In T231222: Address icinga noise from wmflabs we discovered that the wmflabs ORES cluster has an intermittent delay in serving simple requests from the web nodes. Essentially, 0.5% of requests will take a few seconds while 99.5% of requests finish in less than 0.01 seconds.
We don't know what causes this, but we know it doesn't seem to happen on the WMFLabs staging instance. Does it happen in the Beta cluster? Does it happen in prod?