[Question] How to avoid duplicate queries when one is running

[hushaoqing]

In my case, I want to avoid duplicate queries when one is running.
Such as, when user open a dashboard:

1. A long query(3mins) for a chart is running
2. Another one trigger a same query when 1) is still running
3. result: there will be two same queries sent to database.

How to avoid duplicate queries in this case? Thanks.

[villebro]

This is a known limitation in the current architecture. However, this should be resolved once Global Async Queries become generally available: #9190 . If you feel like testing the feature, feel free to enable the GLOBAL_ASYNC_QUERIES feature flag. See the CONTRIBUTING.md documentation for details: https://github.com/apache/superset/blob/master/CONTRIBUTING.md#async-chart-queries