Solaris Application Programming, 1/e - Chapter 4 - Parent Directory

66 Chapter 4 Informational Tools
Example 4.21 Output from sar as It Runs (continued )
ssd1,b 0 0.0 0 0 0.0 0.0
ssd1,c 0 0.0 0 0 0.0 0.0
ssd1,h 0 0.0 0 0 0.0 0.0
0.0 0 0.0 0
0 0 100 0 0 100 0 0
0.00 0.0 0.00 0.0 99
76 6 14 0.00 0.00 1550 2850
0 0 0
0 0 161 0 0 0
65/30000 0 157574/157574 0 0/0 0 0/0
0.00 0.00
0.00 0.00 0.00 0.60 2.20 0.00
0.00 0.00 0.00 0.00 0.00
247682 17041644
0 0 0 0 0 0 17858560 0
Example 4.21 presents a lot of information. The text at the beginning supplies a
template that indicates what the counters represent. The information is as follows.
First it reports the time the system spent in user (%usr), system (%sys), waiting
for block I/O (%wio), and idle (%idle).
Next is a section for each device that reports the device name, percentage of
time busy (%busy), average queue length while the device was busy (avque),
number of reads and writes per second (r+w/s), number of 512-byte blocks
transferred per second (blk/s), average wait time in ms (avwait), and average
service time in ms (avserv).
The length of the queue of runnable processes (runq_sz) and the percentage
of time occupied (%runocc) are listed next. The fields swpq-sz and %swpocc
no longer have values reported for them.
Next is the number of transfers per second of buffers to disk or other block
devices. Read transfers per second (bread/s), reads of system buffers
(lread/s), cache hit rate for reads (%rcache), write transfers per second
(bwrit/s), writes of system buffers (lwrit/s), cache hit rate for writes
(%wcache), raw physical device reads (pread/s), and raw physical device
writes (pwrit/s) are included.
Swapping activity is recorded as the number of swap-ins per second (swpin/
s), number of blocks of 512 bytes swapped in (bswin/s), number of swap-outs
per second (swpot/s), number of 512-byte blocks swapped out (bswot/s),
and number of process switches per second (pswch/s). The number of 512byte
blocks transfered includes the loading of programs.
System calls are reported as the total number of system calls per second
(scall/s), number of read calls per second (sread/s), number of write calls