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Version: 0.5

Memory

You can configure Acorn apps to have a set memory upon startup.

This allows you to specify memory that an Acorn will abide by when being created. There are a number of ways to set this so that you have full control over defaults, workloads, and maximums. In order of precedence, the ways to set memory are when you:

  1. Run an Acorn
  2. Author an Acornfile
  3. Install Acorn
note

When installing Acorn, you can also specify --workload-memory-maximum. This flag sets a maximum that when exceeded prevents the offending Acorn from being installed.

Valid memory values​

Supported value formats for memory flags include

  • 1_234 ->1234
  • 5M -> 5_000_000
  • 1.5Gi ->1_610_612_736
  • 0x1000_0000 -> 268_435_456

These all translate into an exact amount of bytes. We encourage you use the binary representation of large quantities of bytes when interacting with memory such as Ki, Mi, Gi, and Pi.

No limit​

It is possible to set any of these flags to have no limit on memory by simply setting their value to 0. However, running an Acorn with its memory set to 0 while the --workload-memory-maximum is not set to 0 will roughly translate to "use as much memory as allowed". For example, say that we install Acorn with a non-zero --workload-memory-maximum.

acorn install --workload-memory-maximum 512Mi

Then we try to run an Acorn with its memory set to 0.

acorn run --memory 0 foo

When the foo Acorn gets provisioned, all of its containers will have their memory set to 512Mi (the --workload-memory-maximum we set prior).

note

This same interaction will occur if the --workload-memory-default is set to 0 (which it is by default)