diff --git a/cognee/infrastructure/databases/relational/sqlalchemy/SqlAlchemyAdapter.py b/cognee/infrastructure/databases/relational/sqlalchemy/SqlAlchemyAdapter.py
index 1b2b974cf..2c2b4b02d 100644
--- a/cognee/infrastructure/databases/relational/sqlalchemy/SqlAlchemyAdapter.py
+++ b/cognee/infrastructure/databases/relational/sqlalchemy/SqlAlchemyAdapter.py
@@ -12,7 +12,6 @@ from sqlalchemy import NullPool, text, select, MetaData, Table, delete, inspect
 from sqlalchemy.ext.asyncio import AsyncSession, create_async_engine, async_sessionmaker
 
 from cognee.modules.data.models.Data import Data
-from cognee.modules.sync.models.SyncOperation import SyncOperation
 from cognee.shared.logging_utils import get_logger
 from cognee.infrastructure.utils.run_sync import run_sync
 from cognee.infrastructure.databases.exceptions import EntityNotFoundError
@@ -58,7 +57,11 @@ class SQLAlchemyAdapter:
             )
         else:
             self.engine = create_async_engine(
-                connection_string, pool_size=12, max_overflow=12, poolclass=None
+                connection_string,
+                pool_size=1,  # one physical session per container
+                max_overflow=1,
+                pool_recycle=280,  # keep below RDS 300 s idle kill
+                pool_pre_ping=True,
             )
 
         self.sessionmaker = async_sessionmaker(bind=self.engine, expire_on_commit=False)