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Questions tagged [load]

The tag has no usage guidance.

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12 views

How to find max queue length for device?

Recently I ran into some I/O overload problrms on some of our machines and I have been searching to find thresholds for some metrics like: avgqu-sz await svctm Then I saw this post on Stack ...
1
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0answers
23 views

How to get CPU “load” of subset of CPU cores?

In my environment, each job is assigned (cpuset) to a subset of CPU cores, almost exclusively. (Actually, it's done by Slurm.) Since the CPU core occupation is exclusive, can I get/calculate the 1-...
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0answers
29 views

mount: filesystem mounted but any subsystem operation failed: no such file or directory. — on OS load

My distro is ALt Linux with KDE5. I've got the following error on OS load just before the login screen: mount: filesystem was mounted but any subsystem operation failed: no such file or ...
0
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1answer
26 views

How to measure the usage of disk cache?

Load Average itself is not very informative about the reasons of overload, so I want an additional characteristic: the percent of disk read operations that are done from cache. To measure it, I ...
-1
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1answer
106 views

what are the executable ELF files respectively for static linker, dynamic linker, loader and dynamic loader?

In Linux, what are the executable ELF files respectively for static linker dynamic linker loader dynamic loader? Which of them are invoked by execve() by dlopen()? How are they invoked by execve(...
4
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1answer
261 views

Why does tar have a low CPU usage but high system load?

I'm using tar to backup my server once every day. Even though CPU usage (of the tar command and the system overall) doesn't go over 10%, my system load is like 3.98 3.71 3.82 when the script is ...
0
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1answer
333 views

Data getting overwritten with same timestamp in InfluxDB

There are some data in a csv file and it is getting overwritten if the timestamp is similar, for example: ip,time,name 1.1.1.1,2018-08-31 11:12:32,python 1.2.1.2,2018-08-31 11:05:28,oracle 1.3.1.3,...
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0answers
133 views

Why does iotop not show some processes with high disk IO? And what tool will?

My disks are being read from at their maximum rates, but iotop shows nothing accessing the disks except a few blips here and there. I've tried iotop -o and -ao and barely anything is accessing disk. ...
1
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1answer
100 views

Why is my Fedora Linux system swapping like crazy? [closed]

Every few days, at differing times my system starts swapping like crazy and the load goes extremely high such that the system is very slow to respond. Sometimes I have waited 4 hours for it to recover,...
0
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1answer
262 views

Is ld.so an executable?

$ file /lib/ld-linux.so.2 /lib/ld-linux.so.2: symbolic link to i386-linux-gnu/ld-2.27.so $ readlink -f /lib/ld-linux.so.2 /lib/i386-linux-gnu/ld-2.27.so $ file /lib/i386-linux-gnu/ld-2.27.so /lib/i386-...
0
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1answer
119 views

High load on i5 with no visible reason

This has been reported as a bug to Debian. I have an i5 with high avg. load as shown in top, which for an idle system (with just sshd and 2 sessions) stays around 2.00 all the time. The machine hosts ...
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0answers
32 views

Does nice allow me to prevent important processes from being slowed down?

I have two jobs I'd like to execute on a system with 88 threads. One job is set to use 72 threads (one thread each process). It's usage is pretty constant. Another will dynamically go up to 88 (one ...
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0answers
91 views

Directory size causing cpu load

I am monitoring several high volume directory using Zabbix. I used du command. I need to monitor in every 60sec. But problem is that Zabbix firing du command in every 60sec. it does not check whether ...
0
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2answers
696 views

How to get process load avg without tools

I want to list processes and their info in my program. The most information I can get from /proc/[pid]. How does top, htop etc get the average load of a process?
2
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0answers
279 views

CPU high load native_queued_spin_lock

I'm using Debian 9(stretch edition) kernel 4.9., hp dl385 g7 server with 32 cpu cores. NIC queues are tied to processor cores. Server is shaping traffic (iproute2 and htb discipline + skbinfo + ipset +...
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0answers
448 views

How to find concurrent number of connections per second with Apache?

A web-server hosting an application for a client ; which is high-volume or transaction server, it is required to find out "number of concurrent connections" currently in use by the server. This is ...
1
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1answer
48 views

System unresponsible - extreme load

Today my server became unresponsible I could not even log in to ssh, but as I am running my own server app on it I was able to recover a "top" data. Server was running but was not accepting any new ...
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0answers
45 views

Load > 2, does it matter?

I see the following load on one of our servers load average: 2.08, 2.09, 2.03 Is it too much and should be handled or can I just leave it? The server is a backup server with no direct usage, it ...
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0answers
121 views

Figuring out why the load average spiked at a given point in time

I rented a VPS a month ago, which I use to run a couple of web services behind a reverse proxy (JIRA, Confluence and gitlab), and I'm basically the only user of these services. During this month ...
3
votes
1answer
291 views

cgroups CPU quota vs system load metric

I'm wondering about if and how cgroups affects system load metric. Let's assume I'm running CPU-heavy process within cgroups with config: cpu.cfs_quota_us = 50000 cpu.cfs_period_us = 100000 So ...
1
vote
1answer
1k views

finding the root of high CPU load

The output of top command shows that CPU load is about 82!. The system has 32 cores. Normally, each core increment the load by one. How can I find out what is exactly happening? top - 11:20:43 up 88 ...
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0answers
534 views

Reducing Load On Server

I am having the strangest of issues with a cPanel server. Basically the server is using very little CPU and Memory in comparisson to what it has available but still the server's load keeps driving up ...
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0answers
52 views

multiple directories for sar command

Is it normal for below directories created by sar command -rw-r--r-- 1 root root 348948 Nov 3 23:50 sa03 -rw-r--r-- 1 root root 348757 Nov 3 23:53 sar03 -rw-r--r-- 1 root root 348948 Nov 4 23:50 ...
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0answers
465 views

Creating CPU/GPU/Memory load average history

In our research group we are running a computing server for deep learning with a number of NVIDIA Titan X graphics cards and quite some CPU cores. Given that it is a research lab and we have ~10 ...
5
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3answers
928 views

atd, batch // Setting the load limiting factor

I am launching non interactive jobs using batch, and I would like to increase the load limiting factor in order to use all 8 of my cores. I am on Ubuntu 16.04 LTS. From what I understand, batch uses ...
2
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1answer
36 views

What should I consider when deciding how many processes to run on an application host? [closed]

I work in operations, and as such am the primary decision maker for some deployments of our services. I work with a distributed application that involves several types of "services", some more ...
2
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2answers
41 views

Proper way distribute several scientific experiments across multiple servers?

In case I have 8 powerful machines, what is the proper way to distribute and balance the load from user applications and scientific experiments? Is virtualization right way to go, or is there any ...
4
votes
1answer
619 views

How to increase server load?

I am attempting to stress a server as much as I can before it goes into production. I’m using Jmeter and have been able to add a little more stress by modifying scripts. I’ve also modified JVM ...
2
votes
1answer
395 views

How to troubleshoot high load when kernel module is suspect?

I have noticed a bug with Ubuntu 14.04.4 LTS; if the NFS client loses connection to the NFS server the load on that system will spike to upwards of 30. The only way I've noticed to bring the load ...
1
vote
1answer
206 views

Is it possible to allocate RAM for all the code and data in an ELF file during loading?

I know that, in Linux, a page of RAM will not be allocated for a page of virtual address space until a virtual address in the page is referenced. However, I'm using embedded Linux in a device where ...
0
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2answers
346 views

System Load averages

As a disclaimer, I have read related question to this topic, but still a bit confused in regards to the situation I am seeing. Understanding system load and also: Understanding top and load average ...
0
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2answers
408 views

Loading & booting MINT from external SSD?

Linux Mint 17.3 Cinnamon-- I wish to load this on my old VAIO (64Mb/s, 8G RAM). I'm using WIN 8.1; however, I have a blank SSD that I'd like to boot Mint on-- soooooo, what do I do? I tried ...
8
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1answer
22k views

How to debug causes of excessive ksoftirqd resource usage?

man ksoftirqd indicates that: If ksoftirqd is taking more than a tiny percentage of CPU time, this indicates the machine is under heavy soft interrupt load. I'm working with a Debian Wheezy ...
2
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1answer
617 views

Python processes appearing and disappearing in top

I concurrently launched around 12 Python scripts on a 24-core server (Ubuntu 14.04 LTS x64). Each of Python script takes around one hour to complete. I see in top that they appear quite sporadically, ...
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0answers
21 views

blackscreen without backlight load

I have samsung np535u4c notebook with amd dual graphics. And my manjaro (arch based) randomly load on two state: normal & black screen without backlight. How to fix that? free amd drivers on board
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2answers
275 views

Analyse high load root cause

This is a cents 5.7 32bit VM running inside a vmware 5.5. host. I see high values of load average with low CPU usage. The VM has 4 vCPU’s and load sometimes reach 20. When I run vmstat I see high ...
8
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1answer
4k views

SSH server always available under heavy load

Is there a way my SSH server, and everything under it (including bash) can be always available under heavy load ? Maybe it could be some kind of a critical path, all in memory, with a dedicated CPU ...
0
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1answer
1k views

NAS: 100% system (kernel) cpu usage

I have a single core NAS My Live Duo. It runs Debian lenny release. I found via htop utility that it constantly use 100% of red cpu without any noticeable process to eat it. Than I checked via iostat ...
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0answers
312 views

My load is high. Top is strange. IOStats show low load

Load is high. This is my top top - 04:08:52 up 15 days, 15:14, 1 user, load average: 99.09, 107.09, 117.35 Tasks: 998 total, 125 running, 827 sleeping, 1 stopped, 45 zombie Cpu(s): 13.4%us, 75....
2
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2answers
449 views

Current disk load

I'm using iostat to get the current disk load each second with iostat -dx 1 (specially, %util column). However, I'd like to put this in a bash script and control the interval with the watch command ...
5
votes
1answer
1k views

High %sy in top output, how to debug?

We have 2 identically configured servers and one of them is showing a high %sy while the other does not. This would seem to indicate that the system is busy doing something. Cpu(s): 28.1%us, 66.3%sy,...
0
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0answers
381 views

CPU load and power management (frequency)

question background In my understanding the load value (shown e.g. by top) allows (together with the knowledge how many CPU cores the system has) a very quick assessment which share of the ...
2
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1answer
788 views

Why is Linux load average reported as the exponential moving average? [duplicate]

Why is the Linux load average over the past 1, 5 and 15 minutes reported as the exponential moving average, instead of just simple (unweighted mean) moving average? It seems to me that the simple ...
1
vote
1answer
1k views

top/ps/mpstat showing different output

When my top shows a load of 19/20 and my ps shows root@server:/home/nohup# ps -eo pcpu,pid,user,args | sort -k 1 -r | head -5 %CPU PID USER COMMAND 122131 18695 mysql /usr/sbin/mysqld xxxxx 0....
13
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1answer
44k views

Very high CPU load, but nothing significant in top [duplicate]

I'm running Ubuntu Linux 12.04.1, with VirtualMin 4.08.gpl GPL and 2 CPU cores. Pretty much all the time for the last few weeks, it's been running at well above load average of 5, usually up closer ...
1
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2answers
8k views

How can average run queue length be 1 but load average is almost zero

(I originally posted this on Stack Overflow - advised to move it to here). On fedora 17 when i run the sar command to view the load average activity it almost always shows a run queue length of 1 ...
1
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3answers
914 views

Apache: Simulate 100 new connections per sec with ab

I know I can use "-c" switch in ab to simulate a certain number of concurrent connections. Is there a way in which I could use "ab" to simulate 100 new clients every second visiting my website or ...
3
votes
1answer
429 views

Load application with module load and specify a different name from the default [closed]

I am using my local workstation to run applications stored on our local cluster. To load and run an application, I normally use: module load xxx However, there is a an application on my computer ...
19
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3answers
11k views

Why load is high despite the fact that neither CPU or disk is overused

I'm getting the following output from top: Cpu(s): 43.8%us, 32.5%sy, 4.8%ni, 2.0%id, 15.6%wa, 0.2%hi, 1.2%si, 0.0%st Mem: 16331504k total, 15759412k used, 572092k free, 4575980k buffers Swap:...
1
vote
1answer
50 views

Is there a way to monitor the Shareable Objects (.so) loaded on launch of a specific application?

I've been through dependency issues, but, finally, have my application running. The problem is I need to force install of some old libraries with dpkg to achieve this, which, in turn, breaks my ...