Fix wrong inequality direction for scale up prevention

lower short-timeout threshold

Author: Sushisource

core/src/pollers/poll_buffer.rs

@@ -305,7 +305,7 @@ where
                     // Reduce poll timeout if we're frequently getting tasks, to avoid having many
                     // outstanding long polls for a full minute after a burst subsides.
                     let timeout_override =
-                        if report_handle.ingested_this_period.load(Ordering::Relaxed) > 2 {
+                        if report_handle.ingested_this_period.load(Ordering::Relaxed) > 1 {
                             Some(Duration::from_secs(11))
                         } else {
                             None
@@ -468,8 +468,10 @@ where
                     }
                     let ingested = rhc.ingested_this_period.swap(0, Ordering::Relaxed);
                     let ingested_last = rhc.ingested_last_period.swap(ingested, Ordering::Relaxed);
-                    rhc.scale_up_allowed
-                        .store(ingested_last >= ingested, Ordering::Relaxed);
+                    rhc.scale_up_allowed.store(
+                        ingested >= (ingested_last as f64 * 1.1) as usize,
+                        Ordering::Relaxed,
+                    );
                 }
             }))
         } else {

tests/manual_tests.rs

@@ -43,6 +43,7 @@ async fn poller_load_spiky() {
         .worker_config
         .max_cached_workflows(5000_usize)
         .max_outstanding_workflow_tasks(1000_usize)
+        .max_outstanding_activities(1000_usize)
         .workflow_task_poller_behavior(PollerBehavior::Autoscaling {
             minimum: 1,
             maximum: 200,