Tune handling of low memory

If there is less than 10% of free heap memory available during publication of item then Tigase pubsub component will trigger Garbage Collection and it there is still very little amount of free memory will slow down delivery of notifications for published items (waiting about 1 second before continuing).

If you have assigned a lot of memory to Tigase XMPP Server or in your case this delay is not acceptable you can adjust it by pubsub component properties:

  • setting pubsub-high-memory-usage-level to percentage of heap memory accepted as near OOM state
  • setting pubsub-low-memory-delay to number of milliseconds to wait to throttle delivery of notifications
pubsub () {
    pubsub-high-memory-usage-level = 95
    pubsub-low-memory-delay = 100