# pmm ## Command Function This command is used to check the usage of the physical pages and page cache of the system memory. ## Syntax pmm ## Parameters None ## Usage This command is available only in the **Debug** version. ## Example Run **pmm**. ## Output **Figure 1** Viewing the usage of physical pages ![](figure/viewing-the-usage-of-physical-pages.png "viewing-the-usage-of-physical-pages") **Table 1** Output

Output	Description
phys_seg	Address of the physical page control block
base	First physical page address, that is, start address of the physical page memory
size	Size of the physical page memory
free_pages	Number of free physical pages
active anon	Number of active anonymous pages in the page cache
inactive anon	Number of inactive anonymous pages in the page cache
active file	Number of active file pages in the page cache
inactive file	Number of inactive file pages in the page cache
pmm pages	total: indicates the total number of physical pages. used: indicates the number of used physical pages. free: indicates the number of free physical pages.