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The sar command (-u option) provides the following statistics:
Table 2–1 CPU statistics, as reported by the sar utility
CPU Statistics
%usr
%sys
%wio
%idle
Using the top Utility
You can use the top utility to view the ongoing processor activity in real time. Please
refer to the man pages for usage.
Example:
$ top
4.:16pm up 15 days, 5:39 23 users, load average: 0.51, 0.38, 0.49
265 processes: 261 sleeping, 3 running, 1 zombie, 0 stopped
CPU states: 7.1% user, 44.3% system, 0.0% nice, 48.4% idle
Mem: 2009664K av, 1954828K used, 54836K free, 75288K shrd, 1448352K buff
Swap: 2096440K av, 10376K used, 2086064K free
PID USER
20892 oasport
20928 oasport
20936 rkonanga
15187 oasport
20728 oasport
Monitoring the Web Server
Monitoring is essential to performance tuning. The Oracle HTTP Server provides
server side status information, including current server statistics, via the
mod_status module. To obtain these server status reports, you must configure the
web server as described below.
PRI NI
6
0 13908
7
0 13652
5
0
0
0
0
0
1 root
0
0
2 root
0
0
3 root
0
0
Description
percentage of time in which the processor is running in user
mode
percentage of processes running in system time
percentage the processor spends waiting on I/O requests
percentage that the processor is idle
SIZE
RSS SHARE STAT LIB %CPU %MEM TIME COMMAND
13M
5068 R
13M
4896 R
1252 1252
916 R
2232 2232
1372 S
2984 2984
1604 S
156
136
92 S
0
0
0 SW
0
0
0 SW
Monitoring the Web Server
250576K cached
0 24.9 0.6 0:06 oraweb
0 24.9 0.6 0:05 oraweb
0 1.4 0.0 0:00 top
0 0.4 0.1 0:02 xterm
0 0.1 0.1 0:00 oasoorb
0 0.0 0.0 0:04 init
0 0.0 0.0 0:10 kflushd
0 0.0 0.0 6.35 kupdate
Monitoring Your Web Server 2-3
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