partition sizes reported by nodetool tablehistograms

[John Sanda <jo...@gmail.com>]

I am working on some issues involving really big partitions. I have been
making extensive use of nodetool tablehistograms. What exactly is the
partition size being reported? I have a table for which the max value
reported is about 3.5 GB, but running du -h against the table data
directory reports 548 MB. Are the partition sizes reported by
tablehistograms the decompressed size on disk?

- John

Re: partition sizes reported by nodetool tablehistograms

[Chris Lohfink <cl...@gmail.com>]

Its the decompressed size of the partitions. Each sstable has stats
component that contains histograms for the size and number of columns in
the partitions (among other things, can see with sstablemetadata tool),
tablehistograms merges it for each sstable and gives the results.

Chris

On Fri, Feb 24, 2017 at 4:53 PM, John Sanda <jo...@gmail.com> wrote:

> I am working on some issues involving really big partitions. I have been
> making extensive use of nodetool tablehistograms. What exactly is the
> partition size being reported? I have a table for which the max value
> reported is about 3.5 GB, but running du -h against the table data
> directory reports 548 MB. Are the partition sizes reported by
> tablehistograms the decompressed size on disk?
>
> - John
>