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What is the memory limit for the Testcontainers Cloud session?

Fixed 8G of RAM

Each Testcontainers Cloud session gets 8G of RAM. You can see this information in the logs when the connection is established:

Connected to docker: 
Server Version: 70+testcontainerscloud
API Version: 1.41
Operating System: Ubuntu 22.04 LTS
Total Memory: 7396 MB

Currently, it's not possible to extend or limit memory usage for a single Testcontainers Cloud session.