Elastic APM release notes

Review the changes, fixes, and more in each version of Elastic APM.

To check for security updates, go to Security announcements for the Elastic stack.

9.0.0

Features and enhancements

Tail-based sampling: Storage layer is rewritten to use Pebble database instead of BadgerDB. The new implementation offers a substantial throughput increase while consuming significantly less memory. Disk usage is significantly lower and more stable. See APM Transaction sampling docs for benchmark details. (#15235)

Fixes

Fix overflow in validation of apm-server.agent.config.cache.expiration on 32-bit architectures. (#15216)
Change permissions of apm-server.yml in tar.gz artifacts to 0600. (#15627)