perf(runtime): raise opcua pinned dispatcher throughput 1 -> 100

2026-08-15 12:07:05 -04:00
parent b857df8a12
commit 1320f3fa08
2 changed files with 16 additions and 3 deletions
@@ -109,8 +109,15 @@ akka {
 # Pinned dispatcher used by OpcUaPublishActor (Task 44) so the OPC UA SDK sees
 # only one thread per actor instance — its session/subscription locks expect
 # strict single-threaded access.
+#
+# throughput is NOT what provides that guarantee: the PinnedDispatcher does, by
+# giving the actor its own dedicated thread. throughput only sets how many queued
+# messages drain per scheduling run, so 100 removes a mailbox re-schedule
+# round-trip per message on the hottest actor in the process with zero change to
+# concurrency. Must stay in sync with the inline HOCON copy in
+# ServiceCollectionExtensions.WithOtOpcUaRuntimeActors.
 opcua-synchronized-dispatcher {
    type = "PinnedDispatcher"
    executor = "thread-pool-executor"
-    throughput = 1
+    throughput = 100
 }