How to increase vm.max_map_count?

I'm trying to run Elastic search in an Ubuntu EC2 machine (t2.medium).

But I'm getting the message:

max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]

How can I increase the vm.max_map_count value?

110720 次浏览

小开

sysctl -w vm.max_map_count=262144

小开

最佳答案

To make it persistent, you can add this line:

vm.max_map_count=262144

in your /etc/sysctl.conf and run

$ sudo sysctl -p

to reload configuration with new value

小开

When:

permission denied on key 'vm.max_map_count'

sudo sysctl -w vm.max_map_count=262144

小开

Following command as worked fine on Fedora 28 (Linux 4.19 Kernel)

sudo echo "vm.max_map_count=262144" >> /etc/sysctl.d/elasticsearchSpecifications.conf && sudo sysctl --system

小开

I use

# sysctl -w vm.max_map_count=262144

And for the persistence configuration

# echo "vm.max_map_count=262144" >> /etc/sysctl.conf

Att.

小开

If you are using ubuntu VM, then navigate to etc folder.

Run vim sysctl.conf
Add vm.max_map_count=262144 to the end of the file and save
Finally run sudo sysctl -w vm.max_map_count=262144 this command you will see vm.max_map_count=262144

小开

Note that

From version 207 and 21x, systemd only applies settings from /etc/sysctl.d/*.conf and /usr/lib/sysctl.d/*.conf. If you had customized /etc/sysctl.conf, you need to rename it as /etc/sysctl.d/99-sysctl.conf. If you had e.g. /etc/sysctl.d/foo, you need to rename it to /etc/sysctl.d/foo.conf.

See https://wiki.archlinux.org/index.php/sysctl#Configuration

So add vm.max_map_count=262144 in /etc/sysctl.d/99-sysctl.conf and then run

sudo sysctl --system

小开

I found that when adding the settings to /etc/sysctl.conf, the system actually saved the changes to /etc/sysctl.d/99-sysctl.conf.

And when saving the changes to /etc/sysctl.d/99-sysctl.conf, it's also saved to /etc/sysctl.conf, so I think they both point to the same file.