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adityajain22_141041 avatar image
adityajain22_141041 asked Erick Ramirez commented

Need help to understand below lines from cfstats output, How to interpret it and what will an alarm value for it.

Average live cells per slice (last five minutes): 1.0397244123892961

Maximum live cells per slice (last five minutes): 642

Average tombstones per slice (last five minutes): 1.0325837370994337

Maximum tombstones per slice (last five minutes): 3973

nodetool cfstats
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Erick Ramirez avatar image
Erick Ramirez answered Erick Ramirez commented

@adityajain22_141041 tombstones are deleted (or expired) data. Live cells are the opposite of that and is the live data. You wouldn't setup alarms against these statistics. For more information, see nodetool tablestats and What are tombstones. Cheers!

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vkayanala_42513 avatar image vkayanala_42513 commented ·

@Erick Ramirez Can you please elaborate little more about his?
How to determine or how can we tell those statistic values are alarming? for what values we can put a red flag on table?

Example: Maximum tombstones per slice (last five minutes): 3973 is this acceptable? if not what should be the max number it could tolerate?

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Erick Ramirez avatar image Erick Ramirez ♦♦ vkayanala_42513 commented ·

As I stated in my answer, you don't use those statistics as a basis for alarms. They're just metadata. Cheers!

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