Hello Son,
I don't sure for 100% but maybe this limitation is the file descriptors, you can check with CLI:
AP-lab>service show sysinfo
System Information:
Free RAM: 24.5% (13280 of 54024) Min: 10.0%
File Descriptors: free: 7676 used: 516 max: 25500
CPU load averages: 1 min: 5.1% 5 min: 4.6% 15 min: 4.7%
Kernel Buffers:
Size: 32 64 128 256 512 1k 2k 4k 8k 16k 32k 64k 128k
Usage: 0 0 0 0 0 0 0 0 0 0 0 0 0
Limit: 32768 10240 4096 4096 8192 8192 16384 16384 1024 512 256 64 64
AP-lab>
Regards,
Aviv