# shm\_info ## **Overview** **Related Modules:** [MEM](zh-cn_topic_0000001055518034.md) **Description:** Describes system resource information about the shared memory. ## **Summary** ## Data Fields

Variable Name

Description

__used_ids

int 

shm_tot

unsigned long 

shm_rss

unsigned long 

shm_swp

unsigned long 

__swap_attempts

unsigned long 

__swap_successes

unsigned long 

## **Details** ## **Field Documentation** ## \_\_swap\_attempts ``` unsigned long shm_info::__swap_attempts ``` **Description:** Number of swap attempts ## \_\_swap\_successes ``` unsigned long shm_info::__swap_successes ``` **Description:** Number of successful swap attempts ## \_\_used\_ids ``` int shm_info::__used_ids ``` **Description:** Number of existing shared memory segments ## shm\_rss ``` unsigned long shm_info::shm_rss ``` **Description:** Number of resident shared memory pages ## shm\_swp ``` unsigned long shm_info::shm_swp ``` **Description:** Number of shared memory pages in the swap partition ## shm\_tot ``` unsigned long shm_info::shm_tot ``` **Description:** Total number of shared memory pages