# A1 Website Download / Help / 32 bit version with 3 gigabyte process memory address space

## Purpose

You might be able to increase speed / crawler storage capacity by increasing the user memory address space.

## Links

- http://www.microsoft.com/whdc/system/platform/server/PAE/PAEmem.mspx
  - Memory Support and Windows Operating Systems
- http://blogs.msdn.com/oldnewthing/archive/2004/08/05/208908.aspx
  - The oft-misunderstood /3GB switch
- http://blogs.msdn.com/oldnewthing/archive/2004/08/10/211890.aspx
  - Myth: Without /3GB a single program can't allocate more than 2GB of virtual memory
- http://blogs.msdn.com/slavao/archive/2006/03/12/550096.aspx
  - Be Aware: 4GB of VAS under WOW, does it really worth it?
- http://support.microsoft.com/kb/291988/
  - A description of the 4 GB RAM Tuning feature and the Physical Address Extension switch
- http://www.sysinternals.com/Information/bootini.html
  - Boot INI Options Reference
- http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dngenlib/html/msdn_ntvmm.asp
  - The Virtual-Memory Manager in Windows NT (Note: Only for the very technical)

Copyright © 2006 Thomas Schulz (see http://www.micro-sys.dk), all rights reserved.