100% full CPU
 

Dear Friends ...?

I have a MRTG server running the incredible number of 456 interfaces. The PC is an Athlon 1300, 20 Gb HDD, 512 Mb RAM.

I put all the config files to run on the crontab, creating a concurrency scheme. It is great because in 30seconds I finish my job, but the CPU goes to 100%.
When it occurs (50% of the time), it is difficult to access the machine as Web Server (to see the MRTG graphics) or FTP Server (to download the MRTG logs).
Is there a way to distribute the configs processing more conveniently, in order to take always 10%-or-more-free CPU ?

thanks

Would it help to include the "nice" command in your crontab entry?

i.e.
nice +15 <command-to-run>

See "man nice"

This would allow the command run by cron to use all resources when running alone, but would allow other processes access when they request it.

For anything that is already running, you can also
renice
the process.

man renice

Renice'ing a process group causes all processes in the process group to have their scheduling priority altered. Renice'ing a user causes all processes owned by the user to have their scheduling priority altered. By default, the processes to be affected are specified by their process ID's.

RO

People
The correct syntax is nice -n 15 <command>.
It worked, but I do not see any changes in CPU behaviour, maybe because of top / gtop limitations.
Is there a tool that draws second-by-second graphics of CPU load, memory load etc for Linux ?

Is there a tool that draws second-by-second graphics of CPU load, memory load etc for Linux ?
Doesn't MRTG have snapons for that?
If it's one offs you want, use Xosview, else search Freshmeat.net for "atsar" or "sar" if you want to have longterm reporting.

I am not sure when it came out, but in 8.0, there is a system monitor GUi that does this. Try gtop in the command line. Refer to your system documentation, there is a GUI tool somewhere in your 'Redhat' start menu.

RO

Yes, in RedHat 8 the hwbrowser appears to do that, but at 7.2 not.

Did gtop work? I found that by google with 'redhat 7.2 system monitor'. It brought up that rpm.

RO

Yes, gtop works, but bar graphics do not give notion of the CPU`s behaviour. It shows what is happening now, but what happened some seconds before is forgotten.