Is There a Limit on Number of Open Files in Windows

Is there a limit on number of open files in Windows

The C run-time libraries have a 512 limit for the number of files that can be open at any one time. Attempting to open more than the maximum number of file descriptors or file streams causes program failure. Use _setmaxstdio to change this number. More information about this can be read here

Also you may have to check if your version of windows supports the upper limit you are trying to set with _setmaxstdio. For more information on _setmaxstdio check here

Information on the subject corresponding to VS 2015 can be found here

Is there a limit on the maximum number of files that can be opened in C#?

The upper limit on files opened by .NET is governed by the limit imposed on the Win32 API CreateFile, which is 16384.

Getting the open file limit

In POSIX-compatible systems (which I think includes Windows):

#include <sys/resource.h>

struct rlimit lim;
getrlimit(RLIMIT_NOFILE, &lim);
rlim_t max_files = lim.rlim_cur;

Python: Which command increases the number of open files on Windows?

Try to use win32file from pywin32:

import win32file
print win32file._getmaxstdio() #512

win32file._setmaxstdio(1024)
print win32file._getmaxstdio() #1024

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