When the Hong Kong cloud host prompts that there is insufficient memory, you can take some of the following steps to solve the problem:

　　Check system resource usage:

　　First, use system commands or management tools to check the current system resource usage, especially memory usage. With these commands, you can view the current memory usage and which processes are taking up more memory.

　　Optimize processes and applications:

　　If you find that certain processes or applications are taking up too much memory, you can consider optimizing these processes or applications, such as closing unnecessary background processes, optimizing code or configuration, to reduce memory usage.

　　Increase physical memory:

　　If the physical memory of your cloud host is indeed insufficient, you can consider upgrading the memory to a larger capacity. Contact your cloud service provider to learn how to upgrade memory or change cloud host configuration.

　　Using virtual memory (Swap):

　　In some cases, you can use virtual memory (Swap) to expand the system's available memory. This is a method of using disk space as temporary memory, but be aware that virtual memory usage may impact performance.

　　Optimize the application:

　　If you are experiencing out-of-memory issues when running a specific application, consider optimizing that application's memory usage, such as adjusting its configuration files or parameters.

　　Troubleshooting memory leaks:

　　A memory leak means that the memory allocated by the application is not released correctly, causing the memory to be gradually exhausted. If you suspect a memory leak, you can use tools to monitor and analyze memory usage to identify the root cause of the problem.

　　Limit concurrent connections:

　　If your application involves a large number of concurrent connections, consider limiting the number of concurrent connections to reduce memory pressure.

　　Use lightweight technology:

　　If your application can use lightweight frameworks, libraries, or technologies, consider using them to reduce memory consumption.

　　Regular monitoring and optimization:

　　Continuously monitor the system's memory usage and optimize as needed. Use system monitoring tools to regularly check your server's resource usage and whether further adjustments and optimizations are needed.