[CALUG] Strange behaviour

[Rajiv Gunja]

This is not on Linux, but on Solaris/Unix.

I have a few servers on which I am running a few commands via cron.
Examples commands: date, uptime, sar, netstat, dladm, prstat, ping.

Here is the command sequence I am having the issue:

ldavg=`uptime | cut -d":" -f4`

DDATE1=`date +'%Y.%d.%h.%H.%M.%S'`

echo "$DDATE1 >>> $ldavg" >> /var/adm/save/2ping/load.avg.log 2>&1
In the log file, on some servers, once every hour, it will miss output of
the variable $ldavg. So the entried will look like this :


2013.04.Jun.07.23.24 >>> 1.12, 1.23, 1.25

2013.04.Jun.07.24.29 >>> 1.03, 1.18, 1.23

2013.04.Jun.07.25.35 >>> 1.10, 1.18, 1.22

2013.04.Jun.07.26.40 >>> 1.45, 1.30, 1.26

2013.04.Jun.07.27.45 >>>

2013.04.Jun.07.28.50 >>> 1.10, 1.23, 1.24

2013.04.Jun.07.29.55 >>> 1.08, 1.20, 1.23

2013.04.Jun.07.31.01 >>> 1.66, 1.29, 1.26

2013.04.Jun.07.32.06 >>> 1.27, 1.25, 1.25

I have no explanation as to why this would miss and that too at exactly
that time every hour. My script runs these commands once a minute, every
hour.

(Don't throw up your hands, I am trying to find what is causing slowness
and sometimes, makes the server go out of the network).

I have seen load average reach 577, at which point, even the
/var/adm/messages, sulog does not get updated.
How can I debug this issue? Please advise.
Thanks

-GG
Rajiv G Gunja
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.unknownlamer.org/pipermail/calug/attachments/20130604/8cea69f6/attachment.htm