What are the three numbers that follow the load average in the UPTIME section of the Cast Iron Command Line Interface (CLI) command 'stat show all'?

Technote (FAQ)


Question

The result of Cast Iron CLI command 'stat show all' contains the UPTIME section. This section shows the CPU usage at the time the command is run. There is a part in this section which shows 'load average' followed by three numbers. What are those number and what do they mean?

Answer

Below is the output sample of the CLI command stat show all:
DISK USAGE:
Filesystem Size Used Avail Use% Mounted on
rootfs 15G 1.8G 13G 12% /
udev 12G 68K 12G 1% /dev
/dev/mapper/flash2 15G 1.8G 13G 12% /
none 15G 1.8G 13G 12% /initrd
/b/dev/shm 12G 0 12G 0% /dev/shm
tmpfs 4.0G 12K 4.0G 1% /tmp
/dev/mapper/sda1 49G 774M 45G 2% /ih_var
/dev/wip 49G 261M 46G 1% /wip

MEMORY USAGE (MB):
total used free shared buffers cached
Mem: 24157 2419 21737 0 17 601
Swap: 0 0 0

UPTIME:
12:46am up 0:10, 1 user, load average: 0.00, 0.19, 0.19

ACTIVE PROCESSES:
PID TTY STAT TIME MAJFL TRS DRS RSS %MEM COMMAND
6892 ? S<s 0:00 3 239 12176 5104 0.0 arbd
7061 ? Sl 0:00 3 200 53675 5448 0.0 ihhostnetd
7544 ? S 0:00 0 32 10611 4456 0.0 ciosrm --monitor=disk
8275 ? Sl 0:00 7 525 58202 6832 0.0 hwstatus
7060 ? Sl 0:00 0 183 28920 5244 0.0 ihaxecd
6956 ? S 0:00 0 13 21246 2136 0.0 fed[fenetd.conf]
6958 ? S 0:00 0 13 4854 1936 0.0 fed[fesysd.conf]
6960 ? S 0:00 0 13 21246 2192 0.0 fed[feappd.conf]
7028 ? S 0:00 0 4 2987 784 0.0 wd
7693 ? Sl 1:07 0 43 2357992 989148 3.9 wmc
7653 ? Sl 0:19 0 43 1631804 409088 1.6 derbyserver
7725 ? Sl 0:17 0 43 2290744 314796 1.2 maestro

An explanation to this information is excerpted from Wikipedia:
The load average represents the average system load over a period of time. It conventionally appears in the form of three numbers which represent the system load during the last one-, five-, and fifteen-minute periods. For systems with multiple CPUs, one must divide the number by the number of processors in order to get a comparable percentage.
For example, one can interpret a load average of "1.73 0.50 7.98" on a single-CPU system as:

  • during the last minute, the CPU was overloaded by 73% (1 CPU with 1.73 runnable processes, so that 0.73 processes had to wait for a turn)
  • during the last 5 minutes, the CPU was underloaded 50% (no processes had to wait for a turn)
  • during the last 15 minutes, the CPU was overloaded 698% (1 CPU with 7.98 runnable processes, so that 6.98 processes had to wait for a turn)

For more information, refer to this Wikipedia entry.

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Document information


More support for:

WebSphere Cast Iron Cloud integration

Software version:

6.1.0.15, 6.3.0.1, 6.4.0.2, 7.0.0.1

Operating system(s):

Firmware, Linux

Software edition:

Physical, Virtual

Reference #:

1595029

Modified date:

2014-04-09

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