What is the state of the system overall?
Many problems that impact MarkLogic Server originate outside of MarkLogic Server. Consider the health of your overall environment.
Some questions to ask are:
How efficiently is CPU being used? How much CPU capacity exists at different time slices? What is the execution speed of the current read and write tasks? Can I optimize queries or choose a better time to batch load?
How efficiently is I/O being used? What amount of data is currently being read from or written to disk? Are there any I/O bottlenecks?
Is there enough free disk space for each file system?
Are there any errors or warnings appearing in the logs for the operating system, MarkLogic Server, and applications?
What is the current state of the network?
Are there any serious errors in the system log files? Your monitor tool, or an auxiliary tool such as Splunk, should monitor your system logs and report on any detected errors.