Tune production concurrency for small VPS

web/services/city_api.py

@@ -987,17 +987,17 @@ async def _build_city_detail_batch_item_async(
 
 def _city_detail_batch_concurrency() -> int:
     try:
-        value = int(os.getenv("POLYWEATHER_CITY_DETAIL_BATCH_CONCURRENCY", "3") or "3")
+        value = int(os.getenv("POLYWEATHER_CITY_DETAIL_BATCH_CONCURRENCY", "2") or "2")
     except ValueError:
-        value = 3
+        value = 2
     return max(1, min(4, value))
 
 
 def _city_detail_batch_global_concurrency() -> int:
     try:
-        value = int(os.getenv("POLYWEATHER_CITY_DETAIL_BATCH_GLOBAL_CONCURRENCY", "2") or "2")
+        value = int(os.getenv("POLYWEATHER_CITY_DETAIL_BATCH_GLOBAL_CONCURRENCY", "1") or "1")
     except ValueError:
-        value = 2
+        value = 1
     return max(1, min(4, value))
 
 

web/services/scan_terminal_config.py

@@ -43,7 +43,7 @@ SCAN_TERMINAL_PREWARM_PAYLOAD_TIMEOUT_SEC = _env_int(
 )
 SCAN_TERMINAL_MAX_WORKERS = _env_int(
     "POLYWEATHER_SCAN_TERMINAL_MAX_WORKERS",
-    8,
+    2,
     min_value=1,
     max_value=12,
 )