: --------------------------------------------- How "large" partitions are we talking about here? The worrisome thing is that the command fails on a column family, and then, a few seconds later, it works, again on that same column family: First attempt: $ nodetool cfhistograms draios protobuf1 nodetool: Unable to compute when histogram overflowed See 'nodetool help' or 'nodetool help <command>'. Second attempt (after about 30 seconds): $ nodetool cfhistograms draios protobuf1 draios/protobuf1 histograms Percentile SSTables Write Latency Read Latency Partition Size Cell Count (micros) (micros) (bytes) 50% 0.00 18.60 159.55 1955666 1597 75% 1.00 21.77 364.55 4055269 3973 95% 1.00 33.11 10789.18 7007506 61214 98% 3.00 53.04 56822.90 8409007 61214 99% 4.00 155.01 77205.61 8409007 61214 Min 0.00 7.11 58.23 105779 87 Max 5.00 85449.58 189451.45 17436917 61214 There were no deletions in between, and the partitions don't seem that big to me, we try to keep them always under a few MBs. > Unable to compute when histogram overflowed > ------------------------------------------- > > Key: CASSANDRA-8028 > URL: https://issues.apache.org/jira/browse/CASSANDRA-8028 > Project: Cassandra > Issue Type: Bug > Components: Tools > Environment: Linux > Reporter: Gianluca Borello > Assignee: Carl Yeksigian > Fix For: 2.1.1 > > Attachments: 8028-2.1.txt > > > It seems like with 2.1.0 histograms can't be computed most of the times: > $ nodetool cfhistograms draios top_files_by_agent1 > nodetool: Unable to compute when histogram overflowed > See 'nodetool help' or 'nodetool help <command>'. > I can probably find a way to attach a .cql script to reproduce it, but I > suspect it must be obvious to replicate it as it happens on more than 50% of > my column families. -- This message was sent by Atlassian JIRA (v6.3.4#6332)