SOS

The Real-time Performance Data Utility

SOS is the character-based tool that will monitor and report system performance online and in real time. To start SOS, type SOS from the MPE command prompt.

Figure 3.1 shows the Global Summary screen, the main data screen displayed in SOS.

Figure 3.1 SOS Global Summary screen

Data Screens

The SOS application generates a variety of useful data screens. Each screen is outlined in "SOS Screen Selection Menu", then described in detail in Chapters 8 through 23.

Screen Conventions

The conventions used in SOS data screens are listed and described in Table 3.1.

Table 3.1 SOS screen conventions

Convention	Description
/	A forward slash character (/) indicates a rate. For example, "Page Fault/s" denotes "Page Fault per second".
k or K	A "k" or a "K" indicates the corresponding value is measured in kilobytes.
m or M	An "m" or an "M" indicates the corresponding value is measured in megabytes.
ms	"ms" indicates the corresponding value is measured in milliseconds.
s	An "s" indicates the corresponding value is measured in seconds.
min	"min" indicates the corresponding value is measured in minutes.
Labels	The eight labels across the bottom of any screen, reading from left to right, correspond to the function keys F1 through F8 on the keyboard.
<	A "<" sign means the value displayed is greater than zero and less than 0.1.
>>	">>" indicates a data value that cannot be converted by SOS, because the value is less than or greater than the eligible range.
[ ]	The number outside the brackets ([ ]) is the value for the current session and the value inside the brackets is the average or accumulated value since SOS/3000 was last reset or started.

NOTE Most functions and commands may be entered in either upper or lower case.