When many companies or developers use US servers, they may encounter sudden freezes, slow or no response, etc. So what happened to the U.S. server? Today, JTTI Xiaobian will give you a brief introduction. Usually there are several reasons for server lag:

1. Local network failure

The failure of the local network will affect the remote connection, followed by inaccessibility or slow access. First of all, we need to rule out whether there is a problem with the local network environment. Open other websites, such as Baidu, to test whether the local network is normal.

2. The network failure between the local server and the US server

Only when the network between the local server and the US server remains unblocked can the remote connection be guaranteed to be smooth. After troubleshooting the local network, you need to run the ping command to test the network between the local and public IP addresses for delays, packet loss, etc.

3. DNS resolution

When the DNS server fails, there will also be problems such as slowdown when accessing your website locally. At this time, you need to check the DNS resolution, and use the dig/nslookup command to check whether the problem is caused by DNS resolution.

4. The configuration is too low

If the server configuration is too low, it will be difficult to carry the workload of your server in the United States. For example: the website data is too large, the application calculation load is too high, the CPU/memory usage is too high, and the bandwidth is insufficient due to the overload of user access traffic, etc., all of which may lead to the inability to cope with the load and cause the card to slow down.

5. Website program problems or server attacks

A problem with the deployed program may also cause the server to slow down, or a large-scale traffic attack such as DDoS or CC may also cause the server to slow down. Program problems, such as code conflicts, will cause the system to run abnormally, causing the server to fail to respond to your instructions. However, traffic attacks such as DDoS will cause your network bandwidth to be fully loaded or overloaded, causing network congestion, so that your or other visitors' normal access requests will be rejected. The performance is that the server cannot respond, the website cannot be accessed or the loading speed is particularly slow.

The above points are common reasons for US server freezes. In addition to the lag caused by hardware facilities (such as network cables, equipment aging, etc.), attention should be paid to configuration and usage. Doing a good job in the daily maintenance of the internal environment is an effective solution to Caton.