nodejs中的缓冲区大小

Question

// node v0.5.6 //

我假设nodejs可以在nodejs堆之外分配的最大缓冲区大小受可用系统内存量的限制.虽然我有几次免费内存,但我似乎无法在没有崩溃节点的情况下接近该限制.

致命错误:JS分配失败 - 处理内存不足

function bigArray(){
  // each ip could be 10 digits long, therefore,
  // 10 * (bcast-cur) = size of Buffer.  
  // does that also mean size in bytes? 
  var cur = 167772160;
  var bcast = 184549375;
  var addresses = new Buffer((bcast-cur)*10);
  var offset = 0;
  while (cur <= bcast){
    cur += 1;
    addresses.writeUInt32LE(cur,offset);
    offset+=10;
  }
  return addresses;
};
var ba = bigArray();

它在此块的节点库中的Buffer.js的第235行崩溃:

if (this.length > Buffer.poolSize) {
  // Big buffer, just alloc one.
  this.parent = new SlowBuffer(this.length); //crash here
  this.offset = 0;

Answer 1

不幸的是,您收到的错误消息有点误导,但您有缓冲区溢出错误.

你的循环将一直运行直到cur == bcast,所以最后一个writeUInt32LE会写一个超过缓冲区长度的数字.将循环比较更改为"cur <bcast".