FreeBSD NOTES

DESCRIPTION OF MEMORY
Mem: 9220K Active, 1M Inact, 3284K Wired, 1M Cache, 2M Buf, 1320K Free ARC: 2048K Total, 342K MRU, 760K MFU, 272K Anon, 232K Header, 442K Other Swap: 91M Total, 79M Free, 13% Inuse, 80K In, 104K Out

K:  Kilobyte

M:  Megabyte

G:  Gigabyte

%:  1/100

  Physical Memory Stats

Active:
    number of bytes active

Inact:
    number of bytes inactive

Wired:
    number of bytes wired down, including BIO-level cached file data pages

Cache:
    number of clean bytes caching data that are available for immediate reallocation

Buf:
    number of bytes used for BIO-level disk caching

Free:
    number of bytes free

  ZFS ARC Stats
These stats are only displayed when the ARC is in use.

Total:
    number of wired bytes used for the ZFS ARC

MRU:
    number of ARC bytes holding most recently used data

MFU:
    number of ARC bytes holding most frequently used data

Anon:
    number of ARC bytes holding in flight data

Header:
    number of ARC bytes holding headers

Other
    miscellaneous ARC bytes

  Swap Stats

Total:
    total available swap usage

Free:
    total free swap usage

Inuse:
    swap usage

In: bytes paged in from swap devices (last interval)

Out:
    bytes paged out to swap devices (last interval)