opensearch-docs-cn/docs/opensearch/install/important-settings.md

layout	title	parent	grand_parent	nav_order
default	Important settings	Install OpenSearch	OpenSearch	70

Important settings

For production workloads, make sure the Linux setting vm.max_map_count is set to at least 262144. On the OpenSearch Docker image, this setting is the default. To check, start a Bash session in the container and run:

cat /proc/sys/vm/max_map_count

To increase this value, you have to modify the Docker image. For other install types, add this setting to the host machine's /etc/sysctl.conf file with the following line:

vm.max_map_count=262144

Then run sudo sysctl -p to reload.

The sample docker-compose.yml file also contains several key settings:

• bootstrap.memory_lock=true

  Disbles swapping (along with memlock). Swapping can dramatically decrease performance and stability, so you should ensure it is disabled on production clusters.

• OPENSEARCH_JAVA_OPTS=-Xms512m -Xmx512m

  Sets the size of the Java heap (we recommend half of system RAM).

• nofile 65536

  Sets a limit of 65536 open files for the OpenSearch user.

• port 9600

  Allows you to access Performance Analyzer on port 9600.