The real-time statistics information consists of the execution time of each task and its corresponding Job, the number of rows processed in each data flow and the time taken to process them, and the number of rows processed per second. This can help you follow the progress of the Jobs of interest during their execution and spot immediately any bottlenecks in the data processing flows.
Real time statistics are available during task execution, and only for two hours to represent real-time information. For any longer time information, you should check the execution logs. The capacity of real-time statistics is 10 records in cache to follow the current execution of a Job. If there are more executions then old executions will be replaced by the new ones. In case Talend Administration Center works in cluster mode, the real-time statistics will only be displayed in Talend Administration Center that has run the task.