diff --git a/api/app.py b/api/app.py
index 3a5255e..ab3f9cb 100644
--- a/api/app.py
+++ b/api/app.py
@@ -177,6 +177,15 @@ app.add_middleware(
 @app.on_event("startup")
 async def startup_event():
     """Initialize service on startup."""
+    # Configure thread pool size for uvicorn (default is 40, set to 48)
+    try:
+        import anyio.to_thread
+        limiter = anyio.to_thread.current_default_thread_limiter()
+        limiter.total_tokens = 48
+        logger.info(f"Thread pool size set to {limiter.total_tokens}")
+    except Exception as e:
+        logger.warning(f"Failed to set thread pool size: {e}, using default")
+    
     es_host = os.getenv("ES_HOST", "http://localhost:9200")
     logger.info("Starting E-Commerce Search API (Multi-Tenant)")
     logger.info(f"Elasticsearch Host: {es_host}")
diff --git a/api/indexer_app.py b/api/indexer_app.py
index 2de6c51..914ae39 100644
--- a/api/indexer_app.py
+++ b/api/indexer_app.py
@@ -150,6 +150,15 @@ app = FastAPI(
 
 @app.on_event("startup")
 async def startup_event():
+    # Configure thread pool size for uvicorn (default is 40, set to 48)
+    try:
+        import anyio.to_thread
+        limiter = anyio.to_thread.current_default_thread_limiter()
+        limiter.total_tokens = 48
+        logger.info(f"Thread pool size set to {limiter.total_tokens}")
+    except Exception as e:
+        logger.warning(f"Failed to set thread pool size: {e}, using default")
+    
     es_host = os.getenv("ES_HOST", "http://localhost:9200")
     logger.info("Starting Indexer API service")
     logger.info(f"Elasticsearch Host: {es_host}")
--
libgit2 0.21.2