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Change {{REVISIONID}} from number to "-" in wgMiserMode
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Description

See T137900 for the background behind this change and the migration guide for on-wiki editors.

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Related Gerrit Patches:

Event Timeline

Krinkle created this task.Oct 20 2019, 2:12 AM
Restricted Application added subscribers: Liuxinyu970226, Aklapper. · View Herald TranscriptOct 20 2019, 2:12 AM

Change 294774 merged by jenkins-bot:
[mediawiki/core@master] Disable expensive {{REVISIONID}} magic word in miser mode
https://gerrit.wikimedia.org/r/294774

Change 527125 had a related patch set uploaded (by Krinkle; owner: Aaron Schulz):
[mediawiki/core@master] parser: further restrict "revisionid" by namespace in $wgMiserMode

https://gerrit.wikimedia.org/r/527125

Krinkle moved this task from Inbox to Radar on the Performance-Team board.Oct 20 2019, 2:13 AM
Krinkle edited projects, added Performance-Team (Radar); removed Performance-Team.
Krinkle moved this task from Limbo to Perf recommendation on the Performance-Team (Radar) board.

After investigating some weird #expr error with {{REVISIONID}} that I couldn't reproduce in my sandbox, I eventually found out about this change and updated mw:Help:Magic words and mw:Manual:$wgMiserMode to the best of my understanding.

It would have been nice if this change had been announced on Tech News, especially because of the namespace-dependent behaviour.

Thanks @Bdijkstra, changes like these should indeed be announced. I'm sorry we didn't reach you. The change was announced in Tech News (2019, week 15) (see also T137900#5087023)

I'm tagging User-notice here as well as reminder for Parsing Team to include an item in Tech News for the next phase as well.

Johan added a subscriber: Johan.Sun, Nov 24, 3:57 AM

But that would be later?

My apologies, indeed it was mentioned in TN and that issue was posted on a page that I follow. I just didn't look far enough into the past. Still, I think it should have been documented on the mentioned manual pages and also in the release notes.

Johan added a comment.Wed, Nov 27, 4:48 PM

@Krinkle I've been reading mw:Manual:$wgMiserMode but to make sure I don't misunderstand anything: compared to the original announcement, is there anything that should be added except "in wgMiserMode"?

@Johan Aye, that's a red-herring. The previous change we rolled out was already conditional on wgMiserMode. The "Miser mode" of MediaWiki is basically a "Big farm" mode. It is enabled on all WMF wikis.

In April 2019 this change was applied to pages in "content namespaces".

The upcoming change here will apply the change to the File and Category namespaces. (date still TBD, will let Parsing Team answer that.)

After that, a final change (likely, but not yet certain) will be to apply it to all namespaces (still only for WMF wikis / Miser mode - not MW default install configuration).

Johan added a comment.Thu, Nov 28, 8:01 PM

Noted. A good example of why I always ask. (: I'll add it to the newsletter going out on Monday as on early heads-up.

ssastry added a subscriber: ssastry.Fri, Dec 6, 7:23 PM

@Krinkle, is there anything more for us (parsing-team) to be aware of here beyond the fact that it is just rolling out to other namespaces? I am happy for you to roll this out whenever you are ready for it. But looks like the train is stalled now anyway and we are soon coming up to the holiday break. Does early Jan look like a good time for this? Or do you want to fold in to the next deploy?