HP-UX System Administrator's Guide: Overview

processes listed first in the top output are consuming the most processing
time. top also shows global system load factors.
vmstat The vmstat command reports certain statistics kept about process, virtual
memory, trap, and CPU activity. It also can clear the accumulators in the
kernel sum structure.
Tools for Monitoring the Performance of a Network
Monitoring the performance of a network can be an involved process involving many
different variables. For sophisticated network troubleshooting and performance
monitoring, HP offers the OpenView Network Node Manager. For information about
the Network Node Manager’s features and capabilities, and how to acquire it see:
http://openview.hp.com/products/nnm/index.html
If your needs are simply to verify communications between two computers, you can
use the ping command which will send packets from one computer to another and
time how long it takes to receive a reply. You can do some basic tuning of network
performance by tweaking various network settings and running ping to see if the
response time improves or worsens. For example:
Example 4-1 Testing network performance using ping
To test a network connection between two systems called “thissystem” and
“thatsystem”, from a local command prompt on “thissystem” enter the command:
/usr/sbin/ping thatsystem
PING thatsystem.xxx.yyy.com:
64 byte packets
64 bytes from 10.17.123.456: icmp_seq=0. time=1. ms
64 bytes from 10.17.123.456: icmp_seq=1. time=0. ms
64 bytes from 10.17.123.456: icmp_seq=2. time=0. ms
64 bytes from 10.17.123.456: icmp_seq=3. time=0. ms
Ping will keep sending/receiving packets until you stop it by using the interrupt
character (usually CTRL-C). It will then terminate the packet sending and report the
final performance statistics:
----thatsystem.xxx.yyy.com PING Statistics----
4 packets transmitted, 4 packets received, 0% packet loss
round-trip (ms) min/avg/max = 0/0/1
Tools for Monitoring the Performance of Applications
Applications running on HP Integrity Servers can be extensively profiled using the HP
Caliper performance monitoring tool (Caliper). While Caliper is capable of monitoring
whole-server performance, it is primarily an application profiling tool.
Caliper makes extensive use of hardware features on HP Integrity Servers and can run
on both HP-UX 11i and Linux operating systems.
Performance Monitoring Tools 127