Stream: subscriptions
Topic: Performance considerations
René Spronk (Feb 18 2021 at 15:06):
Are there any performance concerns when having a server which supports lots of subscriptions (and: how to deal with those) ? Is this comparable to the support for search ? (question asked by an attendee of one of our FHIR workshops)
Josh Mandel (Feb 18 2021 at 15:17):
Absolutely! This is a major driver in the subscriptions re-design for R5 -- basically, giving servers a way to narrowly define SubscriptionTopics that they can optimize for. This is key because every resource change or data update can potentially trigger many subscriptions; in general, the best you can do is an amount of work that's linear with the number of notifications required (and naively, you could do a lot worse, by effectively running a bunch of searches every time any data changes).
Last updated: Apr 12 2022 at 19:14 UTC
