Утечка памяти во Flask

@app.route('/terminals/get-info', methods=['GET', 'POST'])
@profile
def get_infoTerminal():
    gc.collect()
    if request.method == 'POST':
        content = request.json
        terminal = session_db.query(Terminal).filter_by(title=content['name']).one_or_none()
        if terminal:
            if terminal.active == True: #if terminal is checked
                terminal.lastframe = content['lastframe']
                terminal.last_time = datetime.now()
                session_db.add(terminal)
                session_db.commit()
                t_dict = {
                'time_connect': 6,
                'commands' : terminal.commands
                }
            else: #all termianal
                terminal.lastframe = content['lastframe']
                terminal.last_time = datetime.now()
                session_db.add(terminal)
                session_db.commit()
                t_dict = {
                'time_connect': 60,
                'commands' : terminal.commands
                }
            return jsonify(t_dict)
        else:
            new_terminal = Terminal(title=content['name'], status='CONNECTION',lastframe='',last_time=datetime.now(), info='',time_connect = 1)
            session_db.add(new_terminal)
            session_db.commit()
            return ('TERMINAL ADD')
    return ('POST')

617   1240.7 MiB      0.3 MiB           1           terminal = session_db.query(Terminal).filter_by(title=content['name']).one_or_none()

   623   1243.6 MiB      0.3 MiB           1                   session_db.commit()

engine = create_engine('sqlite:///terminals.db?check_same_thread=False')
Base.metadata.bind = engine
 
DBSession = sessionmaker(bind=engine)
session_db = DBSession()

with DBSession.begin() as session

engine = create_engine('sqlite:///terminals.db?check_same_thread=False')
Base.metadata.bind = engine
 
DBSession = sessionmaker(bind=engine)
 
#session_db_s = scoped_session(DBSession)
 
#session_db = session_db_s()
session_db = DBSession()
 
app.config['SECRET_KEY'] = 'apple pie'
app.config.update({
    'SQLALCHEMY_POOL_SIZE': 10,
    'SQLALCHEMY_POOL_TIMEOUT': 3,
    'SQLALCHEMY_MAX_OVERFLOW' : 20,
 
})