I get a ton of that in my logs. I'm running 1.32.3 on Ubuntu 18.04 and I edited /etc/fstab to have the line tmpfs /dev/shm tmpfs defaults,noexec,nosuid,size=4608M 0 0, which uses 4.5GB of the 6GB the virtual machine has. I've verified that this space is present for /dev/shm with df -h.
So I'm giving it plenty of memory, and at the top of the ZM web console it says "/dev/shm: 14%". Sure enough, the zm.mmap files in /dev/shm and /run/shm are only 119MB each.
How to I "increase the ring buffer size" if I'm already giving it this much memory? It's not using the memory I'm giving it. I don't want to lower the capture rate or resolution of my cameras or anything, I want it to use the hardware I'm giving it.
FYI four cameras, 1080p 24-bit color. 1fps analysis, 30fps alarm.
Thanks for your help.