Solaris SAR Command (ii) Check system call statistics (SAR-C)

Use the SAR-C command to display system call statistics.

$ sar-c

00:00:00 scall/s sread/s swrit/s fork/s exec/s rchar/s wchar/s

01:00:00 38 2 2 0.00 0.00 149 120

Example Check system call statistics (SAR-C)

The following example displays the output of the SAR-C command.

$ sar-c
SunOS balmyday 5.10 s10_51 sun4u 03/18/2004
00:00:04 scall/s sread/s swrit/s fork/s exec/s rchar/s wchar/s
01:00:00 89 14 9 0.01 0.00 2906 2394
02:00:01 89 14 9 0.01 0.00 2905 2393
03:00:00 89 14 9 0.01 0.00 2908 2393
04:00:00 90 14 9 0.01 0.00 2912 2393
05:00:00 89 14 9 0.01 0.00 2905 2393
06:00:00 89 14 9 0.01 0.00 2905 2393
07:00:00 89 14 9 0.01 0.00 2905 2393
08:00:00 89 14 9 0.01 0.00 2906 2393
08:20:00 90 14 9 0.01 0.01 2914 2395
08:40:01 90 14 9 0.01 0.00 2914 2396
09:00:00 90 14 9 0.01 0.01 2915 2396
09:20:00 90 14 9 0.01 0.01 2915 2396
09:40:00 880 207 156 0.08 0.08 26671 9290
10:00:00 2020 530 322 0.14 0.13 57675 36393
10:20:00 853 129 75 0.02 0.01 10500 8594
10:40:00 2061 524 450 0.08 0.08 579217 567072
11:00:00 1658 404 350 0.07 0.06 1152916 1144203
Average 302 66 49 0.02 0.01 57842 55544

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The following table describes the system invocation categories reported by the-C option. Typically, reading and writing account for half of the total system calls. However, this percentage can vary greatly as a result of the activities performed by the system.

Field name	Description
scall/s	The number of system calls of all types per second, and in systems with 4 to 6 users, there are usually approximately 30 system calls per second.
sread/s	Number of read system calls per second.
swrit/s	Number of write system calls per second.
fork/s	The number of fork system calls per second, in systems with 4 to 6 users, and about 0.5 per second system calls. If you are running a Shell script, this number will increase.
exec/s	Number of exec system calls per second. If the result of exec/s divided by fork/s is greater than 3, determine if there is an invalid PATH variable.
rchar/s	The number of characters (in bytes) transmitted by the read system call per second.
wchar/s	The number of characters (in bytes) sent by the write system call per second.

How to check disk activity (sar-d)

Use the sar-d command to display disk activity statistics.

$ sar-d

00:00:00 device%busy avque r+w/s blks/s avwait avserv

Example Check disk activity

This abbreviated example shows the output of the sar-d command.