We'd like to request a 30 minutes read-only time window for the following wikis to performance maintenance on their primary database master:

s7:

arwiki
cawiki
eswiki
fawiki
frwiktionary
hewiki
huwiki
kowiki
metawiki
rowiki
ukwiki
viwiki

s7 also includes centralauth database, which means some operations might fail during the read-only period, such as: GlobalRenames, Changing/Confirming emails, logging into new wikis, password changes...

Impact: Those wikis will go read-only for around 30 minutes (hopefully a lot less). Reads will not be impacted
When: Tue 23rd March at 06:00 AM UTC