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- Subscriptions use a CACHED thread pool. The Runtime subscribes for a key pattern only once, at startup. If the keyspace notifications API is used more often, the thread pool type may be changed to FIXED.
- Notifications use a FIXED thread pool with 4 threads. Each session modification request causes a guard to be written, which in turn triggers a notification on all Runtime nodes. The amount of work done for each notification is low. Depending on load, the default pool size and type may be adjusted as needed.
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