空闲连接创建相关(related to idle connection creation)

[jiangzhongqiang]

空闲连接能不能别一次性就创建出来呢，能不能加个策略呢？如果大量客户端同时启动，一次性创建很多连接空闲连接，redis会卡很久

[jiangzhongqiang]

Can idle connections be created gradually instead of all at once? Is it possible to add a strategy for this? If many clients start at the same time and create a large number of idle connections, Redis will be stuck for a long time(about 10 seconds).

[monkey92t]

Can you provide your connection pool parameters?

[aohanhongzhi]

[aohanhongzhi]

I think so .

I encountered a Redis timeout issue. After a period of time, the interface becomes unresponsive if it is not accessed. After my analysis, I found out that a Redis query took about 15 minutes and 30 seconds, which is inexplicably long. However, when I refreshed it again in a short period of time, it returned to normal. But the first Redis query still had the same issue, taking 15 minutes and 30 seconds to respond.

I now suspect that it may be related to the Redis connection pool, as the default minimum idle connections for Redis is 0. After a period of time, the connections may be lost, requiring the creation of a new connection pool. However, during this process of creating a new connection pool, the Redis query request took 15 minutes and 30 seconds to complete.

我遇到一个redis超时的问题。接口一段时间后没有访问，就会出现不响应。我分析后得知是redis查询花费了15分钟30秒左右，我不知道为啥这么离谱。但是在短时间内再次刷新又正常了。但是第一个redis连接得在15分钟30秒后才能响应。

我现在也怀疑可能与redis连接池有关系，因为默认redis的最小空闲连接为0.当一段时间后，连接没了，因此需要重新创建连接池，而我这个创建连接池的过程中，redis查询请求竟然要花费15分钟30秒。

[aohanhongzhi]

I think the problem maybe relate below article

https://mp.weixin.qq.com/s/DuxEm_rOvr5bWdqC3MN5Jw

so I try to add heartbeat in my code

	ticker := time.NewTicker(time.Duration(55) * time.Second)
	//this is to send "ping" request each second for health-check
	go func() {
		for {
			select {
			case <-ticker.C:
				//send heart-beat signal to check if everything is ok
				if _, err := client.Ping(context.TODO()).Result(); err != nil {
					log.Errorf("unable to ping redis, error: %+v", err)
				} else {
					log.Info("heartbeat ok!")
				}
			}
		}
	}()