GroupAnalyticTask Gets the information about groups 
JiraBasicStatsAnalyticTask This task will calculate basic counts over objects and will return its values  
JiraStartAnalyticEvent Event that will send info to the analytics system about jira configuration  
JiraSystemAnalyticTask Tracks information of the system like : DB, Java Version, variables, etc  
UserAnalyticTask Gets the information of active users / total users  
WorkflowAnalyticTask Get all the information from workflows.