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From Chris Lohfink <>
Subject Re: query tracing
Date Fri, 07 Nov 2014 17:40:27 GMT
It saves a lot of information for each request thats traced so there is
significant overhead.  If you start at a low probability and move it up
based on the load impact it will provide a lot of insight and you can
control the cost.

Chris Lohfink

On Fri, Nov 7, 2014 at 11:35 AM, Jimmy Lin <> wrote:

> is there any significant  performance penalty if one turn on Cassandra
> query tracing, through DataStax java driver (say, per every query request
> of some trouble query)?
> More sampling seems better but then doing so may also slow down the system
> in some other ways?
> thanks

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