Am 24.10.2013 12:20, schrieb Daniel Schütze:
> The simple query select  count(*) from dbmail_fromfield; takes 8seconds on
> the new and 3 seconds on the old.

makes no sense to measure anything but disk speed
http://www.mysqlperformanceblog.com/2006/12/01/count-for-innodb-tables/

> A scan query of select * from dbmail_fromfield where fromfield like
> "%EXAMPLE%"; takes 9 seconds on the new and 3.3 seconds on the old.

is a query not using indexes

> Also of course these are not queries which dbmail actually performs when it
> is running for real

they are generally useless examples, see above

> and I have read dbmail 5.1 is faster for single threaded queries

what is a "single threaded query"?

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