old_contents: """Create a connection to the database."""
  
  from sqlalchemy import create_engine
  from sqlalchemy.orm import sessionmaker, scoped_session
  from sqlalchemy.ext.declarative import declarative_base
  import os
  
  db_url = os.environ.get("DATABASE_URL", "postgresql://postgres@localhost/wallace")
  engine = create_engine(db_url, pool_size=100)
  Session = scoped_session(sessionmaker(autoflush=True, bind=engine))
  
  Base = declarative_base()
  Base.query = Session.query_property()
  
  def get_session():
      return Session
  
  def init_db(drop_all=False):
      """Initialize the database, optionally dropping existing tables."""
      if drop_all:
          Base.metadata.drop_all(bind=engine)
      Base.metadata.create_all(bind=engine)
  
      return Session
  
new_contents: """Create a connection to the database."""
  
  from sqlalchemy import create_engine
  from sqlalchemy.orm import sessionmaker, scoped_session
  from sqlalchemy.ext.declarative import declarative_base
  import os
  
  db_url = os.environ.get("DATABASE_URL", "postgresql://postgres@localhost/wallace")
  engine = create_engine(db_url, pool_size=1000)
  Session = scoped_session(sessionmaker(autoflush=True, bind=engine))
  
  Base = declarative_base()
  Base.query = Session.query_property()
  
  def get_session():
      return Session
  
  def init_db(drop_all=False):
      """Initialize the database, optionally dropping existing tables."""
      if drop_all:
          Base.metadata.drop_all(bind=engine)
      Base.metadata.create_all(bind=engine)
  
      return Session
  
subject: Upgrade pool even further