node 内存溢出_<--- last few gcs ---> [4712:000001e62c0a4580] 626

<--- Last few GCs --->
 
[24332:000001ED3A02F230]    23391 ms: Mark-sweep (reduce) 8032.8 (8041.3) -> 8032.5 (8036.3) MB, 5119.3 / 0.0 ms  (+ 5.5 ms in 2 steps since start of marking, biggest step 5.5 ms, walltime since start of marking 5323 ms) (average mu = 0.270, current mu = [24332:000001ED3A02F230]    28990 ms: Mark-sweep (reduce) 8192.5 (8196.3) -> 8192.5 (8196.0) MB, 5520.6 / 0.0 ms  (average mu = 0.142, current mu = 0.014) allocation failure scavenge might not succeed
 
 
<--- JS stacktrace --->
 
FATAL ERROR: Reached heap limit Allocation failed - JavaScript heap out of memory
 1: 00007FF7BE2E013F v8::internal::CodeObjectRegistry::~CodeObjectRegistry+112495
 2: 00007FF7BE26F396 DSA_meth_get_flags+65526
 3: 00007FF7BE27024D node::OnFatalError+301
 4: 00007FF7BEBA19EE v8::Isolate::ReportExternalAllocationLimitReached+94
 5: 00007FF7BEB8BECD v8::SharedArrayBuffer::Externalize+781
 6: 00007FF7BEA2F61C v8::internal::Heap::EphemeronKeyWriteBarrierFromCode+1468
 7: 00007FF7BEA2C754 v8::internal::Heap::CollectGarbage+4244
 8: 00007FF7BEA2A0D0 v8::internal::Heap::AllocateExternalBackingStore+2000
 9: 00007FF7BEA47D40 v8::internal::FreeListManyCached::Reset+1408
10: 00007FF7BEA483F5 v8::internal::Factory::AllocateRaw+37
11: 00007FF7BEA5A0EE v8::internal::FactoryBase<v8::internal::Factory>::AllocateRawArray+46
12: 00007FF7BEA5CD4A v8::internal::FactoryBase<v8::internal::Factory>::NewFixedArrayWithFiller+74
13: 00007FF7BEA5CC6D v8::internal::FactoryBase<v8::internal::Factory>::NewFixedArray+77
14: 00007FF7BE9060F3 v8::internal::FeedbackNexus::ic_state+61859
15: 00007FF7BE92D867 v8::Message::GetIsolate+83559
16: 00007FF7BE92CACF v8::Message::GetIsolate+80079
17: 00007FF7BE880F40 v8::internal::JSArray::SetLength+240
18: 00007FF7BE8FF629 v8::internal::FeedbackNexus::ic_state+34521
19: 00007FF7BE791A85 v8::internal::CompilationCache::IsEnabledScriptAndEval+27701
20: 00007FF7BEC2F3E1 v8::internal::SetupIsolateDelegate::SetupHeap+494417
21: 000001ED3BDF1521

// 全局变量
let total = []
//内存溢出
const toolsMemory = async (req, res) => {
  const { uid } = req.body
 
  function getMemory(n = 1) {
    let memory = process.memoryUsage()
    console.log(`rss：${(memory.rss / 1024 / 1024).toFixed(1)}MB`)
    console.log(`external：${(memory.external / 1024 / 1024).toFixed(1)}MB`)
    console.log(
      `arrayBuffers:${(memory.arrayBuffers / 1024 / 1024).toFixed(1)}MB`
    )
    console.log(`申请到内存：${(memory.heapTotal / 1024 / 1024).toFixed(1)}MB`)
    console.log(`已使用内存：${(memory.heapUsed / 1024 / 1024).toFixed(1)}MB`)
 
    let totalmem = os.totalmem() // 以整数形式返回系统内存总量（以字节为单位B）
    let freemem = os.freemem() // 以整数形式返回空闲的系统内存量（以字节为单位B）。
    console.log(
      `系统总内存：${(totalmem / 1024 / 1024).toFixed(1)}\n系统空闲内存：${(
        freemem /
        1024 /
        1024
      ).toFixed(1)}`
    )
    console.log(`--------------------循环了${n}次`)
    return `
    rss：${(memory.rss / 1024 / 1024).toFixed(1)}MB
    external：${(memory.external / 1024 / 1024).toFixed(1)}MB
    arrayBuffers:${(memory.arrayBuffers / 1024 / 1024).toFixed(1)}MB
    申请到内存：${(memory.heapTotal / 1024 / 1024).toFixed(1)}MB
    已使用内存：${(memory.heapUsed / 1024 / 1024).toFixed(1)}MB
    系统总内存：${(totalmem / 1024 / 1024).toFixed(1)}\n系统空闲内存：${(
      freemem /
      1024 /
      1024
    ).toFixed(1)}
    `
  }
 
  // 每次都会接受一个大数组
  // function useMem() {
  //   let size = 20 * 1024 * 1024
  //   let arr = new Array(size)
  //   return arr
  // }
 
  // for (let j = 0; j < 100; j++) {
  //   getMemory(j + 1)
  //   total.push(useMem())
  // }
  // console.log('success')
 
  let info = getMemory()
 
  res.send({
    code: 200,
    data: {
      uid,
      info,
    },
    message: '成功',
  })
}

解决方案：

  "scripts": {
    "dev1": "cross-env PORT=85 NODE_ENV=development NODE_OPTIONS=--max_old_space_size=8096 nodemon --inspect --max_old_space_size=8096 app.js",
    "dev11": "cross-env PORT=85 NODE_OPTIONS=--max_old_space_size=8096 node --max-old-space-size=8096 app.js",
    "limit": "cross-env LIMIT=8096 increase-memory-limit"
  },

参考链接：

https://www.cnblogs.com/IwishIcould/p/17019276.html