Remote service connection is very slow troubleshooting

The company's memcache, redis and mongodb are deployed on one machine, but other systems are very stuck when accessing these services, and it keeps prompting timeout. Remote tool connection, found that the computer is also very stuck.
Troubleshooting steps:
  Step 1: Check the resource usage to see if the memory is exhausted. After investigation, it is found that there are more than 200 M of memory left, which eliminates the lack of resources.
  Step 2: Check the switch and change the port, but it still doesn't work. The computer is directly connected, and the ping operation is performed. It takes about ten seconds each time, and a lot of them cannot be accessed later. After finding the company's IT department to replace the network cable, the problem still exists. .
  Finally, I thought it was a network card problem, restarted the network card, and the problem was solved.
  Later, I asked the old employee, and it was confirmed that the network card of the machine was indeed the problem.

The troubleshooting task arrangement: The operation and maintenance personnel will conduct the troubleshooting, and I will be responsible for resource coordination and docking.