Issue:
Everything related to the translate extension is extremely slow at Meta. It begins with marking pages for translation which takes >> 10s, continues with Fuzzy-Bot errors (it "forgets" to create the /en subpage after marking for translation sometimes) and ends with failing [[:m:Special:AggregateGroups]].

I tried to create a new group (Add a new aggregate group) and then pressed "save". My input disappeared but the group was not added to the page. After reloading [[Special:AggregateGroups]] there was a new group with an empty heading on top of the page. I was unable to add pages to this groups. After reloading the page again, the group now had the correct heading and was sorted correctly but adding pages failed with:
{"servedby":"mw1132","error":{"code":"internal_api_error_DBQueryError","info":"Database query error","*":""}}

Version: wmf-deployment
Severity: normal
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=53792