perf(historian): bounded-parallel per-tag drain (DrainConcurrency, default 8)

2026-08-16 04:21:18 -04:00
parent d8a17f2e34
commit a76b4e0740
4 changed files with 271 additions and 23 deletions
@@ -477,7 +477,10 @@ public static class ServiceCollectionExtensions
                            captureGate: resolver.GetService<IHistorizationRoleView>() is { } histRoleView
                                ? () => histRoleView.ShouldRecordHistorizedValues
                                : null,
-                            maxWriteAttempts: continuousOptions.MaxWriteAttempts),
+                            maxWriteAttempts: continuousOptions.MaxWriteAttempts,
+                            // Bounded-parallel per-tag drain: the groups in one pass are independent
+                            // gateway round-trips, so a sequential pass costs `tags × latency`.
+                            drainConcurrency: continuousOptions.DrainConcurrency),
                        ContinuousHistorizationRecorderActorName);
                    registry.Register<ContinuousHistorizationRecorderKey>(continuousRecorder);
                }