使用了太多的内存(我认为）

我正试图运行一个程序来分析一堆包含数字的文本文件。文本文件的总大小约为12 MB，我从360个文本文件中的每一个文件中提取1000个替身，并将它们放入一个向量中。我的问题是，我已经完成了文本文件列表的一半，然后我的计算机速度减慢，直到不再处理任何文件。这个程序不是无限循环的，但我认为我有使用太多内存的问题。有没有更好的方法来存储这些数据，而不会占用那么多内存？

其他可能相关的系统信息：

运行Linux

8 GB内存

安装了Cern ROOT框架（我不知道如何减少内存占用）

Intel Xeon四核处理器

如果你需要其他信息，我会更新这个列表

编辑：我运行了top，我的程序使用了更多的内存，一旦它达到80%以上，我就把它杀死了。有很多代码，所以我会挑选出内存分配的位置等等。编辑2：我的代码：

void FileAnalysis::doWork(std::string opath, std::string oName)
{
//sets the ouput filepath and the name of the file to contain the results
outpath = opath;
outname = oName;
//Reads the data source and writes it to a text file before pushing the filenames into a vector
setInput();
//Goes through the files queue and analyzes each file
while(!files.empty())
{
    //Puts all of the data points from the next file onto the points vector then deletes the file from the files queue
    readNext();
    //Places all of the min or max points into their respective vectors
    analyze();
    //Calculates the averages and the offset and pushes those into their respective vectors
    calcAvg();
}
makeGraph();
}
//Creates the vector of files to be read
void FileAnalysis::setInput()
{
string sysCall = "", filepath="", temp;
filepath = outpath+"filenames.txt";
sysCall = "ls "+dataFolder+" > "+filepath;
system(sysCall.c_str());
ifstream allfiles(filepath.c_str());
while (!allfiles.eof())
{
    getline(allfiles, temp);
    files.push(temp);
}
}
//Places the data from the next filename into the files vector, then deletes the filename from the vector
void FileAnalysis::readNext()
{
cout<<"Reading from "<<dataFolder<<files.front()<<endl;
ifstream curfile((dataFolder+files.front()).c_str());
string temp, temptodouble;
double tempval;
getline(curfile, temp);
while (!curfile.eof())
{
    if (temp.size()>0)
    {
        unsigned long pos = temp.find_first_of("t");
        temptodouble = temp.substr(pos, pos);
        tempval = atof(temptodouble.c_str());
        points.push_back(tempval);
    }
    getline(curfile, temp);
}
setTime();
files.pop();
}
//Sets the maxpoints and minpoints vectors from the points vector and adds the vectors to the allmax and allmin vectors
void FileAnalysis::analyze()
{
for (unsigned int i = 1; i<points.size()-1; i++)
{
    if (points[i]>points[i-1]&&points[i]>points[i+1])
    {
        maxpoints.push_back(points[i]);
    }
    if (points[i]<points[i-1]&&points[i]<points[i+1])
    {
        minpoints.push_back(points[i]);
    }
}
allmax.push_back(maxpoints);
allmin.push_back(minpoints);
}
//Calculates the average max and min points from the maxpoints and minpoints vector and adds those averages to the avgmax and avgmin vectors, and adds the offset to the offset vector
void FileAnalysis::calcAvg()
{
double maxtotal = 0, mintotal = 0;
for (unsigned int i = 0; i<maxpoints.size(); i++)
{
    maxtotal+=maxpoints[i];
}
for (unsigned int i = 0; i<minpoints.size(); i++)
{
    mintotal+=minpoints[i];
}
avgmax.push_back(maxtotal/maxpoints.size());
avgmin.push_back(mintotal/minpoints.size());
offset.push_back((maxtotal+mintotal)/2);
}

编辑3：我添加代码是为了保留向量空间，我添加代码也是为了关闭文件，但在程序停止之前，我的内存仍然被填满了96%。。。