| Marostegui added a comment. |
In T202764#4590949, @Smalyshev wrote:I am a bit confused by now - is the original problem because recentchanges is using a wrong host, or it's using right host and the indexes there are wrong, or something else? And how can it be fixed? WDQS poller depends on RC API, and having it take 30+ seconds instead of usual sub-second response time is a serious issue.
The problem is with the API hosts in codfw. They have an index that the eqiad slaves do not have, and looks like they are messing up with the optimizer and getting the query to run for long.
We are going to start getting rid of it, to leave eqiad and codfw with the same schema.
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