https://bugzilla.wikimedia.org/show_bug.cgi?id=69182

--- Comment #1 from Sean Pringle <[email protected]> ---
labsdb1001 has now been switched onto SSD and labsdb1002 is in progress. Have
also set tokudb_empty_scan=disabled [1] which is a large part of the problem.

Providing there is always a table_schema = '...' clause the queries should be
faster. If the clause is omitted the query will take forever and trash the
table cache. That would be nice to avoid.

If issuing many, stagger the timing.

[1]
http://www.mysqlperformanceblog.com/2014/07/09/tokudb-gotchas-slow-information_schema-tables/

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