Why is the response time of connecting to the database on the same network segment different?

now there are three servers, one database server, two business servers An and B, and the three servers have the same network segment, but the time for A to connect to the database is fast (less than 1 second). But B is slow to connect to the database (about 10 seconds).

the length of tracking route is similar to that of ping:

A:

clipboard.png

B:

clipboard.png

ask the gods to help find out what the problem is.

Mysql centos
Feb.25,2022

finally query to the database needs to disable DNS parsing, or write a hosts, access speed in the database server will be very fast

Previous: Webpack4 package hash remains the same, just add mode.

Next: Angular5 project deployed to ngnix reported error 404

css mysql arrays josn react html typescript webpack npm sass R objective-c .net sql-server jquery python-3.x angularjs django angular excel regex iphone ajax linux xml pandas vba spring database wordpress string wpf xcode windows bash postgresql oracle multithreading eclipse list firebase algorithm macos forms image scala visual-studio azure bootstrap spring-boot react-native python-2.7 docker performance function winforms matlab powershell apache dataframe api sqlite numpy rest shell selenium flutter dart maven loops qt swing android-studio csv express file class tensorflow sorting codeigniter perl
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1c2a9da-33a1f.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1c2a9da-33a1f.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?