Is my usage of /dev/shm 0% because recommended frame buffer is 3-5 now?

Discussions related to the 1.36.x series of ZoneMinder
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Joined: Wed Sep 02, 2020 1:37 pm

Is my usage of /dev/shm 0% because recommended frame buffer is 3-5 now?

Post by Farm_Server »

I just switched to 1.36 on a fresh Debian 11 install and installed a hand me down 1060(replacing a very old radeon card). I notice my /dev/shm is 0% where as before it was closer to 70% of the 11GB of ram I have allocated to zoneminder. Everything seems to run ok I just am wondering what happened and if I need to address anything. Specifically it says I am using under 50Mb of ram which seems low for anything these days.

I have three 4mp cameras running 25fps and at 720p video decoding is set to 'passthrough' and hardware encoding is 'cuda'. Cuda is installed with the non free nvidia driver for use with zmeventnotification server and ML hooks.

The most obvious explanation is in the Buffers Tab, for 'Image Buffer Size' it is suggested to run 3-5 frames only, I had been running much more(wiki still says no more than 50) in my previous build. Why the change? My post and pre event buffers are set to 200 so there should be something in the buffer que during an event.

Less obvious is that I went from 1GB of VRAM to 8GB, are the camera frames being buffered in the gpu instead of /dev/shm now?

Maybe its just a reporting error? like I said it seems to run fine, much better with a real gpu thats for sure. :mrgreen:
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