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Questions tagged [dmesg]

57 questions
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High load average, but low CPU/IO figures - how to diagnose? (dmesg output included)

We have a Hadoop cluster where arbitrary data nodes will lock up. This is usually pre-ceded by ever-increasing load averages, with CPU and IOwait remaining practically non-existant. The use case for the machines affected is high-IO hadoop data nodes…
David Corley
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"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message

One of my server (Ubuntu 12.04, 16CPU, 32GB RAM) runs the app section of my website (Nginx 1.1.19, PHP5-FPM, Php 5.3.10, Symfony2 Web Framework) Suddenly, users started getting HTTP 5** Errors. When I went on the server, there was huge disk IO and…
user268083
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I/O Errors but no smart or ZFS errors

I'm having trouble to identify a problem for a friend of my. He is running ZFS on Linux with the Debian distribution. We are getting these entries into the dmesg. [273044.834151] mpt2sas0: log_info(0x31110d00): originator(PL), code(0x11),…
drsect0r
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nf_conntrack complaints in dmesg

While investigating complains on bad HTTP server performance, I've discovered these lines in dmesg of my Xen XCP host that contains a guest OS with said server: [11458852.811070] net_ratelimit: 321 callbacks suppressed [11458852.811075]…
Alexander Gladysh
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Is segfault signal always sent to application

My application usually crashes and prints stack to log if received segfault signal. But in some environment the 'dmesg' shows segfault messages related to my application, but application uptime is much older. Can segfault be suppressed and…
noonex
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php5-fpm invoked oom-killer

One of my server (Ubuntu 12.04, 16CPU, 32GB RAM) runs the app section of my website (Nginx 1.1.19, PHP5-FPM, Php 5.3.10, Symfony2 Web Framework) Suddenly, users started getting HTTP 5** Errors. When I went on the server, there was huge disk IO and…
user268083
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2 answers

How do I find out my CD ROM hardware specifics on FreeBSD?

I can usually use dmesg soon after bootup to display hardware info that my kernel loads. After my system has been up for a while however, dmesg no longer produces anything of value concerning hardware. How can I find out my hardware specifics, such…
EhevuTov
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What are these strange entries in dmesg?

Running Ubuntu Linux 9.04, and I see these odd log lines in dmesg: [ 18.673752] type=1505 audit(1240159967.221:2): operation="profile_load" name="/usr/share/gdm/guest-session/Xsession" name2="default" pid=2197 [ 18.730952] type=1505…
jldugger
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Monitoring dmesg output

I find that when something goes wrong at a low level on one of my linux servers, I can see messages about it in the kernel ring buffer. These can be viewed from the command line using the dmesg command. I am wondering if there is an easy way to get…
Brent
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Dmesg and cpuinfo MHz differencies

I can see different values of CPU MHz here: cat /proc/cpuinfo model name : Intel(R) Xeon(R) CPU E3110 @ 3.00GHz stepping : 6 cpu MHz : 2000.000 Model say 3GHz and cpu MHz say 2GHz but dmesg | grep MHz say CPU0:…
kamoks
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how to identify kernel problems from message log file

dear friends and colleges we notice about unexpected freezed of one of our critical linux machines server linux - version - 7.2 this is VM machines and now I am working to understand what the root cause that server was freezed from the messages log…
shalom
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How should I disable application logs into syslog?

I have many services that floods syslog file in /var/log with tons of messages. Sometime server restart all of a sudden and when I created a ticket about the issue, they said that the problem is related to the heavy use of the emulated serial port.…
Alireza
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server large jiffies during boot(Calibrating delay loop...)

The server behaves abnormal, I checked the dmesg log , found the jiffies is very large during boot, between Detected cpu and Calibrating delay loop.. reboot the server does not solve the problem. shutdown and cool down for a while then restart it…
user319514
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wired dmesg output and high cpu load

I have like 50 Linux servers with the same hardware and kernel, but recently found that some of them suffers from high CPU load, runs very slowly, top and ps show TIME column with impossible large numbers; ps aux output with many 99% CPU. the kernel…
user319514
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Radeon DVI errors filling logs

These error just fill my logs: [316094.848311] [drm:radeon_dvi_detect] *ERROR* DVI-I-1: probed a monitor but no|invalid EDID [316104.895726] [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 128 [316104.898492] Raw…
Frank Barcenas
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