Allocation failed javascript heap out of memory перевод

[Solved] fatal error: ineffective mark-compacts near heap limit allocation failed – javascript heap out of memory

The fatal error: ineffective mark-compacts near heap limit allocation failed – javascript heap out of memory occurs if there is any memory leak or the application consumes a lot of memory.

In this article, we will look at what exactly is the fatal error: ineffective mark-compacts near heap limit allocation failed – javascript heap out of memory means and how to resolve this error.

What is fatal error: ineffective mark-compacts near heap limit allocation failed – javascript heap out of memory?

If you are building and running the application on Node.JS version 10, and if you have any kind of memory leak in the code, it can lead to javascript heap out of memory.

It can also happen if the application consumes too much memory and mainly while processing extensive data.

The memory management in Node V10 is entirely different when compared to the latest version, and by default, 512 MB of memory/heap size is allocated in Node 10. If the application crosses this size, it will result in a javascript heap out of memory.

How to fix fatal error: ineffective mark-compacts near heap limit allocation failed – javascript heap out of memory?

We can resolve this issue by installing the latest Node version or by increasing the default allocated memory size. Also, you need to check if there is any memory leak in the application.

Solution 1 – Install Latest Node Version

The Node 10 has a different way of memory allocation, and by default, the max size set is 512MB. Hence you can install the latest LTS Node 12/16 to resolve the issue.

Solution 2 – Increase the Memory Size using export

Increasing the default memory size will fix the issue; you could increase the memory allocation by running the below command.

The size can be of any number according to the needs, the below command is just an indicative examples on how to increase the memory size.

export NODE_OPTIONS="--max-old-space-size=5120" # Increases to 5 GB export NODE_OPTIONS="--max-old-space-size=6144" # Increases to 6 GB export NODE_OPTIONS="--max-old-space-size=7168" # Increases to 7 GB export NODE_OPTIONS="--max-old-space-size=8192" # Increases to 8 GB

Solution 3 – Set the memory through NODE_OPTIONS

We can change the default memory size using the set NODE_OPTIONS as shown below.

set NODE_OPTIONS=--max_old_space_size=4096

Note: All the solution above works effectively, but you should always ensure there is no memory leak on your application first before changing these values and also ensure you have the free memory space left.

Conclusion

The fatal error: ineffective mark-compacts near heap limit allocation failed – javascript heap out of memory happens when you run the application with Node 10 version, and your application consumes more than 512MB memory.

We can resolve the issue by upgrading to the latest version of Node as the memory allocation is managed efficiently. Alternatively, we can increase the default memory size using the NODE_OPTIONS .

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How to solve JavaScript heap out of memory error

Last Updated Jul 13, 2022

When running JavaScript process using Node, you may see an error that stops the running process.

The fatal error says JavaScript heap out of memory as seen below:

Sometimes, it also has alternative error message like this:

Both errors above occur when JavaScript has a lot of processes to handle, and the default allocated memory by Node is not enough to finish the running process.

An example of this error can be found when you have to build the packages you installed using npm install with the node-gyp library.

The default Node memory limit varies from version to version, but the latest Node version 15 still has a memory limit below 2GB.

Solve JavaScript heap out of memory error

To fix JavaScript heap out of memory error, you need to add the —max-old-space-size option when running your npm command.

Here’s an example of increasing the memory limit to 4GB:

If you want to add the option when running the npm install command, then you can pass the option from Node to npm as follows:

If you still see the heap out of memory error, then you may need to increase the heap size even more. The memory size starts from 1024 for 1GB:

Alternatively, you can also set the memory limit for your entire environment using a configuration file.

Set Node memory limit using configuration file

You can set the default memory limit using your terminal client’s configuration file.

If you’re using Bash, then add the following line to your .bashrc file:

When you’re using ZSH, then add the line above to the .zshrc file.

Don’t forget to check the available memory in your machine before increasing the memory limit.

Too much memory allocated for Node may cause your machine to hang.

Why JavaScript heap out of memory occurs?

Before the creation of Node, JavaScript’s role in web development is limited to manipulating DOM elements in order to create an interactive experience for the users of your web application.

But after the release of Node, JavaScript suddenly had a back-end architecture, where you can run complex database queries and other heavy processing before sending data back to the front-end.

JavaScript also saw the rise of npm that allows you to download libraries and modules like React and Lodash.

Many modules downloaded from npm have lots of dependencies on other modules, and some may need to be compiled before they can be used.

Node memory usage will increase as you have more tasks to process. This is why JavaScript may have a heap out of memory error today.

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Allocation failed javascript heap out of memory перевод

Last updated: Feb 26, 2023
Reading time · 4 min

# JavaScript Heap out of memory error [Solved]

The «JavaScript heap out of memory» error occurs when the default amount of memory allocated by Node.js is insufficient to complete the given command.

To solve the error, set the —max-old-space-size option when running the command, e.g. —max-old-space-size=8192 .

The following 2 error messages represent the same error.

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FATAL ERROR: Ineffective mark-compacts near heap limit Allocation failed - JavaScript heap out of memory FATAL ERROR: CALL_AND_RETRY_LAST Allocation failed - JavaScript heap out of memory 

The first thing you should try is to use the —max-old-space-size option to set the max memory size.

The memory size is set in megabytes.

Use the following command to increase the memory limit when starting your Node.js server.

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node --max-old-space-size=8192 index.js 

You basically have to add the —max-old-space-size=8192 to the command that starts your server.

The code sample sets the memory limit to 8GB.

If you got the error when installing a package, use the following command instead.

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node --max-old-space-size=8192 $(which npm) install express 

Make sure to replace express with the name of the package you’re trying to install.

If you have to issue the command often, set it in the scripts section of your package.json file.

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 "scripts":  "prod": "node --max-old-space-size=8192 index.js" > > 

You would now issue the command with npm run prod .

8129 divided by 8 is 1024 (1 GB). You can set the —max-old-space-size flag to multiples of 1024 .

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# set to 4 GB node --max-old-space-size=4096 index.js # set to 6 GB node --max-old-space-size=6144 index.js # set to 8 GB node --max-old-space-size=8129 index.js # set to 10 GB node --max-old-space-size=10177 index.js # set to 12 GB node --max-old-space-size=12225 index.js # set to 14 GB node --max-old-space-size=14273 index.js 

If the heap memory consumption exceeds the limit, then V8 crashes the Node.js process and throws the error.

If you set the memory too high, the additional heap usage might cause your system to run out of memory and crash random processes.

According to the Node.js docs, on a machine that has 2GB of memory, consider setting —max-old-space-size to 1.5 GB to leave some memory for other uses.

# Setting the —max-old-space-size option with an environment variable

Alternatively, you can set the —max-old-space-size option using the NODE_OPTIONS environment variable.

# Setting the NODE_OPTIONS environment variable on macOS or Linux

If you are on Windows, click on the following subheading:

If you are on macOS or Linux, issue the following command.

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export NODE_OPTIONS=--max-old-space-size=8192 

To make the environment variable persist between sessions, add the following line toward the end of your ~/.bashrc , ~/.bash_profile or ~/.zshrc file.

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export NODE_OPTIONS=--max-old-space-size=8192 

If you aren’t sure what type of shell you use, issue the ps -p $$ command.

You can use the gedit command to edit your profile file.

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sudo gedit ~/.bashrc sudo gedit ~/.bash_profile sudo gedit ~/.zshrc 

Or the nano command if you prefer to add the line in your terminal.

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sudo nano ~/.bashrc sudo nano ~/.bash_profile sudo nano ~/.zshrc 

If you don’t have any of the specified files, check if you have a file named ~/.profile or create a ~/.bash_profile file.

Once you add the export NODE_OPTIONS line at the end of your profile file, use the source command to update your shell session.

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source ~/.bashrc source ~/.bash_profile source ~/.zshrc 

You can also close and reopen your terminal to restart the shell session if the issue persists.

Use the echo $NODE_OPTIONS command to verify the environment variable has been set.

# Setting the NODE_OPTIONS environment variable on Windows

You can set the NODE_OPTIONS environment variable on Windows by issuing the following command in CMD.

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setx NODE_OPTIONS --max-old-space-size=8192 

Alternatively, you can set the environment variable in PowerShell.

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$env:NODE_OPTIONS="--max-old-space-size=8192" 

Try to restart your server or install the npm package after increasing your max allocated memory.

Alternatively, you can set the NODE_OPTIONS environment variable using the graphic user interface.

1. Click on View advanced system settings.
2. Click on Environment Variables.

1. Set the NODE_OPTIONS environment variable to —max-old-space-size=8192 (8 GB) or another value, e.g. —max-old-space-size=6144 (6 GB).

1. Click OK 3 times to add the environment variable.
2. Restart your CMD and PowerShell sessions for the changes to take effect.

Try to start your development server or install your npm package after making the changes.

# Setting the NODE_OPTIONS environment variable directly in package.json

Alternatively, you can set the NODE_OPTIONS environment variable for all operating systems directly in your package.json file.

Open your terminal and install the cross-env package by running the following command.

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npm install --save-dev cross-env 

The cross-env package is used to set environment variables universally, in a way that works on all operating systems.

Add the command that sets the NODE_OPTIONS environment variable right before the command that starts your script in package.json .

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 "scripts":  "prod": "cross-env NODE_OPTIONS='--max-old-space-size=8192' index.js" > > 

Now when you issue the npm run prod command, the NODE_OPTIONS environment variable gets set right before starting your server.

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