Is anyone aware of Datomic performance issues with latest JDK 11? We’re seeing some very poor query performance after moving from JDK 8 to 11 on Datomic 0.9.5697

could be https://bugs.openjdk.java.net/browse/JDK-8219233 ?

I looked at that

@tony.kay I would recommend moving to the latest release several dependency updates (https://docs.datomic.com/on-prem/changes.html#0.9.5927) include changes to libraries that may impact jdk11 support

ok, we’ll try that.

it's highly unlikely to be that jdk issue - that primarily affects code loaded via user.clj

but fyi, Clojure 1.10.1 includes a Clojure-side mitigation for that

what's the difference between the com.datomic/ion-dev and com.datomic/ion libraries? i tend to only use the ion-dev library in my projects, and given that ion has its own release cycle i'm wondering if i missed something in the docs.

@joshkh both are required in your ion project ion-dev is used for push/deploy/etc ‘ion’ is required for Ion projects and also includes the parameter helper functions, the cast namespace, etc

also the ionize function

https://github.com/Datomic/ion-starter/blob/master/deps.edn

and https://github.com/Datomic/ion-event-example

ah, thanks marshall. i must have dropped ion when i switched to http-direct

no, that's not true. i'm still using it to fetch environment parameters. i must have crossed some mental wires when upgrading my various query groups. 🙂 thanks again