08-14-2015
I do not think there is a "solution ot f the box" and i hope you do not expect one from us.
Here are a few pointers on how to analyse the problem further:
- is the system in question connectd to a HMC? If so, is a VTerm still possible during such an outage?
- what does the errpt (and perhaps other logs, like /var/log/messages, ...) say about the time in question? Are their any entries which could be connected to the symptom?
- if there is any recurring time schema in place: have you looked at the cron jobs of all users to make certain it is not some job which causes the outage?
- do you have some sort of monitoring? What does it say about the time of the outage and the time shortly before it? You might want to set up something and wait until the next occurrence: i'd start with vmstat, netstat and ps each piped into a file. You could clean that out daily if no outage has taken place.
I hope this helps.
bakunin
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SA2(8) Linux User's Manual SA2(8)
NAME
sa2 - Write a daily report in the /var/log/sa directory.
SYNOPSIS
/usr/lib/sa/sa2
DESCRIPTION
The sa2 command is a shell procedure variant of the sar command which writes a daily report in the /var/log/sa/sardd file, where the dd
parameter indicates the current day. The sa2 command handles all of the flags and parameters of the sar command.
The sa2 command is designed to be started automatically by the cron command.
EXAMPLES
To run the sa2 command daily, place the following entry in your root or adm crontab file:
5 19 * * 1-5 /usr/lib/sa/sa2 -A &
This will generate a daily report called /var/log/sa/sardd It will also remove reports more than one week old.
FILES
/var/log/sa/sardd
Indicate the daily report file, where the dd parameter is a number representing the day of the month.
AUTHOR
Sebastien Godard <sebastien.godard@wanadoo.fr>
SEE ALSO
sar(1), sadc(8), sa1(8), mpstat(1), iostat(1), vmstat(8)
http://perso.wanadoo.fr/sebastien.godard/
Linux DECEMBER 1999 SA2(8)