This is a classic example for using materialized views that will contain the latest values. Use materialized views(MV) for getting the latest valuesĪ typical scenario for page refresh is when you get snapshots with the status of queues and you always want to show the latest results using the arg_max summary operator. This way at least partial results for the query can come from cache instead of scanning the data. You have to determine what is the acceptable latency and set the max age for the cache accordingly.įor example, if the accepted latency is 25 seconds, you could set the max age to 15 seconds and refresh every 10 seconds.Įven if the setting is for a very short max age like 5 seconds, this setting will also set the shard level caching. The main decision you’ll have to make is how long to keep the results cache. There are a few things you can do to lower the cost of the queries. This number of queries can overwhelm the Kusto cluster and impact performance of other activities. When using page refresh, PBI will send a very high number of queries. How to improve the performance of frequent refreshes In order to distinguish between te different visuals use headers for each. In this case the last visual takes 1.5 seconds to refresh, so the lowest refresh visual would be 2 seconds. It’s a good idea to use performance analyzer and see how much time it takes to refresh the slowest visual on the page. You can refresh as frequent as 1 second but once you publish the report, you will be limited to the minimum frequency set by the tenant admin.Īlso 1 second refresh is not realistic because most pages will take more than a second to refresh. When you turn Page refresh on, you’ll see the different settings. In PBI, you can see the page refresh options from the format page area: In this article I’ll cover a few best practices to ensure that such an implementation will be successful and conserve on resources. Lately I encountered a few cases in which Page refresh in PBI was used on a dataset using Direct Query against Kusto/ADX/RTA. Real time and near real time are subjective terms.įor some businesses, real time is up to 1 ms latency and for other cases 10 minutes latency is considered close to real time.
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