How many PPTP connection when CCR1036-12G-4S-EM, I found router dead n need reboot manytime when handle around 8000

RouterOS General
1

I use CCR1036-12G-4S-EM to handle PPTP connections from others mikrotik, and make static route to manage remote network, solution look like connect many branch office to HQ.

I found that the VPN server,CCR1036-12G-4S-EM , dead and hang need to reboot manytime in a day with around 8000+ connection.

any idea please?