PerformanceWiki [the blog]

Log SAR output to a file for later replay / analysis

Commands below are for Linux, but the idea works everywhere ’sadc’ is available.

1) Start

/usr/lib/sa/sadc

Example

machine1:~ # /usr/lib/sa/sadc 2 7200 sadc.outfile

this logs SAR data for 4 hours.

2) Stop logging, do

‘killall sadc’ or ‘kill’

3) Usage of sar. Creating report with all options

sar -A -f

Example

machine1:~ # sar -A -f sadc.outfile > sar.outfile
machine1:~ # cat sar.outfile
Linux 2.4.21-75-default (machine1) 12/03/03

13:35:34 proc/s
Average: 0.00

13:35:34 cswch/s
Average: 38.50

13:35:34 CPU %user %nice %system %idle
Average: all 0.06 0.00 0.00 99.94

13:35:34 INTR intr/s
Average: sum 0.00

13:35:34 pgpgin/s pgpgout/s activepg inadtypg inaclnpg inatarpg
Average: 0.00 16.00 9931 0 0 0

13:35:34 pswpin/s pswpout/s
Average: 0.00 0.00

13:35:34 tps rtps wtps bread/s bwrtn/s
Average: 0.75 0.00 0.75 0.00 32.00

13:35:34 CPU %user %nice %system %idle
Average: 0 0.00 0.00 0.00 100.00
Average: 1 0.00 0.00 0.00 100.00
Average: 2 0.00 0.00 0.00 100.00
Average: 3 0.25 0.00 0.00 99.75

13:35:34 frmpg/s shmpg/s bufpg/s campg/s
Average: -0.50 0.00 0.50 0.00

13:35:34 kbmemfree kbmemused %memused kbmemshrd kbbuffers kbcached kbswpfree kbswpused %swpused
Average: 8860 114108 92.79 0 21996 42764 2097112 0 0.00

13:35:34 dentunusd file-sz %file-sz inode-sz super-sz %super-sz dquot-sz %dquot-sz rtsig-sz %rtsig-sz
Average: 10558 719 5.49 7376 0 0.00 0 0.00 0 0.00

13:35:34 Iface rxpck/s txpck/s rxbyt/s txbyt/s rxcmp/s txcmp/s rxmcst/s
Average: lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Average: sit0 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Average: eth1 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Average: eth0 2.00 0.50 381.50 66.00 0.00 0.00 0.00

13:35:34 Iface rxerr/s txerr/s coll/s rxdrop/s txdrop/s txcarr/s rxfram/s rxfifo/s txfifo/s
Average: lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Average: sit0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Average: eth1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Average: eth0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

13:35:34 totsck tcpsck udpsck rawsck ip-frag
Average: 116 4 2 0 0

13:35:34 runq-sz plist-sz ldavg-1 ldavg-5
Average: 0 43 0.00 0.01

13:35:34 DEV tps blks/s
Average: dev94-0 0.75 32.00