Roan Kattouw wrote: > On Mon, Sep 26, 2011 at 4:59 PM, Ariel T. Glenn<ar...@wikimedia.org> wrote: >> Στις 26-09-2011, ημέρα Δευ, και ώρα 08:47 +0200, ο/η melvin_mm έγραψε: >>>> mysql> select max(rev_id) from revision; >>>> +-------------+ >>>> | max(rev_id) | >>>> +-------------+ >>>> | 452476647 | >>>> +-------------+ >>>> 1 row in set (0.00 sec) >>>> > As you say, there are gaps in the rev_id sequence due to undeleted > revisions and possibly the occasional transaction-rollback-induced > gap. The real real number would be SELECT COUNT(*) FROM revision; but > that'll probably take like half an hour to count all rows. > > Roan Kattouw (Catrope)
Wouldn't it be able to use the index in rev_id to return it in O(1) ? It takes ages in the toolserver view, but I guess it would be the 428660376 rows it shows in the explain. _______________________________________________ Wikitech-l mailing list Wikitech-l@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikitech-l
