System:getSystemInfo

Method

Purpose

This method (on Linux) returns operating system information.

Type

Synchronous, IMPACT_INFO.

Arguments

None.

Returns


Name	Type	Description
Up Time	Integer	The system up time in seconds. (Time since last reboot.)
Run Queue Length	Integer	The length of the run queue (number of processes)
Real Memory	Integer	The total real memory (in kilobytes)
Free Memory	Integer	The total free memory (in kilobytes)
% Free Real Memory	Integer	The total percentage of free real memory
% Buffers Memory	Integer	The total percentage of memory used to cache file or disk blocks
% Cached Memory	Integer	The total percentage of memory used to cache page files
Avg Running	Double	Average number of processes running over 1 minute
Avg Running (5 min)	Double	Average number of processes running over 5 minutes
Avg Running (15 min)	Double	Average number of processes running over 15 minutes
% Time Usage	Double	% Time Usage
Total Processes	Integer	The total processes currently on the system
Context Switches	Long	The total number of context switches of the CPU from one process to another
Device Interrupts	Long	The total number of device interrupts currently on the computer system
Buffers	Long	The amount of physical RAM, in kilobytes, used for file buffer
Cache Memory	Long	The amount of physical RAM, in kilobytes, used as cache memory
SwapCached	Long	The amount of swap, in kilobytes, used as cache memory
Page Cache Memory Active	Long	The total amount of buffer or page cache memory, in kilobytes, that is in active use. This is memory that has been recently used and is usually not reclaimed for other purposes.
Page Cache Memory Free	Long	The total amount of buffer or page cache memory, in kilobytes, that are free and available. This is memory that has not been recently used and can be reclaimed for other purposes.
High Total Memory	Long	The total amount of memory, in kilobytes, that is not directly mapped into kernel space
High Free Memory	Long	The free amount of memory, in kilobytes, that is not directly mapped into kernel space
Low Total Memory	Long	The total amount of memory, in kilobytes, that is directly mapped into kernel space
Low Free Memory	Long	The free amount of memory, in kilobytes, that is directly mapped into kernel space
Dirty Memory	Long	The total amount of memory, in kilobytes, waiting to be written back to the disk
WriteBack Memory	Long	The total amount of memory, in kilobytes, actively being written back to the disk
Mapped Memory	Long	The total amount of memory, in kilobytes, which have been used to map devices, files, or libraries using the mmap command
Slab Memory	Long	The total amount of memory, in kilobytes, used by the kernel to cache data structures for its own use
Committed_AS	Long	The total amount of memory, in kilobytes, estimated to complete the workload. This value represents the worst case scenario value, and also includes swap memory
PageTable Memory	Long	The total amount of memory, in kilobytes, dedicated to the lowest page table level
VmallocTotal	Long	The total amount of memory, in kilobytes, of total allocated virtual address space
VMallocUsed Memory	Long	The total amount of memory, in kilobytes, of used virtual address space
VmallocChunk Memory	Long	The largest contiguous block of memory, in kilobytes, of available virtual address space
HugePages_Total	Long	The total number of hugepages for the system
HugePages_Free	Long	The total number of hugepages available for the system
Hugepagesize	Long	The size for each hugepages unit in kilobytes
Active(anon)	Long	Active anonymous pages
Inactive(anon)	Long	Inactive anonymous pages
Active(file)	Long	Active page cache
Inactive(file)	Long	Inactive page ache
Unevictable	Long	These pages aren't going anywhere, they are pinned, cannot be swapped or reclaimed. Includes kernel pages and Mlocked pages
Mlocked	Long	Just mlocked() pages from userspace, amount of allocated memory that’s strictly prohibited from being paged out
AnonPages	Long	(Anonymous Pages) field denotes allocated pages which have no backing storage, will include anonymous hugepages
Shmem	Long	In-kernel data structures cache, depicts the amount of shared memory used by group(s) processes. Size of shared memory, anybody who did mmap() with MAP_SHARED\|MAP_ANONYMOUS
Sreclaimable	Long	Part of Slab, that might be reclaimed, such as caches
Sunreclaim	Long	Part of Slab, that cannot be reclaimed on memory pressure
KernelStack	Long	Pages used for kernel stack space
NFS_Unstable	Long	NFS pages sent to the server, but not yet committed to stable storage
Bounce	Long	Memory used for block device 'bounce buffers'
WritebackTmp	Long	Memory used by FUSE for temporary writeback buffers
CommitLimit	Long	This is the total amount of memory currently available to be allocated on the system, expressed in kilobytes.This limit is adhered to only if strict overcommit accounting is enabled
HardwareCorrupted	Long	The amount of memory in "poisoned pages", for example, memory which has failed (as flagged by Error Correcting Code (ECC) typically). ECC memory is capable of correcting small errors and detecting larger ones. If an error that cannot be corrected is detected using ECC (in memory or cache, depending on the system's hardware support), then the Linux kernel marks the corresponding page as poisoned.
AnonHugePages	Long	Non-file backed huge pages mapped into user-space page tables
HugePages_Rsvd	Long	This is the number of huge pages for which a commitment to allocate from the pool has been made, but no allocation has yet been made. These reserved huge pages guarantee that an application will be able to allocate a huge page from the pool of huge pages at fault time
HugePages_Surp	Long	This is the number of huge pages in the pool
DirectMap4k	Long	Counts the number of pages mapped as 4kB pages. It gives an indication of the load for Translation Lookaside Buffer (TLB), cache used to store mappings between virtual addresses and physical pages in memory.
DirectMap2M	Long	Counts the number of pages mapped as 2MB pages. It gives an indication of the load for Translation Lookaside Buffer (TLB), cache used to store mappings between virtual addresses and physical pages in memory.