diff --git a/configs/sample_person_shoe_two_stage_balanced.json b/configs/sample_person_shoe_two_stage_balanced.json
index f258688..a8cc3ce 100644
--- a/configs/sample_person_shoe_two_stage_balanced.json
+++ b/configs/sample_person_shoe_two_stage_balanced.json
@@ -143,7 +143,7 @@
           "type": "publish",
           "role": "filter",
           "enable": true,
-          "cpu_affinity": [7],
+          "cpu_affinity": [3],
           "codec": "h264",
           "fps": 30,
           "bitrate_kbps": 2000,
@@ -157,10 +157,10 @@
         ["in", "pre_rgb"],
         ["pre_rgb", "person_det"],
         ["person_det", "person_trk"],
-        ["person_trk", "shoe_det"],
-        ["shoe_det", "osd"],
-        ["osd", "post"],
-        ["post", "pub"]
+        ["person_trk", "shoe_det", {"queue": {"size": 16, "strategy": "drop_oldest"}}],
+        ["shoe_det", "osd", {"queue": {"size": 16, "strategy": "drop_oldest"}}],
+        ["osd", "post", {"queue": {"size": 32, "strategy": "drop_oldest"}}],
+        ["post", "pub", {"queue": {"size": 64, "strategy": "drop_oldest"}}]
       ]
     }
   ]