I am proposing to add JSON logging support to pt-kill to allow it the same data that is sent to the kill_log table to be sent to a central logging service by ingesting a JSON logfile that is written to by pt-kill.

The reason for this is that the existing plain text output is limited, and at a certain point there are scaling issues with using the kill_log table option.

I have created a PR that implements this, along with a more in-depth description of the problem and proposed solution:

• https://github.com/percona/percona-toolkit/pull/543

Thanks!