v0.34.0_2

src/balance/model.rs

@@ -70,7 +70,10 @@ impl Default for Keepalive {
         Self {
             enabled: true,
             idle_timeout_seconds: 30,
-            max_idle_per_host: 4,
+            // Retain enough reusable H1 upstream sockets under concurrent
+            // small-response traffic. The existing 1..=64 bound, idle
+            // timeout and pool recycling still limit resource retention.
+            max_idle_per_host: 64,
             tcp_keepalive_seconds: 30,
             pool_recycle_requests: 25_000,
             pool_recycle_seconds: 3_600,

src/balance/tests.rs

@@ -102,6 +102,11 @@ mod tests {
         assert!(parsed.retry.retry_connect_errors);
         assert!(parsed.retry.retry_timeouts);
         assert_eq!(parsed.retry.retry_statuses, vec![502, 503, 504]);
+        assert_eq!(parsed.keepalive.max_idle_per_host, 64);
+        let explicit: Settings = serde_json::from_value(serde_json::json!({
+            "keepalive": { "max_idle_per_host": 4 }
+        })).unwrap();
+        assert_eq!(explicit.keepalive.max_idle_per_host, 4);
         assert_eq!(parsed.keepalive.pool_recycle_requests, 25_000);
         assert_eq!(parsed.keepalive.pool_recycle_seconds, 3_600);
         assert_eq!(parsed.keepalive.http1_max_buffer_bytes, 131_072);