1. In the pagoda, check the server load is 100%, while the cpu and memory usage are normal
Enter the top command to view the average load:
The load of viewing results is really high;
2. Then check the io usage
Use the iotop tool, install: yum install iotop (run command: iotop)
If it cannot be installed because the io load is too high,
Install pidstat: yum install sysstat (run command: pidstat -d)
3. According to the displayed results, it is found that mysql and php applications read and write frequently;
Perform performance adjustments on mysql and php in the pagoda
4. After adjustment, you may need to wait for a while for the load to recover
After recovery, you can install the iotop tool for real-time monitoring:
Check back to normal