https://bugs.kde.org/show_bug.cgi?id=438253

Maik Qualmann <[email protected]> changed:

           What    |Removed                     |Added
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             Status|REPORTED                    |CONFIRMED
     Ever confirmed|0                           |1

--- Comment #2 from Maik Qualmann <[email protected]> ---
The delete tags trigger is really extremely slow here with my test tags table
with almost 40,000 entries. Even under MySQL Command I cannot delete 1000 tags,
I canceled it. I can optimize the trigger, now deleting 10,000 tags takes about
20 minutes. Not really nice either, but at least a lot better. But you also
have to consider that deleting such a large number of tags rarely or never
occurs with users.

Our old method of managing a TagsTree was also extremely slow, as the entire
Tags Table columns "lft" and "rgt" always had to be recalculated.

It's amazing to me that MySQL is so slow here. 

Maik

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