To activate this dialog select "Settings…" command in Options menu and click on "System" tab. The dialog contents are described below.
WinRAR uses this parameter to regulate system load in a multitasking environment. Usually the default priority is the best choice, so you do not need to activate this option, but if you frequently run WinRAR in the background while working with other applications, you may wish to set low priority.
Here you can specify the maximum number of CPU threads to use by WinRAR compresson and other modules. While WinRAR attempts to follow this option, sometimes the real number of active threads can exceed the specified value.
Typically the default value is optimal, but you may want to reduce it if you wish WinRAR to take less CPU resources. Reducing this parameter can downgrade WinRAR performance.
Use larger memory allocation units, which can improve archiving and, in some cases, extraction speed. Typically the performance gain is more significant for bigger compression dictionaries and slower compression methods.
This option requires "Lock pages in memory" privilege and if it is missing, WinRAR proposes to assign it to the current user account, making it available for other software too. Windows restart is necessary to activate the newly assigned privilege.
Large memory pages can't be placed to Windows swap file and always occupy the physical memory. When this option is on, Windows Task Manager can display incorrect memory usage values for WinRAR.
This option is supported by RAR archive format only.
Write error messages and information on archive damage to the file rar.log in %APPDATA%\WinRAR folder. This option is available only after registration. Use "View log…" command in Options menu to view contents of log file.
Enables to limit size of rar.log file produced by WinRAR. The minimum allowed log file value is 50KB.