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PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
6352 root 15 0 120m 23m 7120 S 9.0 0.0 0:24.65 Xorg
6861 root 15 0 279m 16m 9812 S 1.7 0.0 0:00.13 gnome-terminal
6882 root 15 0 12888 1308 820 R 0.7 0.0 0:00.04 top
6774 root 15 0 723m 102m 26m S 0.3 0.1 0:36.23 firefox
1 root 15 0 10364 688 572 S 0.0 0.0 0:02.26 init
2 root RT -5 0 0 0 S 0.0 0.0 0:00.00 migration/0
3 root 34 19 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/0
4 root RT -5 0 0 0 S 0.0 0.0 0:00.00 watchdog/0
5 root RT -5 0 0 0 S 0.0 0.0 0:00.00 migration/1
6 root 34 19 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/1
7 root RT -5 0 0 0 S 0.0 0.0 0:00.00 watchdog/1
8 root RT -5 0 0 0 S 0.0 0.0 0:00.00 migration/2
9 root 34 19 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/2
10 root RT -5 0 0 0 S 0.0 0.0 0:00.00 watchdog/2
11 root RT -5 0 0 0 S 0.0 0.0 0:00.00 migration/3
12 root 34 19 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/3
13 root RT -5 0 0 0 S 0.0 0.0 0:00.00 watchdog/3
The most recent updates from RHN were xorg-x11-server and kernel updates. I already tried rolling back to pre-update versions of both xorg and kernel - no change. Tech service at Dell couldnot suggest anything other than what I tried. RedHat sends me back to Dell. Here are processes - something unusual?
yes, 96GB of RAM, perhaps I could get away with 48GB, but I need a lot of it for bioinformatics. This is not the reason for slowing down, as it was working just fine until recently.
I wonder, in the above output for ps -A why I have as many as 15 instances of several processes? On my SciLInux55 box at home I do not have anything like that, most are single or double processes. Could this be a reason, and if so where such spawning is coming from?
I cannot use any programs as the system is slow, it is just idling in either user or root mode as I am trying to figure out what is wrong. It is slow right after login, which itself is slow (after entering password). On average it is somewhat between 30 sec to 60 sec delay in response.
After pressing 1 in to all %wa for all 16 CPU (0 to 15) stays at 0.0%. The average %CPU stays at less than 1% with two-four processes running or popping up.
When I googled processes that are present at 16 instances, I got some very bad indications. For example:
ksoftirqd is a per-cpu kernel thread that runs when the machine is under heavy soft-interrupt load. Soft interrupts are normally serviced on return from a hard interrupt, but it's possible for soft interrupts to be triggered more quickly than they can be serviced. If a soft interrupt is triggered for a second time while soft interrupts are being handled, the ksoftirq daemon is triggered to handle the soft interrupts in process context. If ksoftirqd is taking more than a tiny percentage of CPU time, this indicates the machine is under heavy soft interrupt load.
I have 16 instances of those running all the time, even right after reboot.
In a general, the kblockd kernel threads are responsible for performing low-level disk operations. A high utilization of these could indicate that the server IO queue is backed up and the server is not managing to perform its disk writes quick enough
I have 16 instances of these, but they are not chewing up memory or hogging processor.
For the uninitiated, kondemand is a kernel thread that belongs to the ondemand governor of cpufreq subsystem, which changes the p-states of the system, based on the utilization statistics. Thus it’s something that helps in power management.
Again I have 16 of this - why? And 16 rpciod - something to do with NFS I/O. I do not even use NFS, where it comes from?
I probably could kill instances 3-15 of each, buit they will show up again upon restart, do not they?