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Status: Untriaged
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Type: Bug



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proposal: Move obsolete histograms to obsolete.xml

Project Member Reported by sadrul@chromium.org, Jul 13

Issue description

The obsolete histograms are included in histograms.xml with the non-obsolete ones. Can they be moved into a separate obsolete.xml file? It looks like there are approx. 3700+ metrics that are currently marked obsolete. So moving them out into a separate file would reduce the size of histograms.xml (and thus hopefully make the scripts that deal with this script faster).
 
Yes please!

This work should include a presubmit check that enforces that obsolete histograms can't exist in histograms.xml.
Ilya has an intern project approved for fall to actually remove the need to keep <obsolete> entries in histograms.xml. (Basically, by keeping a database of the historical data for removed histograms.)

So the problem will go away when that will be implemented. I suggest we just wait for that to happen rather than spending extra effort in the mean time on a solution that will be temporary.

(On the other hand, if someone feels strongly about it, I won't veto a patch to do this - just doesn't seem worth it given the upcoming project.)

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