Docker dashboard server memory

Guys, I have a cluster of 7 servers with opensearch and a server with dashboards.

This server (from dashboards) has 32gb of ram, but despite having placed the item mem_limit: 16g in the docker-compose.yml environment, I have the impression that it has not been using more than 2Gb of ram in total.

Is there any configuration I can do to increase this memory?

I’ll send a picture to show.