Servidor con 8gb de ram y no puede con 50 online ayuda porfavor.

[colextey]

perfecto ya lo aplique:

net.ipv4.ip_forward = 0
net.ipv4.conf.default.rp_filter = 1
net.ipv4.conf.default.accept_source_route = 0
kernel.sysrq = 0
kernel.core_uses_pid = 1
net.ipv4.tcp_synack_retries = 2
net.ipv4.conf.all.send_redirects = 0
net.ipv4.conf.default.send_redirects = 0
net.ipv4.conf.all.accept_source_route = 0
net.ipv4.conf.all.accept_redirects = 0
net.ipv4.conf.all.secure_redirects = 0
net.ipv4.conf.all.log_martians = 1
net.ipv4.conf.default.accept_source_route = 0
net.ipv4.conf.default.accept_redirects = 0
net.ipv4.conf.default.secure_redirects = 0
net.ipv4.icmp_echo_ignore_broadcasts = 1
net.ipv4.tcp_syncookies = 1
net.ipv4.conf.all.rp_filter = 1
net.ipv4.conf.default.rp_filter = 1
error: "net.ipv6.conf.default.router_solicitations" is an unknown key
error: "net.ipv6.conf.default.accept_ra_rtr_pref" is an unknown key
error: "net.ipv6.conf.default.accept_ra_pinfo" is an unknown key
error: "net.ipv6.conf.default.accept_ra_defrtr" is an unknown key
error: "net.ipv6.conf.default.autoconf" is an unknown key
error: "net.ipv6.conf.default.dad_transmits" is an unknown key
error: "net.ipv6.conf.default.max_addresses" is an unknown key
kernel.exec-shield = 1
kernel.randomize_va_space = 1
net.ipv4.tcp_rmem = 4096 87380 8388608
net.ipv4.tcp_wmem = 4096 87380 8388608
net.core.rmem_max = 8388608
net.core.wmem_max = 8388608
net.core.netdev_max_backlog = 5000
net.ipv4.tcp_window_scaling = 1
fs.file-max = 100000
kernel.pid_max = 65536
net.ipv4.ip_local_port_range = 2000 65000
vm.dirty_background_ratio = 20
vm.dirty_ratio = 25
fs.aio-max-nr = 1048576

al ejecutar el comando sysctl -p me dio lo anterior todo bien?