/etc/sysctl.d/01_ec2.conf sets vm.swappiness = 0
Dear Experts,
On one of my Lightsail instances, which was created a few years
ago from a Debian image and has subsequently been upgraded a few
times, I have a /etc/sysctl.d/01_ec2.conf file which sets
vm.swappiness = 0. On another newer EC2 instance I don't have this
file.
dpkg -S doesn't tell me where this file came from. I don't
think I created it myself!!
Does anyone recognise this? Of course the issue is that I
discovered the hard way that the system was not using its
swapfile. The file has a pile of other configuration settings
and I wonder if any of those are also undesirable, see below.
Regards, Phil.
vm.swappiness = 0
vm.dirty_ratio = 80
vm.dirty_background_ratio = 5
vm.dirty_expire_centisecs = 12000
net.core.somaxconn = 1000
net.core.netdev_max_backlog = 5000
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
net.ipv4.tcp_wmem = 4096 12582912 16777216
net.ipv4.tcp_rmem = 4096 12582912 16777216
net.ipv4.tcp_max_syn_backlog = 8096
net.ipv4.tcp_slow_start_after_idle = 0
net.ipv4.tcp_tw_reuse = 1
net.ipv4.ip_local_port_range = 10240 65535
kernel.sysrq = 0
Reply to: