The erwin85 tools were temporarily disabled, apparently they were causing replag. The problematic query was
. Apparently a tool that allows to query about many usernames and IP addresses at once.Description
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I guess the tool is https://tools.wmflabs.org/erwin85/contribs.php , currently marked red because we aren't even sure it works.
I've added a check to error out above 100 users and linked herding sheep as alternative. Hopefully this is enough.