IoPageLockLimit

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

Data type	Range	Default value
REG_DWORD	0x0 | 0x1–0xFFFFFFFF bytes	0

Description

Specifies the maximum number of bytes that can be locked for I/O operations.

Value	Meaning
0x0	The system sets the lock limit to 512 KB.
0x1–0xFFFFFFFF bytes	The value entered takes precedence over the system default and is used as the I/O lock limit.

Note

The amount of physical memory on the computer determines the maximum lock limit. Do not set the lock limit above the following values:

Amount of physical memory	Maximum lock limit
Less than 64 MB	Physical memory minus 7 MB
64 MB–500 MB	Physical memory minus 16 MB
512 MB and greater	Physical memory minus 64 MB