MySql uses skip-name-resolve to solve the problem of slow external network connection client

The MySQL built on Tencent Cloud is always very slow when accessed using Navicat on the development computer. It turns out that Mysql will perform domain name resolution on the requested address. The development computer does not have a domain name, so it will be very slow. Use the following to solve it

[mysqld]
skip-name-resolve
skip-grant-tables

Official explanation

How MySQL
When a new thread connects to mysqld, mysqld will
spawn a new thread to handle the request. This thread will first check
if the hostname is in the hostname cache. If not the thread will call
gethostbyaddr_r() and gethostbyname_r() to resolve the hostname. If
The operating system doesn't support the above thread-safe calls, the
The thread will lock a mutex and call gethostbyaddr() and gethostbyname()
instead. Note that in this case no other thread can resolve other
hostnames that are not in the hostname cache until the first thread is
ready. You can disable DNS host lookup by starting mysqld with
–skip-name-resolve. In this case you can however only use IP names in
the MySQL privilege tables. If you have a very slow DNS and many
hosts, you can get more performance by either disabling DNS lookup
with –skip-name-resolve or by increasing the HOST_CACHE_SIZE define
(default: 128) and recompile mysqld. You can disable the hostname
cache with –skip-host-cache. You can clear the hostname cache with
FLUSH HOSTS or mysqladmin flush-hosts. If you don't want to allow
connections over TCP/IP, you can do this by starting mysqld with
--skip-networking.

According to the documentation, if your mysql host queries DNS very slowly or there are many client hosts, the connection will be very slow. Since our development machine cannot connect to the external network, DNS resolution is impossible to complete, which explains why the connection is so slow. At the same time, please note that after adding this configuration parameter, the host field in the MySQL authorization table cannot use the domain name but only the IP address, because this is the result of prohibiting domain name resolution.

Summarize

The above is what I introduced to you about MySql using skip-name-resolve to solve the problem of slow external network connection client. I hope it will be helpful to you. If you have any questions, please leave me a message and I will reply to you in time. I would also like to thank everyone for their support of the 123WORDPRESS.COM website!