The CPU, memory, I/O, and network resource usage of each node in openGauss are obtained to check whether these resources are fully used and whether any bottleneck exists.
· CPU
You can run the top command to check the CPU usage of each node in openGauss and analyze whether performance bottleneck caused by heavy CPU load exists.
· Memory
Run the top command to check the memory usage of each node in openGauss and analyze whether a performance bottleneck occurs due to high memory usage.
· I/O
You can run the iostat or pidstat command, or use openGauss heath check tools to check the I/O usage and throughput on each node in openGauss and analyze whether performance bottleneck caused by I/O exists.
· Network
You can run the sar or ifconfig command to check the network status on each node in openGauss and analyze whether performance bottlenecks caused by network faults occur.
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