Dear David,
If you are periodically waking to take data, then you really need to be
using "crontab" as it is essentially built for this type of behavior.
The gotcha with crontab is that you need to establish environment
variables as part of your program's execution. If you would like I shall
endeavor to remember the angle on this.
Once it is running you can say pretty much any interval you would like.
Once you beat the environment variable issue, crontab can be very "nice"
(no pun intended :^)
Regards,
Flint
On Wed, 18 Apr 2018, Dave Jones wrote:
Date: Wed, 18 Apr 2018 06:36:36 -0700
From: Dave Jones <djo...@itconline.com>
Reply-To: Linux on 390 Port <LINUX-390@VM.MARIST.EDU>
To: LINUX-390@VM.MARIST.EDU
Subject: Linux "sleep" command not waking up under high CPU utilization
Hello, gang.
I have a very simple bash script that runs a trivial data collection
task, and then does a Linux "sleep im" to wait a minute before running
the data collection task again. Under very high CPU loads (> 90%) I have
noticed that the "sleep" command does not seem to wake up after one
minute but instead wakes up 15 to 20 minutes later. This is on a Red Hat
6.9 guest running under z/VM 6.4 on a z12 box.
I would like to buy a clue here if I could.
Thanks.
DJ
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DAVID JONES | MANAGING DIRECTOR FOR ZSYSTEMS SERVICES | z/VM, Linux, and
Cloud
703.237.7370 (Office) | 281.578.7544 (CELL)
INFORMATION TECHNOLOGY COMPANY [1]
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Kindest Regards,
☮ Paul Flint
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