ZoneMinder 1.30.4 on Raspberry pi, 1G?

[joseph85750]

I have a Raspberry Pi 3, with the following hardware:

$ cat /proc/cpuinfo
processor : 0
model name : ARMv7 Processor rev 4 (v7l)
BogoMIPS : 76.80
Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part : 0xd03
CPU revision : 4

processor : 1
model name : ARMv7 Processor rev 4 (v7l)
BogoMIPS : 76.80
Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part : 0xd03
CPU revision : 4

processor : 2
model name : ARMv7 Processor rev 4 (v7l)
BogoMIPS : 76.80
Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part : 0xd03
CPU revision : 4

processor : 3
model name : ARMv7 Processor rev 4 (v7l)
BogoMIPS : 76.80
Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part : 0xd03
CPU revision : 4

Hardware : BCM2709
Revision : a02082
Serial : 00000000dfd603b3


lethr@zoneminder01:~$ free -m
total used free shared buff/cache available
Mem: 925 336 174 167 414 365
Swap: 0 0 0
lethr@zoneminder01:~$

I'm trying to set up 3 or 4 cameras with it (possible?) but it's quite sluggish.
I often get "Signal" events, apparently unable to communicate fast enough.

Are there some special settings I should use?
I've seen some posts for updating kernel.shmmax, but the posts were for 512M Pi devices.

I've disabled the graphical console, hoping that would help. Also set my FPS to 5 on each camera.

Thanks!

[bbunge]

One gig ram is not much. Half of that will be used by tmpfs so set your camera resolution very low 320x240 and hope there is space left in tmpfs. Might be best to install Linux sans gui.

[mikb]

"apparently unable to communicate fast enough"

Remember the network interface on a Raspberry PI is effectively an on-board USB-connected device, which can bottleneck the network. So reducing the frame rate/resolution will help there, too.