Increase Neo4j connection pool size and timeouts

- Bump default connection pool size to 100
- Add new Neo4j timeout env variables to env.example

env.example

@@ -193,6 +193,10 @@ POSTGRES_MAX_CONNECTIONS=12
 NEO4J_URI=neo4j+s://xxxxxxxx.databases.neo4j.io
 NEO4J_USERNAME=neo4j
 NEO4J_PASSWORD='your_password'
+NEO4J_MAX_CONNECTION_POOL_SIZE=100
+NEO4J_CONNECTION_TIMEOUT=30
+NEO4J_CONNECTION_ACQUISITION_TIMEOUT=30
+MAX_TRANSACTION_RETRY_TIME=30
 # NEO4J_WORKSPACE=forced_workspace_name
 
 ### MongoDB Configuration

lightrag/kg/neo4j_impl.py

@@ -77,7 +77,7 @@ class Neo4JStorage(BaseGraphStorage):
         MAX_CONNECTION_POOL_SIZE = int(
             os.environ.get(
                 "NEO4J_MAX_CONNECTION_POOL_SIZE",
-                config.get("neo4j", "connection_pool_size", fallback=50),
+                config.get("neo4j", "connection_pool_size", fallback=100),
             )
         )
         CONNECTION_TIMEOUT = float(