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Pipelines: Increase the Build Container Memory above 1024mb

I am constantly running into the memory limit of the build container, which is, according to the documentation, 1024mb. It is nice that I have 4gb in total (that is, including all the used services) at my disposal, but in my case, I do not need any external services and would rather use the entire 4gb for the build container.

Is there any configuration option that I can use to do so? Even after extensive searching and trial&error, I can't seem to make the build container use more than 1024mb, which is unfortunate.

1 answer

4 votes

Hi Jan,

By default, the build container has 4GB of memory.

If you add a service container, each will take 1GB of the total 4GB memory.

e.g. 2 service containers. Each service container will have 1GB and the build container will have 2GB of memory.

If you'd like to alter the memory usage of your containers, you have two options:

An example using both features:

pipelines:
default:
- step:
size: 2x # Total memory is 8GB
services:
- my-service-container # Will consume 512MB
script:
# The build container will have 7.5GB remaining.
- echo "Build container memory usage in megabytes:" && echo $((`cat /sys/fs/cgroup/memory/memory.memsw.usage_in_bytes | awk '{print $1}'`/1048576))

definitions:
services:
my-service-container:
image: a-docker-image:tag
memory: 512

Thanks,

Phil

Docs here may be misleading then. They suggest:

  • Regular steps have 4096 MB of memory in total, large build steps (which you can define using size: 2x) have 8192 MB in total.

  • The build container is given 1024 MB of the total memory, which covers your build process and some Pipelines overheads (agent container, logging, etc).

In other words they suggest that the build container is NOT given 4GB, but 1. It is not clear how size: 2x affects this.

In my case no service container was involved, yet a memory limit was reached on the build container (or on Container 'Build' ?). Setting size: 2x did seem to solve the problem although it's hard to tell if this was necessary.

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