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Oracle Solaris Administration: Common Tasks Oracle Solaris 11 Information Library |
1. Locating Information About Oracle Solaris Commands
2. Managing User Accounts and Groups (Overview)
3. Managing User Accounts and Groups (Tasks)
4. Booting and Shutting Down an Oracle Solaris System
5. Working With Oracle Configuration Manager
6. Managing Services (Overview)
9. Managing System Information (Tasks)
10. Managing System Processes (Tasks)
11. Monitoring System Performance (Tasks)
Where to Find System Performance Tasks
System Performance and System Resources
Processes and System Performance
About Monitoring System Performance
Displaying System Performance Information (Task Map)
Displaying Virtual Memory Statistics (vmstat)
How to Display Virtual Memory Statistics (vmstat)
How to Display System Event Information (vmstat -s)
How to Display Swapping Statistics (vmstat -S)
How to Display Interrupts Per Device (vmstat -i)
Displaying Disk Utilization Information (iostat)
How to Display Disk Utilization Information (iostat)
How to Display Extended Disk Statistics (iostat -xtc)
Displaying Disk Space Statistics (df)
How to Display Disk Space Information (df -k)
Monitoring System Activities (Task Map)
Monitoring System Activities (sar)
How to Check File Access (sar -a)
How to Check Buffer Activity (sar -b)
How to Check System Call Statistics (sar -c)
How to Check Disk Activity (sar -d)
How to Check Page-Out and Memory (sar -g)
Checking Kernel Memory Allocation
How to Check Kernel Memory Allocation (sar -k)
How to Check Interprocess Communication (sar -m)
How to Check Page-In Activity (sar -p)
How to Check Queue Activity (sar -q)
How to Check Unused Memory (sar -r)
How to Check CPU Utilization (sar -u)
How to Check System Table Status (sar -v)
How to Check Swapping Activity (sar -w)
How to Check Terminal Activity (sar -y)
How to Check Overall System Performance (sar -A)
Collecting System Activity Data Automatically (sar)
Running the sadc Command When Booting
Running the sadc Command Periodically With the sa1 Script
Producing Reports With the sa2 Shell Script
12. Managing Software Packages (Tasks)
14. Scheduling System Tasks (Tasks)
15. Setting Up and Administering Printers by Using CUPS (Tasks)
16. Managing the System Console, Terminal Devices, and Power Services (Tasks)
17. Managing System Crash Information (Tasks)
18. Managing Core Files (Tasks)
19. Troubleshooting System and Software Problems (Tasks)
20. Troubleshooting Miscellaneous System and Software Problems (Tasks)
Three commands are involved in the automatic collection of system activity data: sadc, sa1, and sa2.
The sadc data collection utility periodically collects data on system activity and saves the data in a file in binary format, one file for each 24-hour period. You can set up the sadc command to run periodically (usually once each hour), and whenever the system boots to multiuser mode. The data files are placed in the /var/adm/sa directory. Each file is named sadd, where dd is the current date. The format of the command is as follows:
/usr/lib/sa/sadc [t n] [ofile]
The command samples n times with an interval of t seconds, which should be greater than five seconds between samples. This command then writes to the binary ofile file, or to standard output.
The sadc command should be run at system boot time to record the statistics from when the counters are reset to zero. To make sure that the sadc command is run at boot time, the svcadm enable system/sar:default command writes a record to the daily data file.
The command entry has the following format:
/usr/bin/su sys -c "/usr/lib/sa/sadc /var/adm/sa/sa`date +%d`"
To generate periodic records, you need to run the sadc command regularly. The simplest way to do so is to uncomment the following lines in the /var/spool/cron/crontabs/sys file:
# 0 * * * 0-6 /usr/lib/sa/sa1 # 20,40 8-17 * * 1-5 /usr/lib/sa/sa1 # 5 18 * * 1-5 /usr/lib/sa/sa2 -s 8:00 -e 18:01 -i 1200 -A
The sys crontab entries do the following:
The first two crontab entries cause a record to be written to the /var/adm/sa/sadd file every 20 minutes from 8 a.m. to 5 p.m., Monday through Friday, and every hour on the hour otherwise.
The third entry writes a record to the /var/adm/sa/sardd file hourly, Monday through Friday, and includes all sar options.
You can change these defaults to meet your needs.
Another shell script, sa2, produces reports rather than binary data files. The sa2 command invokes the sar command and writes the ASCII output to a report file.
The sar command can be used either to gather system activity data itself or to report what has been collected in the daily activity files that are created by the sadc command.
The sar command has the following formats:
sar [-aAbcdgkmpqruvwy] [-o file] t [n]
sar [-aAbcdgkmpqruvwy] [-s time] [-e time] [-i sec] [-f file]
The following sar command samples cumulative activity counters in the operating system every t seconds, n times. The t should be five seconds or greater. Otherwise, the command itself might affect the sample. You must specify a time interval in which to take the samples. Otherwise, the command operates according to the second format. The default value of n is 1. The following example takes two samples separated by 10 seconds. If the -o option were specified, samples are saved in binary format.
$ sar -u 10 2
Other important information about the sar command includes the following:
With no sampling interval or number of samples specified, the sar command extracts data from a previously recorded file. This file is either the file specified by the -f option or, by default, the standard daily activity file, /var/adm/sa/sadd, for the most recent day.
The -s and -e options define the starting time and the ending time for the report. Starting and ending times are of the form hh[:mm[:ss]], where hh, mm, and ss represent hours, minutes, and seconds.
The -i option specifies, in seconds, the intervals between record selection. If the -i option is not included, all intervals that are found in the daily activity file are reported.
The following table lists the sar options and their actions.
Table 11-5 Options for the sar Command
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Using no option is equivalent to calling the sar command with the -u option.
This version of the sadc command writes a special record that marks the time when the counters are reset to zero (boot time).
Note - Do not edit a crontab file directly. Instead, use the crontab -e command to make changes to an existing crontab file.
# crontab -e sys
0 * * * 0-6 /usr/lib/sa/sa1 20,40 8-17 * * 1-5 /usr/lib/sa/sa1 5 18 * * 1-5 /usr/lib/sa/sa2 -s 8:00 -e 18:01 -i 1200 -A
For more information, see the crontab(1) man page.