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I have the following problem, my actual ubunt 12.04 linux became during one year extremely slowly. Everything is slow, booting ... . Now firefox is not coming up. the iostat command shows, that the CPUs are 99% idle:
Use the "top" command to identify the process(s) that are using the most memory. When it's running, hit "M" to sort by memory usage. Alternately, hit "G", then hit "3" to show the memory grouping page.
p.s. - Those need to uppercase "M" and "G" above, lowercase are different commands.
please find attachted a typical top output. The computer is equipped with 4 cores in two CPUs, 8 GB memory and 8 GB swap. It does not seem that the hardware resources are insufficient.
Hello,
The hard disc sda is a SSD-disk: OCZ agility 2
Does anybody has an idea?
Best Regards,
Lutz
What does "sudo hdparm -tT /dev/sda" outputs (its a basic read/write speed test, safe to do)?
Also try copying large files (around 500mb or larger) in some graphical application that reports write speeds.
what I do not understand:
Hava a look at the memory use:
Mem: 8177592k total, 6787404k used, 1390188k free,
There are no applications running and already 6,7 GB of 8 GB memory are in use. But the memory output does not tell me the processes using the memory:
No process uses more than 2% of the memory!
There are no applications running and already 6,7 GB of 8 GB memory are in use. But the memory output does not tell me the processes using the memory:
No process uses more than 2% of the memory!
Thanks, I started now the grapical interface for system processes. They show that only 680 MB of 7.8GB memory is used by ubuntu. The four cores are use only approximately 10% of there resources, each. Never the less, I am not able to start any larger application, e.g. firefox.
Thanks, I started now the grapical interface for system processes. They show that only 680 MB of 7.8GB memory is used by ubuntu. The four cores are use only approximately 10% of there resources, each. Never the less, I am not able to start any larger application, e.g. firefox.
What happens (output) when you start firefox in a terminal?
What happens (output) when you start firefox in a terminal?
I started firefox in a terminal and nothing happened over hours. No error massages.
Then I started firefox using the option -jsconsole to open the error console, also nothing happend.
With respect to LatencyTop:
When I started LatencyTop in an alpha-numeric Terminal (e.g. Str Alt F1), it starts immediately. Using the classical gnome graphical interface, it took hours. If an application is running using the gnome surface e.g. system monitoring the output is alright.
The problems seem to have something to do with the window manager. I used the new ubuntu and classical gnome but the problem is independent of the window manager.
Can you ssh into the slow computer from another computer (thus bypassing any window manager or GUI stuff), and see what kind of performance you are getting over that ssh connection?
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