20602: Add MaxQueuedRequests config.

[arvados.git] / lib / config / config.default.yml

diff --git a/lib/config/config.default.yml b/lib/config/config.default.yml
index 837ce896ea8fc78695fe21f23d543f15aa3722de..33c1e497de3fc8bbdb50b4d8cc7386eda1fa3937 100644 (file)
--- a/lib/config/config.default.yml
+++ b/lib/config/config.default.yml
@@ -227,6 +227,15 @@ Clusters:
       # in a single service process, or 0 for no limit.
       MaxConcurrentRequests: 64
 
+      # Maximum number of incoming requests to hold in a priority
+      # queue waiting for one of the MaxConcurrentRequests slots to be
+      # free. When the queue is longer than this, respond 503 to the
+      # lowest priority request.
+      #
+      # If MaxQueuedRequests is 0, respond 503 immediately to
+      # additional requests while at the MaxConcurrentRequests limit.
+      MaxQueuedRequests: 64
+
       # Fraction of MaxConcurrentRequests that can be "log create"
       # messages at any given time.  This is to prevent logging
       # updates from crowding out more important requests.