Does php persistent connection need to be done using the proxy module?

RT must be a proxy module, or can it be directly implemented using php? We will discuss whether RT must be a proxy module or php can be used directly.
Nobody knows?
For discussion

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RT must be a proxy module, or php can be used directly.
Nobody knows?
For discussion

Recently I also encountered the same problem. If there is no persistent connection when the concurrency is high, creating a network connection will waste a lot of resources.
When the PHP runtime environment is Nginx + PHP-FPM, using pconnect will cause the established connection will not be released while the new connection is constantly created, the final consequence is that all available network IO is quickly consumed.
I think I can use the mysql-proxy connection pool, but there are also problems. I don't know if it is a ro-pooling script problem. A large number of 1105 errors are generated during use, it probably means errors such as backends down, and it does not work to adjust the script.
Later I studied sqlrelay. I used sqlrelay in and 06 years. I was not very impressed at the time. I needed a large number of transformation programs, but I still had transaction errors, therefore, sqlrelay is not given priority this time. However, we can see that many versions have been released since the previous use, and you can directly use them without transformation. Therefore, we plan to perform a test.
No better solutions have been found. Let's discuss it.

I don't know if I understand what you mean correctly.

The Execution Mode of PHP determines that it is not suitable for persistent connections.
I understand that you need real-time web information interaction. Sf now seems to be a request every 10 seconds.