21124: Note MaxConcurrentRequests affects all services.

Arvados-DCO-1.1-Signed-off-by: Tom Clegg <tom@curii.com>

diff --git a/lib/config/config.default.yml b/lib/config/config.default.yml
index c5a164e7906902259841aae6f39bef5a0e77db50..abffc1c0b801a1683462bd29419a5b200ce75d39 100644 (file)
--- a/lib/config/config.default.yml
+++ b/lib/config/config.default.yml
@@ -225,6 +225,12 @@ Clusters:
 
       # Maximum number of concurrent requests to process concurrently
       # in a single service process, or 0 for no limit.
+      #
+      # Note this applies to all Arvados services (controller, webdav,
+      # websockets, etc.). Concurrency in the controller service is
+      # also effectively limited by MaxConcurrentRailsRequests (see
+      # below) because most controller requests proxy through to the
+      # RailsAPI service.
       MaxConcurrentRequests: 64
 
       # Maximum number of concurrent requests to process concurrently