There's a nicer way to enjoy your Scheduler log file: instead of reading - you can visualise it...
Save the .iok file below and replace the sources with your own service_scheduler_task_event_log.csv, located in the Scheduler Log folder. You can monitor total number of executed actions per day, or isolate the reports that need attention, because they generate warnings/errors.
You have 2 sources in the datamanager. Both are iok files. But our logs are CSV, XML or TXT files. In our event_log.csv I have onlye one field. What have you changed on your log file before loading it into datamanager?
Both files are Service_scheduler_task_event_log.csv , taken on different days, so I appended them, followed by de-duplicate operation, to get a picture over a longer time period.