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https://issues.apache.org/jira/browse/IMPALA-7164?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16510312#comment-16510312
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Philip Zeyliger commented on IMPALA-7164:
-----------------------------------------

I think instead of a map of counters keyed by counter name, we should strive to 
put those names in the Thrift schema definition itself. That will allow 
evolution and be considerably more obvious.

> Define public API for RuntimeProfile
> ------------------------------------
>
>                 Key: IMPALA-7164
>                 URL: https://issues.apache.org/jira/browse/IMPALA-7164
>             Project: IMPALA
>          Issue Type: Improvement
>          Components: Backend
>            Reporter: Tim Armstrong
>            Priority: Major
>              Labels: resource-management, usability
>
> Currently the only public API for the runtime profile is the Thrift 
> definition. The exact layout and counters are all implementation-dependent 
> and subject to change. People are trying to build tools that consume runtime 
> profiles and process them, but that's hard since the counters can change from 
> version to version and sometimes the semantics change.
> I think we need to figure out which things are part of the public API, 
> validate that they make sense and document them clearly. We should also 
> clearly document that things outside of this public API are subject to change 
> without notice. I don't think the public API necessarily needs to be 
> "porcelain", but we should generally try to avoid unnecessary changes and 
> mention any changes in release notes etc.
> We could start simple and just collect "public" counter names in a module and 
> comment each of them.



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