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From Aishwarya Venkataraman <cyberai...@gmail.com>
Subject Interpreting the output of cfhistograms
Date Mon, 25 Jul 2011 20:24:22 GMT
Hello,

I need help understanding the output of cfhistograms option provided as part
of nodetool.
When I run cfhistograms on one node of a 3 node cluster, I get the following
:

    Offset SSTables Write Latency Read Latency Row Size Column Count  1 0 0
458457 0 0  2 0 0 3711340 0 0  3 0 0 12159992 0 0  4 0 0 14350840 0 0  5 0 0
7866204 0 0  6 0 0 3427977 0 0  7 0 0 2407296 0 0  8 0 0 2516075 0 0  10 0 0
5392567 0 0  12 0 0 4239979 0 0  14 0 0 2415529 0 0  17 0 0 1406153 0 0  20
4291637 0 380625 0 0  24 28680590 0 191431 0 0  29 3876198 0 141841 0 0  35
0 0 57855 0 0  42 0 0 15403 0 0  50 0 0 4291 0 0  60 0 0 2118 0 0  72 0 0
1096 0 0  86 0 0 662 0 0  179 0 0 115 173 173  215 0 0 70 35 35  258 0 0 48
0 0  310 0 0 41 404 404  372 0 0 37 0 0  446 0 0 22 975 975  770 0 0 12 3668
3668  924 0 0 4 10142 10142  1331 0 0 4 256983543 256983543
What do these numbers mean ? How can I interpret the above data ? I found
some explanation here
http://narendrasharma.blogspot.com/2011/04/cassandra-07x-understanding-output-of.html,
but I did no understand this completely.

Thanks,
Aishwarya

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