When the business slows down, the message "serverStatus was very slow" frequently appears in the log.
What does each item mean?
As shown in the picture, how to troubleshoot?
The message means that MongoDB is almost frozen, and probably the OS is under high load. You can check the FTDC metrics (diag data directory), or if you have any monitoring tool in-place such as PMM, you can debug what is currently going on with the server and find out the bottleneck (I/O, CPU, Disk).
In either case, without having proper monitoring in place, it is not possible to know if MongoDB is being affected or is the actual culprit. You can check more about PMM here:
Thank you very much, I will check the system load again
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