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Tweaking Windows XP - Part 1 - Windows XP Tweaking - Page 5

By: Gavin Ballard | Guides | Posted: Nov 3, 2001 5:00 am

Tweak #9 - Memory Performance Tweaks


There are several memory tweaks that can be performed with Windows XP - all of them are located in the


HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlSession ManagerMemory Management


section of the registry.





Disable Paging Executive


In normal usage, XP pages sections from RAM memory to the hard drive. We can stop this happening and keep the data in RAM, resulting in improved performance. Note that only users with a large amount of RAM (256MB+) should use this setting. The setting we want to change to disable the 'Paging Executive', as it is called, is called DisablePagingExecutive. Changing the value of this key from 0 to 1 will de-activate memory paging.


System Cache Boost


Changing the value of the key LargeSystemCache from 0 to 1 will tell Windows XP to allocate all but 4MB of system memory to the file system cache, basically meaning that the XP Kernel can run in memory, greatly improving it's speed. The 4MB of memory left is used for disk caching, but if for any reason more is needed, XP allocates more. Generally, this tweak improves performance by a fair bit but can, in some intensive applications, degrade performance. As with the above tweak, you should have at least 256MB of RAM before attempting to enable LargeSystemCache.


*Important* - Since posting this tweak, I have received a few emails reporting that on systems with large amounts of RAM (more than 1GB) and with multiple large hard drives, this tweak can result in instability and possible data loss. Like all of the tweaks listed in these guides, this is 'at your own risk', however if you are concerned, please check out this website for more information.


Input/Output Performance


This tweak is only really valuable to anyone running a server - it improves performace while a computer is performing large file transfer operations. By default, the value does not appear in the registry, so you will have to create a REG_DWORD value called IOPageLockLimit. The data for this value is in bytes, and defaults to 512KB on machines that have the value. Most people using this tweak have found maximum performance in the 8 to 16 megabyte range, so you will have to play around with the value to find the best performance. Remeber that the value is measured in bytes, so if you want, say, 12MB allocated, it's 12 * 1024 * 1024, or 12582912. As with all these memory tweaks, you should only use this if you have 256MB or more of RAM.


Tweak #10 - Speeding Up Share Viewing





This is a great tweak. Before I found it, I was always smashing my head against the table waiting to view shares on other computers. Basically, when you connect to another computer with Windows XP, it checks for any Scheduled tasks on that computer - a fairly useless task, but one that can add up to 30 seconds of waiting on the other end - not good! Fortunately, it's fairly easy to disable this process. First, navigate to HKEY_LOCAL_MACHINE/Software/Microsoft/Windows/Current Version/Explorer/RemoteComputer/NameSpace in the Registry. Below that, there should be a key called {D6277990-4C6A-11CF-8D87-00AA0060F5BF}. Just delete this, and after a restart, Windows will no longer check for scheduled tasks - mucho performance improvement!


How much to upgrade to x64 Edition?


Microsoft Windows XP Professional x64 Edition (ZAT00008) for PC


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