Node.js 缓冲区的最大大小是多少
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原文地址: http://stackoverflow.com/questions/8974375/
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What's the maximum size of a Node.js Buffer
提问by Joel
I got a fatal error reading a file was too big to fit in a buffer.
我在读取文件太大而无法放入缓冲区时遇到致命错误。
FATAL ERROR: v8::Object::SetIndexedPropertiesToExternalArrayData() length exceeds max acceptable value
Or,
或者，
RangeError: "size" argument must not be larger than 2147483647 at Function.Buffer.allocUnsafe (buffer.js:209:3)
RangeError: "size" 参数在 Function.Buffer.allocUnsafe (buffer.js:209:3) 处不得大于 2147483647
If I try to allocate a 1GB Buffer I get the same fatal Error,
如果我尝试分配 1GB 缓冲区，我会得到同样的致命错误，
var oneGigInBytes = 1073741824;
var my1GBuffer = new Buffer(oneGigInBytes); //Crash
What is the maximum size of a Node.js Buffer class instance?
Node.js Buffer 类实例的最大大小是多少？
采纳答案by Vyacheslav Egorov
Maximum length of a typed array in V8 is currently set to kSmiMaxValuewhich depending on the platform is either:
V8 中类型化数组的最大长度当前设置为kSmiMaxValue取决于平台：
- 1Gb - 1byte on 32-bit
- 2Gb - 1byte on 64-bit
- 1Gb - 32 位 1 字节
- 2Gb - 64 位 1 字节
Relevant constant in the code is v8::internal::JSTypedArray::kMaxLength(source).
代码中的相关常量是v8::internal::JSTypedArray::kMaxLength（source）。
V8 team is working on increasing this even further on 64-bit platforms, where currently ArrayBufferobjects can be up to Number.MAX_SAFE_INTEGERlarge (2**53 - 1). See bug 4153.
V8 团队正在努力在 64 位平台上进一步增加这一点，目前ArrayBuffer对象可以达到Number.MAX_SAFE_INTEGER大 (2**53 - 1)。请参阅错误 4153。
回答by Evan Carroll
This is now documented as part of Node's bufferapi, the maximum size is buffer.constants.MAX_LENGTH.
这现在被记录为Node 的bufferapi 的一部分，最大大小为buffer.constants.MAX_LENGTH.
buffer.constants.MAX_LENGTH<integer>The largest size allowed for a single Buffer instance.
- On 32-bit architectures, this value is
(2^30)-1(~1GB).- On 64-bit architectures, this value is
(2^31)-1(~2GB).This value is also available as
buffer.kMaxLength.
buffer.constants.MAX_LENGTH<integer>单个 Buffer 实例允许的最大大小。
- 在 32 位架构上，此值为
(2^30)-1(~1GB)。- 在 64 位架构上，此值为
(2^31)-1(~2GB)。此值也可用作
buffer.kMaxLength.
So you can figure out how big it is by doing
所以你可以通过做来弄清楚它有多大
> (require('buffer').constants.MAX_LENGTH + 1) / 2**30
2
回答by Anthony
Seems like the current max buffer size is 2147483647 bytes aka 2.147GB
似乎当前的最大缓冲区大小是 2147483647 字节，也就是 2.147GB
Source: https://stackoverflow.com/a/44994896/3973137(and my own code)
来源：https: //stackoverflow.com/a/44994896/3973137（和我自己的代码）
