Question

将（2~3兆字节）二进制文件转换为其他格式时出现虚拟内存异常错误。此错误仅发生在具有100 MB虚拟内存的低性能PC上。 Performance report in realtime (.net Memory profiler)

这是发生内存使用量增加的代码：

Using reader As BinaryReader = New BinaryReader(New FileStream(strSrcFileName, FileMode.Open))
    Dim BuffOffset As Integer 'offset of reading the DAT file every time
    Dim RecSize As Integer 'no of records to process each time
    While intRecordsCount > 0 'reader.BaseStream.Position <> reader.BaseStream.Length
        If intRecordsCount > RecordsChunck Then
            RecSize = RecordsChunck
            intRecordsCount -= RecordsChunck
        Else
            RecSize = intRecordsCount
            intRecordsCount = 0
        End If
        Dim tempBuffer(RecSize * intRecordLength - 1) As Byte
        Dim outputbuffer(RecSize * (intRecordLength - 8) - 1) As Byte

        reader.BaseStream.Seek(BuffOffset, SeekOrigin.Begin)
        reader.Read(tempBuffer, 0, tempBuffer.Length)
        BuffOffset += tempBuffer.Length 'prepare the offset for the next reading

                'conversion is done here

        'append the converted buffer into the target binary file
        Using writer As BinaryWriter = New BinaryWriter(File.Open(strTargetFileName, FileMode.Append))
            writer.Write(outputbuffer)
        End Using
    End While 
End Using

在附加目标文件（编写器流）

时，会按预期发生增加

我的问题是，在加载源文件和目标文件时，我可以做些什么来避免（大量）内存使用情况，以及在这种情况下最佳做法是什么？

处理大型二进制文件时的虚拟内存异常

0 个答案: