Arvados

MaxConcurrentRailsRequests is currently set to 8 in the config defaults.

Because we haven't addressed the more general solution of #21287, this is small enough that loading a process page will cause timeouts, because the concurrent requests to fetch log files will fill up the request queue, preventing keep-web from being able to call back to the API server to validate the token.

The minimum concurrent requests should be doubled to at least 16.