Questions tagged [load-average]

In UNIX family Operating Systems, the load average represents the average system load over a period of time.

Filter by
Sorted by
Tagged with
2
votes
0answers
90 views

Process blocking or disk corruption? Very high load + wait times, but low CPU/memory use

I am using a vServer that is suddenly experiencing very high wait times (10/20/30 seconds) or even timeouts on basic requests since yesterday after being in use for over a year without any problems. ...
0
votes
0answers
40 views

Ubuntu 18.04 High Load average, idle cpu, no swapping, no io and no uninterruptible sleep processes

Yet another issue about load average, but I believe this is not explained anywhere else. I've got the following machine with an abnormally high load average: Intel(R) Core(TM) i7-7700 CPU @ 3.60GHz ...
0
votes
1answer
77 views

mysql server with high CPU usage on low loads

On a mysql server with fairly low load, I can see my mysql process using 150% CPU on htop and the system load around 1.5 at all times - sometimes spiking well over 2 The VM has 8 cores assigned to it ...
0
votes
0answers
18 views

Is High Load Average always bad? [duplicate]

I am running a load test on postgres-xl (distributed Postgres). The CPU numbers remain in the 60%-80% range throughout the test. There are 8 cores on the CPU and during the entire test the load ...
0
votes
1answer
202 views

iowait Bound Server - Load Calculations & Process Scheduling

I have a script I'm writing that runs badblocks against a disk shelf full of drives and I'm trying to understand the server load that develops and at what point the server load is critical in this ...
0
votes
0answers
36 views

ram access and load on linux

We face to processes performance issues and usual indicators ( cpu usage, load average, used memory, io wait, page fault) do not show any bottle neck. The processes access highly to RAM, I wonder if ...
0
votes
0answers
60 views

Server is going down frequently (CPU 100% usage & load average over 3.5 mostly)

PHP Application hosted on Nginx server going down frequently. I checked using htop output and cpu usage is 100% and load average is more the 3. I tried restarting server and well as restarting PHP -...
1
vote
1answer
533 views

What is the relation between IO wait utilisation and load average

Load average uses processes that are running or runnable or in uninterrupted sleep state. So do the processes in uninterrupted sleep state correspond with the %wa as per the top command? Both are ...
0
votes
2answers
111 views

How to tune linux machine in order to improve CPU load average and CPU utilization

We are working with huge hadoop cluster. We have 736 datanode machines and each node have 16 core X 2 thread. On some machines we saw CPU load average (98-128 for 5 min). After deeply ...
5
votes
1answer
3k views

High load average but low CPU usage and disk I/O [duplicate]

I’m encountering a strange issue on one of my servers. This is on a KVM VPS which has one dedicated CPU core. Sometimes the load spikes to around 2.0: However, CPU usage doesn’t actually increase ...
0
votes
0answers
72 views

High wa but no IO usage

My VPS is having extremely high wa (around 90), but there is no IO usage taking place. htop: iotop: nethogs: What can be the problem here?
0
votes
2answers
249 views

Can a high load on a VPS be caused by the underlying infrastructure?

My VPS started to have random stints of high load (around 2-3, but the system becomes extremely slow, running ls takes like 30 seconds). I hadn’t changed anything on it, there was pretty much nothing ...
0
votes
1answer
181 views

System load on OpenVZ hardware node - is it reliable?

I discovered something that surprised me. On OpenVZ hardware node there is a big load, let's say the load is 210 (it have many CPU cores available but 210 is still high as for this server). But the ...
2
votes
1answer
121 views

Is load average affected by lack of memory?

I've read several articles about load average and all explained that the load average is the amount of processes in running/waiting to run state on CPU , so it's actually the CPU's run queue + the ...
0
votes
1answer
186 views

cifs/nfs server down , Client server high load average

I have an backup server in my AWS network. For maintenance i rebooted the server, after which it is not starting. My problem is all the servers were having backup server disk mounted through nfs (...
0
votes
1answer
464 views

Can low NFS IO speeds effect client host performance when commands like tar is running?

We have NFS used over firewall which is limiting the performance. And we have this occasional scenarios of load increasing on the client host, whenever some huge IO operation is being done like tar. ...
0
votes
1answer
363 views

High server load on KVM VPS

I have a KVM single core VPS optimized for hosting static content running only Nginx 1.13.8 with SSD and 1GB RAM with a hosting provider on a package of 100 Mbit/s unmetered bandwidth. OS in use is 3....
0
votes
1answer
322 views

CPU wait state (RAM) stats?

As far as I understand, the wa % stat displayed by top is the I/O wait (i.e. hard drive). Is there a way to get similar wait stats, but for when the CPU is waiting for memory? My server is pretty ...
0
votes
1answer
526 views

Find root cause for high load average happened in the past on a Linux server

I usually have Nagios agents installed on all our Linux servers so we get detailed report of what's happening on them in real-time and we also have historical data. However there is one RHEL 7 server ...
-1
votes
2answers
77 views

server average load exact formula

I was in assumption cpu average load is calculated depend on number of process in running state (R state) + process waiting for I/O ( D state). But today I noticed that server is showing high load ...
0
votes
3answers
5k views

High load average, when should I be worried? [duplicate]

I have a server which runs a few hundred processes simultaneously, most of them are idle, it is some sort of web crawler it sleeps between requests for various reasons. So as a result, my load ...
0
votes
0answers
35 views

Process CPU% doubles when paired with more, similar processes

We're running into an interesting conundrum that I'd appreciate some help troubleshooting. We have a service that has several processes. To distribute load, we can startup n-processes of most types. ...
0
votes
2answers
182 views

Discrepancy between “ps aux” and the 1-minute average server load

I am a Linux rookie, so I'm trying to figure out a discrepancy. The problem is that the 1-minute average load available in /proc/loadavg doesn't make sense when compared to the output of the "ps aux" ...
0
votes
1answer
128 views

Could this process bring down the server?

I'm trying to understand why a server (AWS Ubuntu) sometime becomes unresponsive and eventually has to be restarted. While looking through top logs, I found a process that I think might be causing ...
0
votes
0answers
36 views

Does datacenter connectivity affect server load averages?

This may be a stupid question. My hosting datacenter (InMotion Hosting) just had about an hour of downtime due to 'connectivity issues'. As soon as everything started coming back up I logged into ...
1
vote
3answers
507 views

How can I *slowly* delete a large directory hiearachy to reduce disk i/o & load?

I have an ubuntu linux system. I have a directory which has a large amount of files. I can use rm -rf $NAME to delete it all. However that can use a lot of disk I/O and cause load to increase, because ...
0
votes
1answer
84 views

cpulimit, but for load? Pause a command until load avg goes below some figure?

The programme cpulimit on Linux is great. You can tell it to limit a process so that it doesn't use more than X% of the CPU. For example, I know someone who's laptop overheats if the CPU runs too hot ...
0
votes
1answer
553 views

KVM Virtual Machine high load average but low cpu and ram usage-why?

I have a web server with nginx and php-fpm 5.6. It is one virtual machine of KVM. Here is ovs between VMs. The parameters of this Vm are : 4 CPU, 6GB RAM and 50 GB disk with raw, Debian 8.6. There are ...
1
vote
1answer
490 views

How do I identify which process spikes server load

I am logging service activity to grafana and find that my linux based server shows a big spike in load exactly every 20 minutes. Is there a simple way to identify which process is causing the spike. ...
0
votes
1answer
69 views

Apache increasingly eats resources until restarted

My apache2 (Ubuntu 12.04) over some (variable) period of time comes to unusual system resources utilization. I'm positive that I don't have that amount of traffic and dos/ddos are pretty much out of ...
0
votes
0answers
113 views

Will the load average of my Linux box increase if it reaches file descriptors or TCP connections limit?

Will the load average of my Linux box increase if it reaches file descriptors or TCP connections limit ?
2
votes
1answer
83 views

Performance issues on fresh install of Debian 8

This is a fresh install of Debian 8 (minimal, netinstall). The load average is constantly >1 with sluggish response times, long hang times on login, and so on. I'm really baffled about what could ...
1
vote
2answers
2k views

Can HAProxy determine the load of a backend server and avoid sending requests to servers with a high load?

I'm wondering whether there would be an advantage or not to know the loadavg of each backend server and ask HAProxy to send the next request to the computer with the lowest loadavg. However, I have ...
0
votes
1answer
937 views

High load average on MySQL server [closed]

Recently we're experiencing serious performance problem on our MySQL server. Application server and database server are separate. At the database server end, load average getting higher in no time. ...
-1
votes
1answer
513 views

How does process CPU usage relate to Load Average? [duplicate]

I have the following host / load: Two 6-core CPUs, with HT (From what I understand, max load would be 24.0) 12 "primary" processes, with sustained usage of about 50% CPU Load average: 0.86 0.98 0....
0
votes
4answers
12k views

How to calculate maximum system load average for my system?

I have a situation where I wanted to monitor my servers load, for this I am trying to set a threshold, but I am not sure what is the maximum value my server can reach. This is the current system load ...
1
vote
1answer
60 views

on server start, process hwrng in “D” state causing load_average = 1

In a newly installed server (Debian 8), the average load never goes under 1 beside the fact there is almost nothing runnning, %CPU usage is always at 0%. After some search I found the process hwrng (...
3
votes
2answers
660 views

Linux: Extreme load on idle CPU

I'm investigating a strange situation with extreme load (but low CPU, IOWAIT, SYS, disk/network activity) on one of our linux servers on which many oracle database instances are running. When having ...
3
votes
3answers
424 views

Disk I/O and load average peaks once every hour

We have updated our server from Debian Wheezy to Jessie and from php5.6 to php7.0, but now we have a disk I/O and load average peak exactly every hour. The exact time depends on the system start time. ...
5
votes
4answers
556 views

Load average 3.00 on mostly idle server

I have a VPS hosting a small web app (apache, php-fpm, mysql) that's mostly idle for now as the traffic is quite low. Surprisingly, the load average is always >= 3.00: # uptime 02:20:00 up 69 days, ...
5
votes
2answers
2k views

How can I chose a max load threshold depending on the number of available cores?

I have a pipeline that runs some computationally intensive tasks on a Linux machine. The script that launches these checks the current load average and—if it is above a certain threshold— waits until ...
2
votes
0answers
75 views

When I ssh to my oracle server, the CPU load reduces

I am facing strange issue on an Oracle server. The server is on high CPU load everyday for around 5hrs. This starts everyday at around 03:46 AM and continues for next 5 hrs. CPU load reduces ...
6
votes
3answers
3k views

CPU overloaded but no proccess is using more than 1% [duplicate]

I am monitoring a Cpanel (centos) server which have a 2-core CPU (4 virtual CPU cores) and it seems to be overloaded because I got this values using top: load average: 11.80, 13.30, 13.02 Cpu(s): 42....
3
votes
1answer
4k views

ATOP: vmcom / vmlim -> SWP is red

in ATOP I'm getting a red alert like this: vmcom 76.3G | vmlim 49.8G This is a value that is attached to the "SWP" (so "SWAP" is meant?)-line. What does this mean and what can I do against it?
0
votes
1answer
197 views

Server crashes with incredibly high load

I got a problem with a KVM-virtualized server (Proxmox-based), running on Debian 7.8 and PLESK. Sometimes there are loads > 200 (sic!) and I just do not get the reason why. The monitoring shows the ...
1
vote
0answers
636 views

determine if threads on a cpu are blocked? What are the causes of thread blocks?

The load-average reported by uptime command also displayed in top provides the the average run-queue length over time (1, 5 and 15 minutes) The run-queue length is the sum of the number of threads (...
1
vote
2answers
245 views

Medium CPU usage but high load

I know this has been asked multiple times, and generally wa causes high load even if CPU isn't the culprit. However, in our case, wa is ~0 and CPU is at ~45% on a 4 core, 8 thread dedicated server. ...
1
vote
2answers
578 views

Low CPU and Memory utilization. Does that mean server is healthy?

On a fairly busy RHEL6 server I keep noticing on average following indications CPU Usage : 2%. CPU Load AVG: 0.4,0.2,0.1 Memory Usage: 1.3 out of 16 GB This is the CPU this server has Intel(R) ...
2
votes
1answer
531 views

Load average increasing along with firewall throughput

I've just pushed a large change to my backend code and I've noticed a massive increase in the load average in the few hours since the push. I looked at Munin for what the problem might be and I ...
9
votes
5answers
5k views

High load due to I/O wait in Ubuntu 12.04 on EC2 instance

I am using Ubuntu server 12.04 , having trouble finding cause of load, I have seen change in response time of server from past week after reading Linux Troubleshooting, Part I: High Load It seems ...