Red Hat Bugzilla – Bug 106645
Slow performance on inactive machine
Last modified: 2015-01-04 17:03:30 EST
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.4) Gecko/20030624
Description of problem:
If I don't log in to the console and leave the computer idle for a period of
time (>15 minutes?) the performance becomes very slow via remote access to the
machine via ssh. Performance is between 8-12 times slower than if console is
active (no screensaver active). Deactivating screensaver but not logging in to
console returns performance to normal.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Boot up machine, compile code using ant or running hdparm -t -T /dev/hda
either logged into console or via ssh. Performance is great (probably better
than under 7.3 which was the last RHL on the machine).
2. Leave machine running for a period of time, screen saver or equivalent kicks
in, runlevel 3 or 5. Ssh into box and compile code using ant or run "hdparm -t
-T /dev/hda". Performance is noticably slower, java takes 10-12 times longer,
hdparm shows performance is 8-10 times slower from step 1.
3. Stay connected via ssh, hit left arrow button on X terminal to bring up login
screen, do nothing else on console. Run same tests as above via ssh.
Performance returns to normal. I haven't tried this under runlevel 3 but will
in the morning.
Actual Results: Slow performance when machine is inactive
Expected Results: Normal performance when machine is inactive
Which screensaver specifically is running, and is it a GL screensaver? If
it's random or you're not sure, can you please check the output of ps and
find out which saver is running at the time? Alternatively pick a single
screensaver out of the bunch. Try to determine which if any particular
screensaver makes a difference.
That should help to determine if it is the screensaver application itself
or perhaps something else at fault. If it only occurs with OpenGL screensavers,
then please attach your X server log, X server config file, and a copy
of /var/log/messages as individual uncompressed file attachments using
bugzilla file attach below.
screensavers run at +10 by default. It's configurable.
fc1 - eol