SPM 7 Lite - Schneider Electric

Report
SPM 7 – Tech Support
Training
Dashboards - How often are
they updated?
July, 2013
Dashboards - Updates
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What does Last Updated mean?
● It’s the last date/time that the gadget’s data was retrieved from the data
providers
● Each time a gadget is displayed, either during a slideshow or when a
user selects the dashboard that contains the gadget, the data on the
gadget will be displayed from the cache until the data has ‘expired’
● Data expiration occurs when the current date/time is > ‘Last Updated’
date/time + refresh interval
● Refresh interval is based on whatever ‘Viewing Period’ has been
chosen for the gadget.
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What determines the refresh interval?
● Based on gadget Viewing Period
● Stored in Time.Aggregation table in ApplicationModules db
● Viewing Period Refresh Rates:
Viewing Period
Refresh Rate
Hourly
Every 15 minutes
Daily
Every hour
Weekly
Every 6 hours
Monthly
Every 6 hours
Yearly
Every 24 hours
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More on Refresh Interval
● In the Time.Aggregation table in the ApplicationModules database –
they can be edited:
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An example
● A gadget has a viewing period of ‘Last 2 Weeks’
● This is a weekly viewing period – will be updated every six hours
● If gadget is displayed on screen at 7/11/2013 11:15 AM, the data will
not be refreshed and ‘Last Updated’ time will show 7/11/2013 5:29 AM
● If gadget remains on screen, shortly after 11:29:01 AM on 7/11/2013
● the refresh indicator will display on bottom left of gadget
● Request will be made to the data providers
● When data is returned, gadget will be updated with new data
● Last Updated time will be changed to the date/time that the data was
received from the provider.
● If gadget is displayed on screen at 7/11/2013 11:45 AM
● cached data will be displayed so user has something to look at.
● Since 24 hours have passed, refresh indicator will be displayed and a
request will be made to the data providers for new data
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Additional Information
● Gadget data will not get updated again unless the gadget is displayed
on screen’
● If the dashboard containing our example gadget is not viewed for a
month
● When it is finally viewed, the ‘Last Updated’ date will be ‘7/10/2013 11:20
AM’ with the associated data from that date/time
● Seconds later the refreshed data will be returned by the data providers
● Refresh rate of gadget data is not tied to the logging interval
● If new logged values have been recorded since the last gadget update,
they will be included when the data is refreshed
● Logging rate does not affect how often gadgets are updated
● Data expiration was implemented to avoid overwhelming data providers
with too many requests for data.
● Given this implementation, the gadgets on a dashboard will have
different refresh intervals
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Scaling
● Scaling is done automatically by the graphing tool based on the
min/max values of plotted data.
● It could change as new data comes in
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