Editing the template adds 1? Job to the queue that then updates everything.
If needed you can run/schedule runjobs.php in the maintenance folder. I
know smaller wikis sometimes have issues with the jobs not getting executed
fast enough
On Sunday, May 24, 2015, Huji Lee <huji.huji(a)gmail.com> wrote:
Great answers.
Here is a follow up question though: I edited a template used in thousands
of pages, yet the Job Queue for that wiki did NOT increase by a factor of
thousand. It simply increased from around 10 to around 30. And since then
(several days ago), the associated page links are not updated. I understand
that Job Queue is not easy to comprehend, but can you shed a light as to
why the job queue only grow that much, and why the links haven't been
updated since? (Note that job queue very quickly shrank to 10 or so again).
On Sun, May 24, 2015 at 8:47 AM, John <phoenixoverride(a)gmail.com
<javascript:;>> wrote:
When editing a template the resulting link
updates go thru the Job Queue
https://www.mediawiki.org/wiki/Manual:Job_queue which has a lot of
variables which determine the speed that jobs get executed.
When you perform a null edit the page is reparsed, resulting in updates
to
the link related tables (iwlink, external_links,
page_links ect) which is
what the whatlinks here results. Normally the job queue forces a reparse
as
needed.
a standard purge does not update the table, however a forcelinkupdate
added
to the purge URL will achieve the same thing see
https://www.mediawiki.org/wiki/Manual:Parameters_to_index.php#Actions
As for job queue numbers, dont try and understand it, its a confusing
mess.
A single job might affect many pages, might or
might not spawn more jobs
and several other variable actions
On Sun, May 24, 2015 at 8:35 AM, Huji Lee <huji.huji(a)gmail.com
<javascript:;>> wrote:
> I have a number of related questions regarding MediaWiki's caching
> mechanism. I would be grateful if one could answer these please. The
> assumption here is that a wiki is configured using the exact same
caching
methods
that Wikimedia uses.
Please feel free to provide links to
https://www.mediawiki.org as well
as
https://noc.wikimedia.org when specifying
configuration variables in
your
> answers as I am sure this would benefit future readers of this thread
as
> well.
>
> Q1: Page [[foo]] contains template {{bar}}. I edit that template, but
the
> page is not immediately updated. If I
don't manually purge the cache of
> that page, how long would it take for the page cache to be updated?
Which
> variable sets that time? And what is the
value of that variable
currently
> at Wikimedia wikis?
>
> Q2: Page [[foo]] contains template {{bar}}, and that template provides
a
> link to page [[norf]]. I edit the template
such that it instead links
to
page
[[qux]]. However, when I go to Special:WhatLinksHere/norf I still
see
> [[foo]] listed. Even if I try ?action=purge on [[foo]], that behavior
> doesn't change. The only way to change it is either to edit [[foo]] and
> change its content, or to simply go to the edit page of [[foo]] and
save
> without changes.
>
> Q2.A: If I don't do that null edit, how long would it take for the page
> cache to be updated? Which variable sets that time? And what is the
value
> of that variable currently at Wikimedia
wikis?
>
> Q2.B: Why is it that ?action=purge doesn't update the pagelinks table?
>
> Q2.C: Why is it that saving a page without any edits triggers any
update
> mechanism? (I would assume it'd be less
costly overall to say "if diff
is
> null, don't do anything at all";
this question is more philosophical:
why
> would we not like the quoted behavior?
>
> Q2.D: Does the Special:WhatLinksHere results come from a cache? In
other
> words, if I query the database directly
right after I change the
template
> (as mentioned in Q2) but before I do any
null edits, would it still
show
> the old page link from [[foo]] to [[norf]]?
Or would it show the
correct
> link from [[foo]] to [[qux]] while
Special:WhatLinksHere is still
showing
the old
link?
Q2.E: Is it possible to induce the same "resolution" through API? That
is,
is it possible to try to save a page without any
changes to its content
via
> API, and thereby forcefully update the page links entries for that
page?
Q3: Assume that 100 pages contain template {{bar}}, and that template
provides a link to page [[norf]]. I edit the template such that it
instead
> links to page [[qux]]. Would that add any jobs to the job queue? If
yes,
how many?
Should I expect 100 new jobs to be added, because 100 page
cache's need updating?
Thanks in advance,
Huji
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