Cisco 4700M Administration Manual page 138

Displaying System Information
Table 5-9
Table 5-9 Field Descriptions for the show system kmem Command
Field Description
Mem
Total Total usable Linux kernel RAM (physical RAM minus the reserved bits and the kernel binary code)
Used Total Linux kernel RAM in use.
Free Available Linux kernel RAM.
Shared Always zero.
Buffers Memory in buffer cache.
Cached RAM used for the page cache (disk cache) minus the RAM used for the swap cache.
Swap
Total Total amount of physical swap memory.
Used Total swap memory in use.
Free Available swap memory.
MemTotal Total usable Linux kernel RAM (physical RAM minus the reserved bits and the kernel binary code).
MemFree Available Linux kernel RAM.
MemShared Always zero.
Buffers Memory in buffer cache.
Cached RAM used for the page cache (disk cache) minus the RAM used for the swap cache.
SwapCached Memory that once was swapped out, is swapped back in, but is still in the swap file. If this memory
is needed, it does not need to be swapped out again because it is already in the swap file. This saves
I/O.
Active Memory that has been used recently and usually not reclaimed unless it is absolutely necessary.
Inactive Memory that is unused or easily freeable.
HighTotal Total amount of memory in the high memory (highmem) region. Highmem is all memory above
approximately 860 MB of physical RAM. The kernel uses indirect methods to access the high
memory region. Data cache can go in this memory region.
HighFree Total amount of available memory in the highmem area.
LowTotal Amount of memory in the low memory region (non-highmem memory).
LowFree Amount of free memory in the low memory region. The kernel can address low memory directly. All
kernel data structures need to go into low memory.
SwapTotal Total amount of physical swap memory.
SwapFree Available swap memory.
Committed_AS An estimate of how much RAM you would need to make a 99.99% guarantee that there never is an
out-of-memory (OOM) condition for a particular workload. Normally, the kernel overcommits
memory. For example, if you dynamically allocate 1 GB of memory, no demand is placed on that
memory until you actually start using it. The Committed_AS is an estimate of how much RAM or
swap memory you would need in a worst-case scenario.
Cisco 4700 Series Application Control Engine Appliance Administration Guide
5-10
describes the fields in the show system kmem command output.
Chapter 5 Displaying ACE Hardware and Software System Information
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