你可以通过以下方法修复Node.js中的“堆出内存”错误。

Increase the amount of memory allocated to the Node.js process by using the --max-old-space-size flag when starting the application. For example, you can increase the limit to 4GB by running node --max-old-space-size=4096 index.js. Use a memory leak detection tool, such as the Node.js heap dump module, to identify and fix memory leaks in your application. You can also use the node inspector and use chrome://inspect to check memory usage. Optimize your code to reduce the amount of memory needed. This might involve reducing the size of data structures, reusing objects instead of creating new ones, or using more efficient algorithms. Use a garbage collector (GC) algorithm to manage memory automatically. Node.js uses the V8 engine's garbage collector by default, but you can also use other GC algorithms such as the Garbage Collection in Node.js Use a containerization technology like Docker which limits the amount of memory available to the container. Use a process manager like pm2 which allows to automatically restart the node application if it goes out of memory.

我遇到这个问题时，试图调试与VSCode，所以只是想添加这是如何添加参数到您的调试设置。

你可以将它添加到launch.json中配置的runtimeArgs属性中。

参见下面的示例。

{
"version": "0.2.0",
"configurations": [{
        "type": "node",
        "request": "launch",
        "name": "Launch Program",
        "program": "${workspaceRoot}\\server.js"
    },
    {
        "type": "node",
        "request": "launch",
        "name": "Launch Training Script",
        "program": "${workspaceRoot}\\training-script.js",
        "runtimeArgs": [
            "--max-old-space-size=4096"
        ]
    }
]}

我最近遇到了同样的问题，遇到了这个线程，但我的问题是React应用程序。下面对节点启动命令的更改解决了我的问题。

语法

node --max-old-space-size=<size> path-to/fileName.js

例子

node --max-old-space-size=16000 scripts/build.js

为什么max-old-space-size是16000 ?

基本上，它取决于分配给该线程的内存和您的节点设置。

如何验证和给出正确的尺寸?

这基本上是v8引擎。下面的代码帮助你理解你的本地节点v8引擎的堆大小。

const v8 = require('v8');
const totalHeapSize = v8.getHeapStatistics().total_available_size;
const totalHeapSizeGb = (totalHeapSize / 1024 / 1024 / 1024).toFixed(2);
console.log('totalHeapSizeGb: ', totalHeapSizeGb);

你也可以用以下方法改变Window的环境变量:

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

对于像我这样没有找到解决此错误的合适解决方案的初学者，请检查已安装的节点版本(x32, x64, x86)。我有一个64位CPU，我已经安装了x86节点版本，这导致CALL_AND_RETRY_LAST分配失败- JavaScript堆出内存错误。

在我的例子中，我把node.js版本升级到最新版(12.8.0版本)，它就像一个魅力。