Reached heap limit?

[vikr00001]

I added a new npm package on the server and I’m getting this error on Galaxy:

FATAL ERROR: Reached heap limit Allocation failed - JavaScript heap out of memory

Hmmm… it doesn’t look like I’m out of memory:

Do I need to pick a larger CPU?

[vikr00001]

Here’ s what the Meteor 3 docs AI says about it:

This error you’re seeing on Galaxy is related to memory allocation issues during the build process. Let me provide some information based on the available knowledge sources:

The error “FATAL ERROR: Reached heap limit Allocation failed - JavaScript heap out of memory” is a common issue that can occur when migrating from Meteor version 2 to version 3. This error happens when the memory allocated for the build process is insufficient, often due to a large number of dependencies being processed during the migration Common Errors.

To resolve this issue, you can try the following steps:

1. Temporarily reduce the number of Meteor packages in your .meteor/packages file by removing non-essential or outdated ones.
2. Rebuild the application with a minimal set of packages.
3. Gradually add back the packages, one at a time, to identify which one(s) might be causing the issue.
4. Update or replace outdated packages as needed.

By reducing the package footprint and updating dependencies, you should be able to complete the migration without encountering memory-related errors.

If you continue to experience issues or need more detailed monitoring of your application’s performance, you might want to consider using an Application Performance Monitor (APM) tool. Galaxy offers built-in APM capabilities for apps on the Professional plan, which can help you identify and troubleshoot performance issues Performance monitoring.

Remember, optimizing your app’s performance and resource usage is an ongoing process, and tools like Galaxy APM can provide valuable insights to help you maintain a smooth-running application.

[vikr00001]

I asked Meteor 3 Docs AI a follow-up question:

Is it possible to increase the amount of JavaScript memory that is available during the build process?

Yes, it is possible to increase the amount of JavaScript memory available during the Meteor build process. This can be particularly useful when encountering memory-related errors during migration or when working with large projects.

According to the Common Errors guide, one common issue is the “Cannot Enlarge Memory Array” error, which occurs when the memory allocated for the build process is insufficient. This often happens due to a large number of dependencies being processed, especially during migrations or when working with older or larger packages.

To address this issue and increase the available memory, you can try the following steps:

1. Temporarily reduce the number of Meteor packages in your .meteor/packages file by removing non-essential or outdated ones.

2. Rebuild the application with a minimal set of packages.

3. Gradually add back the packages, one at a time, to identify which one(s) might be causing the issue.

4. Update or replace outdated packages as needed.

Additionally, you can set the METEOR_DISABLE_OPTIMISTIC_CACHING=1 environment variable when running meteor build or meteor deploy to potentially speed up your build time and reduce memory usage. As mentioned in the Environment Variables documentation, this can help improve memory usage during the build process, which in turn can improve total build times.

By following these steps and optimizing your build process, you should be able to increase the available JavaScript memory and complete your builds without memory-related errors.

Adding METEOR_DISABLE_OPTIMISTIC_CACHING=1 did not fix it.

[vikr00001]

Fixed: I removed the npm package pos, which was really overkill for my use case, and replaced it with code that required much less memory.