DM-39516: Extend Qserv Web Dashboard to allow monitoring active queries at Czar and worker database servers #803
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Also added the utility class to handle simple query cases.
jgates108
approved these changes
Aug 16, 2023
Simplified error reporting. Reduced code duplication.
Added a function for getting info on the ongoing database activities as reported by the query SHOW [FULL] PROCESSLIST.
Added the REST services to report database activities at Czar and Qserv workers. Incremented the version number of the REST API.
The identifiers are captured for the worker task monitoring purposes. They are used by the Web Dashboard for associating task activities with the corresponding MySQL queries issued by the tasks. The task monitoring page of the Dashboard has been extended to display a value of the identifier (if it was set for the task).
Introduced an additional state STARTED to differentiate between two events - when a task was started by a scheduler from the actual start time of the corresponding MySQL query. The change is meant to improve the monitoring of the worker tasks. The corresponding monitoring page of the Web Dashboard was modified as well.
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