ZoneMinder Forums

Posted: **Sat Nov 03, 2012 10:54 am**

Hello, I've installed ZM several weeks ago and from then, I am still fighting with error message

zmwatch[494].ERR [Can't get shared memory id '7a6d0001', 1: No such file or directory]

Yes, I've already tried to google it, all responses mentioned using commands

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# echo 1073741824 >/proc/sys/kernel/shmmax
# echo 1073741824 >/proc/sys/kernel/shmall

and making those changes persistent via /etc/sysctl.conf. I've already tried it without luck.

My system is running Debian GNU/Linux 6.0.5 (squeeze), kernel version 2.6.32-5-amd64.
I am using Zoneminder 1.24.2.

ipcs -l output:

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------ Shared Memory Limits --------
max number of segments = 4096
max seg size (kbytes) = 1048576
max total shared memory (kbytes) = 4294967296
min seg size (bytes) = 1

------ Semaphore Limits --------
max number of arrays = 128
max semaphores per array = 250
max semaphores system wide = 32000
max ops per semop call = 32
semaphore max value = 32767

------ Messages: Limits --------
max queues system wide = 15979
max size of message (bytes) = 8192
default max size of queue (bytes) = 16384

Please, do you have some idea, how to fix it?

Posted: **Sun Nov 04, 2012 2:06 am**

Your ERR message doesn't have to mean that you have a shared memory issue. I suggest disabling all but one monitor and adjusting the camera to output 320*240 and then adjust the settings in ZM to the same (assuming IP monitor, for capture card just adjust ZM). Back to your ERR message: it can mean simply that there is nothing stored in shared memory to retrieve which is what I'm guessing is your cause.

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