Doubled memory usage (11.4.4 <-> 11.4.5)

Doubled memory usage (11.4.4 <-> 11.4.5)

After updating a productive MariaDB installation to 11.4.5 my monitoring showed that the docker container for MariaDB (official image) is using twice as much memory than with the previous version (around 128MB with 11.4.4 and around 256 MB with 11.4.5).
I checked my config and "SHOW GLOBAL STATUS", but nothing seems to explain that increase in memory usage. After rolling back to 11.4.4, everything is back to normal. This happened on Ubuntu 24.04 LTS (kernel 6.8.0-54-generic).

I can even see a 30% increase with a blank database and default config on my Fedora 41 Workstation. When a client connects, in 11.4.5 the memory usage increases by 90MB (compared to 5MB in the previous version). With a client connected, you can see the 100% increase in memory usage.

I also attached two screenshots showing memory and disk metrics of my production host around the time of downgrading MariaDB 11.4.5 to 11.4.4. It seems noticeable that 11.4.5 also causes higher disk I/O.

# Check memory usage (use dedicated terminal to keep running)

docker stats

# Start containers

docker run -d --name mariadb-11.4.4 -e MARIADB_ALLOW_EMPTY_ROOT_PASSWORD=1 mariadb:11.4.4

docker run -d --name mariadb-11.4.5 -e MARIADB_ALLOW_EMPTY_ROOT_PASSWORD=1 mariadb:11.4.5

# Connect a client

docker exec -it mariadb-11.4.4 mariadb

docker exec -it mariadb-11.4.5 mariadb

# Stop containers and cleanup

docker stop mariadb-11.4.4 mariadb-11.4.5

docker rm mariadb-11.4.4 mariadb-11.4.5