Monitoring the Web Server
Monitoring Your Web Server 2-3
The sar command (-u option) provides the following statistics:
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, 7528 8K shrd, 1448352K buff
Swap: 2096440K av, 10376K used, 2086064K free 250576K cached
PID USER PRI NI SIZE RSS SHARE STAT LIB %CPU %MEM TIME COMMAND
20892 oasport 6 0 13908 13M 5068 R 0 24.9 0.6 0:06 oraweb
20928 oasport 7 0 13652 13M 4896 R 0 24.9 0.6 0:05 oraweb
20936 rkonanga 5 0 1252 1252 916 R 0 1.4 0.0 0:00 top
15187 oasport 0 0 2232 2232 1372 S 0 0.4 0.1 0:02 xterm
20728 oasport 0 0 2984 2984 1604 S 0 0.1 0.1 0:00 oasoorb
1 root 0 0 156 136 92 S 0 0.0 0.0 0:04 init
2 root 0 0 0 0 0 SW 0 0.0 0.0 0:10 kflushd
3 root 0 0 0 0 0 SW 0 0.0 0.0 6.35 kupdate
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.
Table 2–1 CPU statistics, as reported by the sar utility
CPU Statistics Description
%usr percentage of time in which the processor is running in user
mode
%sys percentage of processes running in system time
%wio percentage the processor spends waiting on I/O requests
%idle percentage that the processor is idle