https://bugzilla.wikimedia.org/show_bug.cgi?id=34778
--- Comment #13 from Max Semenik <maxsem.w...@gmail.com> 2012-04-23 17:43:35
UTC ---
Another issue:
> $xares = $dbr->select( "revision", array('rev_id', 'rev_timestamp'),
> array("rev_page=$pg_id"), __METHOD__, array("ORDER BY"=>"rev_id DESC") );
rev_id is not guaranteed to always behave like you want it to, sort by
rev_timestamp.
(Expanding on comment #12)
> Then it's not going to be deployed on WMF, because requesting thousands of
> revisions is not an option with our scale.
Even caching isn't going to help, because we have pages with *hundreds of
thousands* revisions. Memcached object size limit is 1MB - revision information
for such pages won't even fit into it. And Special:Timemap will get tired of
serving megabytes and megabytes of data in such cases.
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