How to increase vm.max_map_count?

问题

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?

回答1:

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

回答2:

I use

# sysctl -w vm.max_map_count=262144 

And for the persistence configuration

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

Att.

回答3:

sysctl -w vm.max_map_count=262144

回答4:

When:

permission denied on key 'vm.max_map_count'

sudo sysctl -w vm.max_map_count=262144

回答5:

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

1. Run vim sysctl.conf

2. Add vm.max_map_count=262144 to the end of the file and save

3. Finally run sudo sysctl -w vm.max_map_count=262144 this command you will see vm.max_map_count=262144

回答6:

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

回答7:

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

来源：https://stackoverflow.com/questions/42889241/how-to-increase-vm-max-map-count