Marostegui created this task. Marostegui added projects: Wikidata, Pybal, Traffic. Restricted Application added a subscriber: Aklapper. Restricted Application added a project: wdwb-tech.
TASK DESCRIPTION While deploying a schema change (T284375 <https://phabricator.wikimedia.org/T284375>) on s8 master, with replication enabled, a few of the replicas reached too many connections. The cause is the following queries piling up on codfw s8 replicas P16523 (An Untitled Masterwork) <https://phabricator.wikimedia.org/P16523> These queries seem to be queries to monitor the mw status of the hosts, requesting `Special:Blankpage` from LVS There are several things that probably need fixing here: - This query isn't cheap - We might want to rate limit this query somehow. - This makes impossible to deploy schema changes with replication on the standby DC for certain big tables. TASK DETAIL https://phabricator.wikimedia.org/T284981 EMAIL PREFERENCES https://phabricator.wikimedia.org/settings/panel/emailpreferences/ To: Marostegui Cc: Aklapper, Marostegui, Invadibot, maantietaja, Akuckartz, Nandana, Lahi, Gq86, GoranSMilovanovic, QZanden, LawExplorer, _jensen, rosalieper, Scott_WUaS, Wikidata-bugs, aude, mark, Ladsgroup, Addshore, Mbch331
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