Windows Memory Management Registry Key Guide

In Windows, core memory management configurations and paging file behaviors are controlled directly through the Windows Registry. This article identifies the exact registry path responsible for system memory management parameters, details the essential values stored within this key, and provides clear steps to navigate and manage these settings using the Registry Editor (Regedit).

The Registry Path

The registry key that stores Windows memory management and paging parameters is located at:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management

This key dictates how the Windows kernel handles physical RAM, allocates system pools, and manages virtual memory across storage drives.

Key Values and Paging Parameters

Within the Memory Management key, several values govern memory behavior:

• PagingFiles: A REG_MULTI_SZ value that defines the drive locations, initial sizes, and maximum sizes (in megabytes) for the system’s pagefiles (e.g., C:\pagefile.sys 2048 4096).
• ClearPageFileAtShutdown: A REG_DWORD value (0 or 1). When set to 1, Windows overwrites the paging file with zeros during shutdown for enhanced security.
• DisablePagingExecutive: A REG_DWORD value (0 or 1). When set to 1, kernel-mode drivers and system code are forced to run in physical RAM rather than being paged to disk.
• LargeSystemCache: A REG_DWORD value (0 or 1). Setting this to 1 optimizes system cache for large file operations, commonly used on Windows Server environments.
• NonPagedPoolSize and PagedPoolSize: Values that manually limit or allocate the pool space available to the system, typically managed automatically by Windows.

How to Access the Key in Regedit

1. Press Win + R, type regedit, and press Enter.
2. Paste the following path into the top address bar: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management
3. Press Enter to navigate directly to the key.
4. Locate the desired parameter in the right-hand pane, double-click it, and adjust the value data as needed.
5. Restart your computer for changes to take effect.