About This Guide

This section includes brief descriptions of the contents of this guide and an explanation of typographical conventions used, and refers you to additional sources of information you might find helpful.

This guide explains how to use the Silicon Graphics'® Performance Co-Pilot (PCP) for Informix 7 support package to monitor INFORMIX-OnLine database performance.

What This Guide Contains

This guide has been prepared with the understanding that readers will view it with the InSight online viewing system and use it as a reference work.

Besides this Preface, this guide contains the following useful sections:


Provides an overview of INFORMIX operation with the Performance Co-Pilot running under IRIX.

“The Informix 7 Agent” 

Provides description and instruction on installing, configuring, and using the Informix 7 agent.

“The Informix Response-Time Agent” 

Provides a description of the agent that measures Informix server response time with an ICMP echo-type method.

“The Virtual Processor Visualizer (vpvis)” 

Provides a description of the visual tool used to examine virtual processor activity and general CPU activity on Informix servers.

Conventions Used in This Guide

These type conventions and symbols are used in this guide:


C++ class names, C++ member functions, C++ data members, function names, language keywords and data types, literal command-line arguments (options/flags), nonalphabetic data types, operators, and subroutines.

Helvetica Bold  

Hardware labels


Backus-Naur Form entries, command monitor commands, executable names, filenames, glossary entries (online, these show up as underlined), IRIX commands, manual/book titles, new terms, onscreen button names, program variables, tools, utilities, variable command-line arguments, variable coordinates, and variables to be supplied by the user in examples, code, and syntax statements

Fixed-width type 

Error messages, prompts, and onscreen text

Bold fixed-width type 

User input, including keyboard keys (printing and nonprinting); literals supplied by the user in examples, code, and syntax statements (see also <>)


Environment variables, operator names, directives, defined constants, macros in C programs


(Double quotation marks) Onscreen menu items and references in text to document section titles


(Parentheses) Following function names—surround function arguments or are empty if the function has no arguments; following IRIX commands—surround reference page (man page) section number


(Brackets) Surrounding optional syntax statement arguments


(Angle brackets) Surrounding nonprinting keyboard keys, for example, <Esc>, <Ctrl-D>


IRIX shell prompt for the superuser (root)


IRIX shell prompt for users other than superuser


Command Monitor prompt

This guide uses the standard UNIX® convention for referring to entries in IRIX documentation. The entry name is followed by the section number in parentheses. For example, rcp(1C) refers to the rcp online reference page. In most cases, when you find mention of a reference page in this guide, you can click on the entry and the reference page is displayed.