Linux scientific computing, CPU usage is very low, solving, urgent!
Source: Internet
Author: User
Linux scientific computing, CPU usage is very low, solving, urgent! -- Linux general technology-Linux technology and application information. For details, refer to the following section. This is the case.
1. Linux host configuration:
Memory: 4 GB * 2
CPU: XEON dual-core x 2
In normal times, the scientific computing CPU usage is at 100%, and the memory usage is close to 7 GB. Sometimes SWAP partitions are used.
2. Considering that the memory will use SWAP to affect the computing performance, it is decided to upgrade the memory to 4G * 6 = 24G.
After the upgrade, a problem is found, and the computing performance is significantly reduced. If the CPU usage rate is less than 30%, it is decided to switch back to the original two 4G memory.
As a result, the fault persists, and the computing efficiency of the four CPUs is less than 30%.
Please refer to the following for some reason. Please give me some troubleshooting ideas. Thank you!
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