Large Pages

[anutavision]

Windows 7-8
In 64-bit Windows Vista/7 can benefit from so-called large memory pages. Depending on the hash table size the speed improvement may be between 5% and 20%.
To enable this feature, you need to modify the Group Policy for your account on your computer:
1. Run: gpedit.msc (or search for "Group Policy")
2. Under "Computer Configuration", "Windows Settings", "Security Settings", "Local Policies" click on "User Rights Assignment"
3. In the right pane double-click the option "Lock Pages in Memory"
4. Click on "Add User or Group" and add your account or "Everyone"
5. You may have to logoff or reboot for the change to take effect
Run your chess GUI with administrative rights ("Run as Administrator"), and check the "Large_Pages" UCI option for Engine.
Note: If memory is fragmented the Large Page allocation may fail and engine will fall back to standard memory page usage.
use program utility to defragment memory ----> Optimize RAM (Random Access Memory)