https://bugzilla.wikimedia.org/show_bug.cgi?id=73420

            Bug ID: 73420
           Summary: DB replication results are slow.  Act as if there are
                    no indexes.
           Product: Wikimedia Labs
           Version: unspecified
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: Unprioritized
         Component: tools
          Assignee: m...@uberbox.org
          Reporter: cybernet...@yahoo.com
                CC: benap...@gmail.com, t...@tim-landscheidt.de
       Web browser: ---
   Mobile Platform: ---

Lately, the DB has required several tens of seconds to supply the results of a
query that took about 2 seconds in the past.

Here's an example:
                            [1] => Array
                                (
                                    [time] => 18.95
                                    [query] => SELECT rev_timestamp,
page_title, page_namespace FROM revision_userindex JOIN page ON page_id =
rev_page WHERE (`rev_user` = '14836860') AND `rev_timestamp` > 1 ORDER BY
rev_timestamp ASC LIMIT 0,2688354;
                                    [result] => succeeded
                                )

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