mongodb on high load (more number of connetions)

[malahov]

Hi! I'm using spring data to work with mongodb. When number connections increasing, time of query become very long (1 seconds - 13 seconds Oo). When requests go from users - mongodb is very fast (9 ms - 40 ms), but if RabbitMqListener uses mongodb, that time of query become very long. RabbitMqListener work on 10 Concurrent Consumers.

My beans:

    @Bean
    @Scope("singleton")
    public MongoDbFactory mongoDbFactory() throws Exception {
        MongoOptions options = new MongoOptions();

//        options.setConnectionsPerHost(50);
//        options.setThreadsAllowedToBlockForConnectionMultiplier(10);

        UserCredentials userCredentials = new UserCredentials(Const.mongoConfiguration.getUser(), Const.mongoConfiguration.getPwd());
        return new SimpleMongoDbFactory(new Mongo(Const.mongoConfiguration.getHost(), options), Const.mongoConfiguration.getDatabase_name(), userCredentials);
    }

    @Bean
    @Scope("singleton")
    public MongoTemplate mongoTemplate() throws Exception {

        MongoTemplate mongoTemplate = new MongoTemplate(mongoDbFactory());
        return mongoTemplate;

    }

They should be to make singleton ?

How can I fix this error?