What you're describing should actually work.
However one thing to keep in mind is that relative date filters, user filters, and parameters will invalidate the query cache - so that could be the reason why it's not working if the dashboard in question contains any of those elements.
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Look at the first comment from the link above. Unfortunately, subscriptions won't do the job but the article does point you in the right direction.
Thanks for your help.
I actually created a call with Tableau support and they confirm subscription won't work.
I found a way to warm up the cache and I thought sharing it could benefit the community.
The idea is to use a Google Chrome add-on called "Auto Refresh". It enables you to set a refresh time for each tab.
Just open one tab per dashboard, set the refresh to 1 min.
You can ensure the dashboard are showing the latest data by setting the cache to " Balanced: cached for no longer than 10 min".
Only problem, as described by Justin, the dashboard will be cached with one set of parameters/filters.
Have to say I'm a little confused about why Support would say warming the cache via subscriptions doesn't work......it certainly works for us.
You can also see Russell demonstrate this below:
Warming with subscriptions should work with Tableau Server 9.x.
I don't think it works for Tableau 8.x though. The link provided by Gerardo is about Tableau 8.1.
It is good to be corrected, thanks! Of to make a couple of new subscriptions to my most used workbooks.
I'm running Tableau Server 9.0.3 and I couldn't make subscription work.
Can you please confirm you manage to make it work ?