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PI AF server CurrentLag

Question asked by LingYang on Mar 8, 2020
Latest reply on Mar 16, 2020 by LingYang

Can some experts help explain the meanging of CurrentLag (see attached screenshot) in Eveluation Statistics in PSE? I know the duration is the total time after PI AF Analysis service restarted. However, I have spotted that the CurrentLag was about 1 minute during the first 8 hours then it increased as the time elapsed, then it reaches 37 hours while the duration is 45 hours. Not sure what caused the latency of calculations after 8 hours 


Should it be the less the better?

What is the typical value of CurrentLag on an AF server?

What is the best way to troubleshoot the AF Server performance issue?

Could the PI Archvie server or network connection impact the perfromance of AF server?


Thanks very much in advance!