General :: %CPU Too High For Process?
Mar 4, 2011
I am using centos 5, Kernel 2.6.18-53.el5. I am using 2 quad core processor with 4gb of ram
I am trying to figure out the significance of %CPU in the ps command.
My astreisk process %CPU is very high at the moment, at 115. I want to know if it is a cause for concern? If I do a top then the load of the box is very low.
Code:
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 2872 115 1.4 628664 58372 ? Sl 14:56 190:30 /usr/sbin/asterisk -f -vvvg -c
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Jun 30, 2011
Is there any program to terminate process automatically if using more than 90% or 100% CPU time for more than 5 seconds? I have a program that opens a web browser, do some stuff on it and close it. But problem is that sometimes that browser starts using 100% CPU
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Jan 8, 2010
one tell me the internal working of kill command. that is how it kills a process internally or from where it picks file to continue its process.
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Jan 21, 2011
I have a high priority service that I start with sudo nice -n -10 process. This process does not need superuser rights though, except for the priority elevation. But nice requires superuser privileges to elevate priority.
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Jun 12, 2010
send the details raid configuration how to use in linux el5 and how to indentify the raid degrade process and how to rebuilt the process.
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Sep 8, 2010
Code:
#include <stdio.h>
#include <unistd.h>
#include <signal.h>
[code]....
Description of what the code does or what i intended to do:
1. Created a child process from parent process using 'fork()'
2. Sent a signal 'SIGALRM' from child process to parent process using 'sigqueue' function.
(The Third parameter of 'siqueue' function contains the message (message msg) which the child process wants to send to the parent process.'msg' is a stucture instance containing a) pid of child and b) string) 5. Print the 'msg' sent by child process inside the signal handler function 'sig_action_function' of the parent process I am getting some junk value when this line is executed
Code:
printf("%d
",msg->cpid);
I expected to get the pid of child process, which the child process sent to parent process through the signal.
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Aug 12, 2010
as we all know Process Scheduler does Process scheduling and its a process as well. I was just wondering that if this happens then the Process "Process Scheduler" should be a part of Process queue as well.
So if there are 5 process are there in Process queue & process scheduler is administrating them then since its also a process, once it puts a process under RUN state it should itself go inside queue because at one instant only one process can get executed on a processor. This is quite confusing for me. Please help me out. I tried to search on this but could not find any relevant topics.
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May 4, 2010
How do you find the parent process of zombie processes?
When the child process is something where the parent is not entirely obvious...
Is there some way to list processes in tree format or something?
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Nov 9, 2010
I have a process running on Linux.When i do ps -eaf | grep <myProcess>, it show muliple entries for <myProcess> with different pids for each entry.Kindly tell me what could be the reason for a process having multiple pids?
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Mar 23, 2010
I want ro ran new commandy after sungrid finish his task.Exp:qsub -q bla command1; command2 command2 start only when job of command1 finished.
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Nov 16, 2010
I've been running my shellscript for about half an hour now. It's taking longer than I thought to process all the data. I have the process ID of it. Is it possible to save the process and log out then log in and continue the process? I know how to pause a process using kill -pause pID and continue it using kill -cont pID. But that only work if you don't log out after pausing it.
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Mar 10, 2011
I want to kill parent process after "fork()" method. but if I kill parent process with "exit(0)" method, main() thread is terminated as well so child prosess doesn't work anymore. Is there any way to kill only parent process without affecting to child process?
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
[code]....
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Jun 8, 2011
what is High Performance computing and its uses.
what is active active and passive passive cluster ?
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Aug 10, 2011
I wrote a script to extract and get the the name of *.gz in a foler . Since running that script every 10 minutes, load average on my server increases more than 10.I checked with 'top' and it showed many D process.
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Jul 1, 2010
Is this just a standard characteristic of Linux or is there some way I can EQ all the audio? I've had nothing but problems with audio sounding like a scratched record in Linux. It would skip, crackle and break up no matter the source or volume. Found a solution that one to simply remove PulseAudio.
I'm using Altec Lansing ADA885 speakers with 8" DVC subwoofer. System response is good down to ~28Hz but it sounds like a cheap boombox. Last time I had these hooked up to a Windows (XP Pro) system, the bass was deep and full. Very audible all the way down. Now it sounds like the audio is boosted at center frequencies and overly cut on high and low end.I even tried putting in a PCI Turtle Beach Santa Cruz 5.1 card and the sound did NOT improve.
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Nov 11, 2009
I have a server running samba process and there are about 70 samba users connected at a time. The system has 4Gb of memory and it seems each samba process is utilizing only 3352Kb of memory.
When I run the command
pmap -d (pid of samba)
It gives as:
b7ffa000 4 rw-s- 0000000000000000 0fd:00003 messages.tdb
bfe46000 1768 rw--- 00000000bfe46000 000:00000 [ stack ]
ffffe000 4 r-x-- 0000000000000000 000:00000 [ anon ]
mapped: 33384K writeable/private: 3352K shared: 20504K
But when I run the top command, it results as below:
Tasks: 163 total, 1 running, 162 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.9% us, 4.9% sy, 0.0% ni, 93.3% id, 0.8% wa, 0.2% hi, 0.0% si
Mem: 3895444k total, 3163192k used, 732252k free, 352344k buffers
Swap: 2097144k total, 208k used, 2096936k free, 2487636k cached
Why could the system be utilizing such high memory? By the way, the server is not running other processes. The samba version running in it is 3.0.33-0.17.
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Jan 4, 2009
I just built my first computer from the ground up and installed linux x86_64, FC10, and among other problems, i cannot get the volume of my speakers to play much above a low volume. i have the pulseaudio volume control set to 100% for the output and input levels. i adjust all my video and audio players volumes to the max also, but the volume from the speakers is still very low. the speakers worked fine with my old hp computer. is there anything i can do, adjust to fix this?
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Nov 14, 2010
During downloads, the top command shows the Firefox process at 100% CPU. Yesterday I tried to download an .iso image. After a few hours the Firefox window would not refresh nor would it respond to input. I tried the wget command. It used negligible CPU time and completed in 28 minutes.
This problem is easy to reproduce because it happens every time I download a file in Firefox. It also happens when I use a fresh profile to run Firefox without any extensions or plugins.
This is Firefox 3.6.12 on Fedora 14.
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Sep 2, 2010
I am working on Ubuntu 8.04.3 OS, with this I am getting a problem, Daily my server is down on same time at 4:00 PM. I seems server is down by "kswapd0" process, I am not sure, As I run top command, I got below out put
[code]...
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Feb 10, 2010
I have High load on my server and my investigation shows nothing (so i believe that my investigations is wrong ), the load average in this moment is 10.13, 9.47, 8.24. , mentioning the below.
- The disk utilization (all the disks) is near 0, as the result of the IOSTAT
- There is no blocked processes (as a result of VMSTAT).
- I have two processors (dual core) , the maximum load average should be something around 4.
- The server always have above 8 load average in all times interval.
btw , my OS is RHEL AS release 4 (Nahant Update 7)Kernel :Linux 2.6.9-78.ELhugemem #1 SMP i686 i686 i386 GNU/Linux
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Mar 2, 2011
ubuntu 10.10 with broadcom wireless adapter when i make ping on google i got: time=2000 ms i tested on another computer i got 350 what the problem?
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Jan 5, 2010
I've been having a problem in Ubuntu 9.10 recently where starting about 2 minutes after startup my computer slows down and becomes unresponsive. I believe the problem is associated with a high IOWait because I have the system monitor applet on my Gnome Panel and it displays 100% IOWait every time my system starts to slow down. I have tried booting into other kernel version and the problem persists. I don't really know what IOWait is or how to diagnose this problem further. I've looked around online and it seems like you have to find a specific process that is causing the IOWait, but I don't understand how to go about doing that.
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Dec 29, 2010
Just trying to figure out some stuff with a broken process. A java app seems to sometime get stuck on a loop or something and i'm trying to find out what's causing it using just the following #sysadmin tools at my disposal.
Things like:- htop - find the PID thats causing the High CPU cycles. I'd then want to use /proc/[PID] or lsof -p [PID] or strace [PID] etc. But the PID doesn't exist in 'ps -ef' output so I think htop must be showing me kernel level thread PIDs?
Not sure about the PID's HTOP is actually giving me? I know that some of them are the real PID's that can be accessed through /proc/[pid] etc but others are not but are i assume child processes or more likely threads as child processes are normally shown in a default ps output anyway.
Is someone able to help distinguish to me about what exactly all these other PID's are that I can't manipulate or find apart from when using HTOP.
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Nov 11, 2010
I've some file with .sh extensions that runs some softwares.Now,how do I stop running that filesI know we run the command ./start_tomcat.sh to start the apache.Is there any command to stop that file/process or is it just kill the process to stop the process
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Dec 6, 2010
I want to use 1920x1080 in the virtual consoles, with:
Debian Squeeze; proprierary ATI drivers.
Switching back to the open source drivers, it works automatically, but I got no clue with these ones. Someone say I should use uvesafb by modifing initramfs accordingly.
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May 18, 2011
We have a 32bit Gui application created using C++. We ported the application from Solaris to Linux. Issue we are facing is the size of the library and executable is very large in LINUX compared to Solaris. Red Hat Enterprise Linux 5.4 is the Linux version we using. Please find a sample dynamic library created. We would like to know the following behavior of LINUX is normal or not. Consider we created two files test1.cc and test2.cc. Both having a single line of code.
[Code]....
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Jan 28, 2010
I'm not all that familiar with what it is that the expensive SATA cards do, other than providing on-board cache and many ports, but all things considered what can't a CPU and lot's-o-RAM do that an expensive SATA card can?This assumes, of course, that you weren't planning on using the CPU to run other applications (i.e. a SAN type setup).
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Oct 31, 2010
After changing servers and moving things around, I have one system which serves the /home directories, and for some reason, it is extremely slow. I've looked for duplicate IPs, signs of a HW problem, etc. and cannot figure out why the system is running with a high load, high iowaits, and low responsiveness. The servers and clients are slackware 12.2 and 13.1 respectively.
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Apr 10, 2011
After installing reddit, my ubuntu stuck with high cpu usage and system load.
Code:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
8634 reddit 20 0 12180 8960 2572 R 12.1 0.9 0:00.51 paster
8611 root 20 0 23756 17m 3816 R 11.8 1.7 0:00.99 paster
8613 reddit 20 0 23200 17m 3908 R 11.8 1.7 0:00.96 paster
8617 reddit 20 0 15072 11m 2688 R 11.8 1.1 0:00.69 paster
8620 reddit 20 0 14372 10m 2680 R 11.8 1.1 0:00.66 paster
[Code]...
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Sep 17, 2010
I need a command to get the process name by process id.
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