11/16/2023 0 Comments Fs sqlpro 8773278914 ca![]() ![]() Through this method, AD FS receives each new change from SQL as soon as it occurs. It is recommended to set it to 1 hour to reduce an unnecessary data refresh by AD FS because the cache data will be refreshed if any SQL changes occur.ĪD FS registers a callback for SQL changes, and upon a change, AD FS receives a notification. The default value for the cache refresh is five minutes. Recommendations for setting the cache refresh This notification will trigger the cache to be refreshed. The cache's data will be refreshed outside of the cacheRefreshIntervalSecs value if AD FS receives a notification from SQL signifying that a change has occurred in the database. The oldest entry can also be dropped from the cache once the configurable maxRelyingPartyEntries value is reached. If an entry is not accessed for 5 * cacheRefreshIntervalSecs, it is dropped from the cache. While an entry exists in the cache, incoming requests will use the cache while the background refresh is in progress. At the cacheRefreshIntervalSecs value, the application in the cache is refreshed using the background thread. When AD FS receives a request for an application, AD FS retrieves the application from SQL and adds it to the cache. After the set value duration, AD FS begins refreshing its cache and while the update is in progress, the old cache data will continue to be used. The default value is set to 300 seconds when backgroundCacheRefreshEnabled is set to true. The frequency of fetching data from the cache can be customized to a time value by setting cacheRefreshIntervalSecs. When the backgroundCacheRefreshEnabled is set to true, AD FS will enable the background thread to run cache updates. The time spent for a database lookup is significantly reduced in the request thread, as the database cache updates are moved into the background thread. In the latest update to AD FS, a reduction in latency is targeted through the addition of a background thread to refresh the AD FS configuration cache and a setting to set the refresh time period. The call between two different datacenters resulted in latency. ![]() In prior Always on Availability (AoA) deployments, latency existed for any "Read" operation as the master node could be located in a separate datacenter. In-Memory cache update in background thread An upcoming update for AD FS 2019 will include these improvements. ![]() In an update for AD FS 2016, we introduced the following improvements to reduce cross database latency. ![]()
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