Hi Parminder. Thanks for posting this question and answer. I am wondering if there is a reason why you posted it with visibility private to TR developers (see padlock above). If this is not sensitive information I would like to change it so the entire internal & External community can see it. Do you agree? Thanks, Andy
Caching of Charts service images are based on the interval of the chart requested. Break down is
interval From 1 To 1 minute expiration is "00:00:20"
interval From 2 To 2 minute expiration is "00:00:40"
interval From 3 To 5 minute expiration is "00:01:00"
interval From 6 To 10 minute expiration is "00:02:00"
if no interval is specified then the default is 5 minutes. Settings are Charts service wide so cache timings cannot be changed/extended etc on the client side request.