Weird CPU Usage

[irrashai]

Hi!
I'm trying mailcleaner and it's working great except for this one.
Could someone give me an idea what happened or what problem is it? Using "top" on the server shows just around 20-30% load.
Thanks!

[n0lqu]

That happened to me as well a couple weeks ago, not sure what caused it. I fixed it by looking up documentation on the RRDTOOLS that create the graphs, finding the graph data files at /var/mailcleaner/spool/rrdtools/127.0.0.1 and using the 'rrdtool' utility to dump the CPU data to a text file, editing the text file to remove the huge numbers -- I replaced numbers with e+04 or larger with 'NaN' (Not a Number) -- and then using the rrdtools to convert the text file back to a binary rrd file. There were a few dozen numbers to change and it was a bit of a pain, but it worked for me. Here's documentation on the rrd tools:
http://oss.oetiker.ch/rrdtool/doc/rrdtool.en.html

As an example, I did it something like this:

Code: Select all

cd /var/mailcleaner/spool/rrdtools/127.0.0.1
/usr/rrdtools/bin/rrdtool dump cpu.rrd >cpu.xml

Edit cpu.xml using your favorite text editor and replace huge numbers, numbers ending in e+04 through e+07 in my case, with NaN or zero. Then make a backup and convert the text file back to binary:

Code: Select all

cp cpu.rrd cpu.rrd.backup
/usr/rrdtools/bin/rrdtool restore cpu.xml cpu.rrd

I don't know if it would be better to shut down or disable the rrd process or something before doing this; I did it live while everything was running. Next RRD update (every 5 minutes?) the graph was back to normal.

[irrashai]

thanks! that fixed it.

[irrashai]

i guess i spoke too soon.

although it's not as huge as my first post, it's still going above 100% but not 200%.

i guess there's something wrong somewhere, or is that normal?

[n0lqu]

If your system is a dual-processor (or dual-core) system, then the CPU graph might go to 200% -- ours does.

Using the technique above it's easy to find the values that are ordered of magnitude off, but if you have some erroneous values that are just a little off it's probably not worth trying to fix; you can at least see the normal values now, instead of that single vertical line that made everything else vanish.

[irrashai]

thanks again.

i didn't bother fixing it again.

as for the system, it's not dual core.

[suhasingale]

Your processor may be HT technology then. Can you confirm?

[irrashai]

sorry my mistake, it's dual core.