Troubleshooting guide

13 — Monthly maintenance tasks
Alcatel-Lucent 5620 Service Aware Manager 13-5
5620 SAM
System Administrator Guide
Look for differences in the output of the data for similar loads on each
station. Such differences indicate performance degradation.
iv Press CTRL-C to stop the command.
6 If the station OS is Solaris, go to step 8.
7 Use the iostat command to collect disk read and write data for determining
whether there is a disk bottleneck.
i Type:
iostat -x time ↵
where time is the time period, in seconds, during which you need to collect data.
Alcatel-Lucent recommends that you start with 2 s
ii Review the command output. Code 13-3 is an example of RHEL iostat output;
Table 13-3 describes each output field.
Code 13-3: RHEL iostat output example
Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn
sdb 0.01 0.04 6.63 11573 1810153
sda 2.94 58.78 261.56 16040031 71372946
Table 13-3 RHEL iostat field description
iii Record the data for future comparison of platform performance. Look for
differences in the output of the data for similar loads on each station, which
indicate performance degradation.
iv Press CTRL-C to stop the iostat command.
8 Use the iostat command to collect disk read and write data for determining
whether there is a disk bottleneck.
i Type:
iostat -x time ↵
where time is the time period, in seconds, during which you need to collect data.
Alcatel-Lucent recommends that you start with 2 s
ii Review the command output. Code 13-4 is an example of Solaris mpstat
output; Table 13-4 describes each output field.
Heading Description
device Name of the device
tps Transfers per second
Blk_read/s Block reads per second
Blk_wrtn/s Block writes per second
Blk_read Total blocks read
Blk_wrtn Total blocks written
Release 12.0 R6 | November 2014 | 3HE 08861 AAAF TQZZA Edition 01