Support for Histograms about jmx_exporter HOT 5 CLOSED

The jmx exporter can export only what is available in JMX. Cassandra doesn't export histograms, so the jmx exporter can't export them.

If you want histograms in Cassandra, that'll require changes to Cassandra.

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Maybe I'm misunderstanding, but I see quite a few mentions of histograms in the Cassandra metric docs?

I realize that the exporter can only access what is already there, but am I correct in saying it currently does not support Histograms? The docs says: "type The type of the metric, can be GAUGE or COUNTER. name must be set to use this. Defaults to GAUGE."

So assuming it is correct, I'm simply wondering if there are any plans for adding support for histograms in the near future? Or are there any obstacles to doing so? :)

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I don't think we'll support histograms in the jmx exporter for sanity's sake, however there's nothing preventing you from emulating it. A Prometheus histogram is just a set of counters.

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Feels hacky to emulate it myself as well, so we'll see how essential it really is to have. :) Thanks for the help.

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It's not that hacky for an exporter. Exporters are all about tradeoffs.

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