top is a Unix/Linux/BSD program to show what processing are running. It can show the top users of CPU or memory.
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votes
4answers
57 views
How can I get combined CPU usage for all CPUs in one line on Linux? [closed]
I want to output the following:
Average CPU utilization across all cores, over the last n seconds, in a single percentage value.
So if I have 4 CPUs and their combined user and system utilization ...
0
votes
1answer
34 views
Many 'yum' processes running constantly
I am getting this output when I run top and trying to work out if it's problematic and why it would be doing this in the first place, all the 'yum' instances seem to always be there:
PID USER ...
-1
votes
3answers
118 views
Is this server using too much RAM or virtual memory ? (screen attached) [closed]
I have a VPS with 512MB of ram 40GB storage 1CPU, I run a small domain parking service on it.
It is on CentOS, MySQL, Apache, etc.
Now my hosting provider claims that my server is putting too much ...
0
votes
1answer
27 views
Does 'top' show memory / CPU usage of parallel processes on cluster?
Recently inherited a neglected cluster: I'm trying to do some sanity checks on it. Running a benchmark on node X and then running 'top' shows high cpu usage from mpi processes (as expected), but on ...
0
votes
0answers
76 views
How to prevent Ubuntu server from hanging due to jbd2/sda2-8 and flush-8 processes
I have an Ubuntu server running Apache, PHP, Memcache. The problem is that the server hangs for a few seconds every minute or so.
Running iotop, I see intense disk activity when the server hangs, due ...
1
vote
4answers
315 views
Find out what high CPU usage apache process is actually doing?
Currently having a few issues with our server where, intermittently, we seem to get apache processes which just run and run, taking up 100% CPU.
When running top, we see the following:
PID USER ...
0
votes
1answer
106 views
CentOS 5: is %wa too high or optimal?
i have question about waiting for HDD. I'm not sure what is optimal %wa.
Server running browser game, i know that there is a lot hdd writing but im not sure what is optimal %wa.
Server running 8 ...
0
votes
1answer
34 views
What is using the memory when e2fsck is running? [duplicate]
I am having trouble running e2fsck due to memory limitations, as detailed in this question. In the course of investigating that, I came upon something that may be of more general interest, so I will ...
0
votes
0answers
35 views
Top shows md127_raid1 with high CPU load?
I have a new server, when I use "top" to see busy processes I usually see
md127_raid1
either at the top or close to the top
What is this process doing? How can I easily verify that the raid is ...
1
vote
2answers
166 views
How to get /proc/[pid]/cmdline to contain command arguments?
I am running into an issue where some of my Ubuntu/Debian servers do not show the arguments passed to rake in either top or ps. I have tracked this problem down to a variation in output given by ...
0
votes
0answers
42 views
why RAM on my server is nearly gone? [duplicate]
I'm totally novice in this field. I bought a virtual server and set it up as I have learned, while had dig a lot of lessons in internet about configure a server.
What i can't understand is the RAM ...
2
votes
2answers
120 views
Linux process swap usage is greater than the overall system swap usage
I have a strange problem that when I run top command it shows that some processes are using around 1.5GB of swap space but then the overall usage of the system swap is way to less to something around ...
0
votes
1answer
111 views
Sum of memory of few processes in top is greater than 100%
I'm trying to calculate the amount of memory used by AMP in an LAMP stack machine.
top -bn1 | grep -E '(mysql|httpd|php)' | awk '{mem += $(NF-2)} END {print mem}'
But the sum generated using the ...
0
votes
1answer
39 views
vsphere + Foglight and running top command does not match
We have a vsphere cluster and we are trying to setup monitoring via Foglight to monitor memory usage at the Guest level.
However, there are inconsistencies in reporting metrics.. most likely due to ...
0
votes
1answer
76 views
Where is my RAM going? Top command included [duplicate]
Possible Duplicate:
How to understand the memory usage and load average in linux server
Tasks: 39 total, 1 running, 37 sleeping, 0 stopped, 1 zombie
Cpu(s): 0.0%us, 0.0%sy, ...
5
votes
1answer
130 views
Identify which process is responsible for heavy disk i/o under FreeBSD
I wonder how I can monitor which process takes out all my IO bandwith.
The only command i know is gstat but it shows cumulative info.
Is there any tools i can use to inspect the running processes for ...
1
vote
1answer
64 views
TIME column in TOP command for mysql
When I run top on my database server I get that mysqld has been running for 4:00.51 and it continues to go up.
I assume this means that one process with mysql has been running this long from other ...
2
votes
0answers
32 views
How to interpret increasing SHR reported by top?
The man page for top defines SHR as:
t: SHR -- Shared Mem size (kb) The amount of shared memory used by a
task. It simply reflects memory that could be potentially shared with
other ...
0
votes
0answers
33 views
Output average CPU usage by COMMAND during the last X minutes of command top
In my top command different processes, various php processes, a lot of httpd processes and a mysql process.
I want to output the average cpu usage of each of those processes and group them by ...
3
votes
2answers
184 views
How to get top command output to show rake arguments?
In the past, all of our servers have automatically shown command arguments passed to rake when we view them in top. For example:
But on this particular server, we get this instead (picture is top ...
0
votes
1answer
52 views
Linux released memory
If My process allocates some big memory and then deallocates, would top or gnome-system-monitor show that my memory usage of that process decreased ? or kernel will still reserve that memory for that ...
2
votes
2answers
79 views
Linux: Finding the system processes which are at the top
I am running a multithreaded program on my 8-core processor. top command shows 8 processes are running and each one utilizes a core by 100%. The problem is that only 21% are marked as user cpu and my ...
0
votes
2answers
125 views
0% CPU in top for all processes, but load average > 1
On two different servers (with Ubuntu 12.04LTS AMD64) I have seen the following behaviour:
op - 10:50:05 up 305 days, 21:17, 1 user, load average: 1.94, 2.52, 2.97
Tasks: 141 total, 2 running, ...
1
vote
1answer
131 views
Live monitoring on web server logs by tailing the webserver access log
I am looking for a way to find who causes high load on my nginx web server but I do have too many requests per minutes to figure it out which one is the real cause.
I want a solution that would work ...
0
votes
0answers
103 views
Why is ipconfig in Linux top output?
top - 11:55:55 up 9 min, 5 users, load average: 1.30, 1.55, 1.00
Tasks: 229 total, 2 running, 227 sleeping, 0 stopped, 0 zombie
Cpu(s): 12.6%us, 41.0%sy, 0.1%ni, 31.0%id, 12.9%wa, 0.0%hi, ...
-1
votes
3answers
101 views
How to solve memory issues in Linux
How to get details of a process that is taking RAM.
From top command i have found that Mysql is taking too much ram how can i know why Mysql is taking too much ram far from usual behavior?
Is there ...
3
votes
1answer
80 views
How do you measure the memory footprint of a set of forked processes?
Say I've got a process using 200MB of memory, and it fork()s:
python -c "import os; data='x'*200000000; os.fork(); raw_input()"
Programs like 'top' will show each process using 200MB, with very ...
0
votes
1answer
57 views
how can I tell if there is a cpu trashing on my linux machine
I want to write a script that will kill my processes when my machine is doing "too much" swapping of process memory from disk to memory.
What is the best way to determine that? I saw top has %wa and ...
2
votes
2answers
209 views
Monitor CPU usage over period of time on Ubuntu
Is there some way to monitor my CPU usage over a period of time, e.g. get a graph that shows CPU% vs. date/time? I occasionally see high load using htop, but I'd like to see what's happening ...
0
votes
1answer
191 views
Top showing 64% idle on first screen or batch run, while there is no idle time at all
I'm running a quite heavy number crunching thing on a few 4 core servers, all running Ubuntu Precise Pangolin LTS 64 bit, in the cloud (so I suppose in a virtualized environment).
To monitor the cpu ...
3
votes
1answer
360 views
top process state column under FreeBSD
When running top interactively, I can see various words in the state column :
nanslp, biord, select, uwait, lockf, pause, kqread, piperd, sbwait ...
Some like nanslp or kqread are self ...
2
votes
2answers
92 views
How to show high usage user's username with the top command, if the username is too long?
I'm having problem identifying high usage users on a shared Linux machine.
I use the "top" command and it does show which commands are using the most CPU.
But the usernames on this server all start ...
1
vote
1answer
80 views
ps -o pcpu on Debian Squeeze is giving meaningless numbers
I'm trying to get the CPU percentage for processes on a busy server out of ps, but it's giving me nonsensical numbers. Here's a truncated example:
$ ps -eo pcpu,pid | sort -n
%CPU PID
...
36.5 ...
1
vote
4answers
154 views
Is there any tool that I can use to monitor memory usage of each process on Linux easily?
This issue is not the same as the question on how to see the memory usage of a Linux process.
Also, the top command doesn't give the exact memory used, but just what percentage one process uses, so ...
4
votes
1answer
148 views
How to read `top`. Process list says processes have swap but overview says no swap is being used
I am using top to monitor my server. The swap row reads
Swap: 1044220k total, 0k used, 1044220k free, 148544k cached
I have hit O p to sort by swap.
PID USER PR NI VIRT RES ...
0
votes
0answers
36 views
Long php-cgi runtime under mod_fcgid ok?
When I look at top in linux bash shell, sometimes I notice long running php-cgi processes. Is this ok? (I am running php with mod_fcgid.) I thought that php processes should be a few hundres ...
4
votes
1answer
447 views
Why does top report a different cpu usage than CloudWatch?
top shows an average CPU usage during peak times of about 20% while CloudWatch monitoring shows an average CPU usage of 40%. What causes this discrepancy?
1
vote
1answer
200 views
Linux top not tallying with java used memory
We have a java application where towards the last part of the codes we wrote these lines
Runtime runtime = Runtime.getRuntime();
long memory = runtime.totalMemory() - runtime.freeMemory();
...
5
votes
2answers
422 views
Load Average above 20 for single core vps on debian
OS: Debian 6.0 RAM:3072 M, CPU:single core.
top:
top - 08:56:43 up 21 days, 12:37, 1 user, load average: 28.38, 22.48, 15.95
Tasks: 8 total, 1 running, 7 sleeping, 0 stopped, 0 zombie
...
1
vote
1answer
256 views
free -m is showing total of 309 Mb for a system with 4GB RAM
OS:Xen Cloud Platform 1.1 (XCP) modified centos, and xen server 5.0 running on intel i5
free -m
total used free shared buffers cached
Mem: 309 ...
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votes
2answers
333 views
Load Average too high.Top not showing much?How to find the process?
Debian 6.0 running on VPS with single core and 3 Gb RAM.
top - 09:24:19 up 17 days, 13:05, 2 users, load average: 14.79, 16.19, 11.10
Tasks: 14 total, 1 running, 13 sleeping, 0 stopped, 0 ...
1
vote
1answer
76 views
How to determine httpd memory usage
If I have this output from top for httpd, how do I determine its total memory usage?
16924 apache 20 0 203m 7108 2852 S 0.0 0.2 0:03.48 httpd ...
0
votes
1answer
236 views
load-causing processes disappearing from “top” ps -o pcpu shows bogus numbers
I administer a large number of servers, and I have this problem only with Ubuntu 10.04 LTS:
I run a server under normal load (say load average 3.0 on an 8-core server). The "top" command shows ...
1
vote
3answers
766 views
No apparent reason for high load average
We have several web servers running on Amazon (ec2) c1.xlarge, over Amazon AMI.
The servers are duplicates of each other, running the exact same hardware and software.
Each server spec is:
7 GB of ...
0
votes
1answer
545 views
How to get Network Data Received and Data Sent Information on Mac OS X?
I want to store the network data received and data sent information on a variable or in a file.
Using the below command I can grep it and print the line on screen. But I'm not able to store the info ...
1
vote
2answers
308 views
No clue for high load average on top
We have several machines on Amazon (ec2) of the type c1.xlarge with 16 cpus, running the Amazon AMI.
Details on the machine:
7 GB of memory
20 EC2 Compute Units (8 virtual cores with 2.5 EC2 Compute ...
2
votes
2answers
651 views
Why does ec2 monitoring show 100% cpu and top only 20%?
I am running an python script on an ec2 instance that inserts rows in an database on another instance. In ec2's monitoring I saw a 100% cpu utilization, whereas top only shows 20% for the python ...
0
votes
2answers
410 views
load average in top and procs in vmstat
As far as I know, the load average in top is the numbers of precess(threads) in running or uninterrupted sleep status, So it should be equal to (procs-r +1 )+ procs-b in vmstat, but in practice, this ...
1
vote
2answers
181 views
Solaris: what's a kernel trap?
I'm trying to understand whether the high trap count reported by top on Solaris 10
Kernel: 1659 ctxsw, 1069 trap, 4433 intr, 3837 syscall, 5 fork
Memory: 8192M phys mem, 299M free mem, 4103M total ...
2
votes
3answers
539 views
Diagnosing high CPU waiting
I have a monitoring server that is running icinga/collectd/graphite with about 50 hosts. I have noticed high load/slugging performance on the box. If you take a look at top, you'll see:
Cpu(s): ...
