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Questions tagged [load-average]

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

In UNIX family Operating Systems, the load average represents the average system load over a period of time. It conventionally appears in the form of three numbers which represent the system load during the last one-, five-, and fifteen-minute periods. It's calculated according CPU usage, Disk I/O, Network I/O.

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Explain load averages on Solaris 10

I understand load averages on Linux, but am a bit mystified by the load averages on a legacy Solaris 10 machine my app runs on. The load averages seem impossibly high. Here's the output. [netcool1 (root)/]$ uptime 11:49am up 580 day(s), 10:51, …
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Load average at 1, even though I've stopped all services!

I have a virtual server running Debian 5 where any action is very slow (like password verification when logging in via SSH or doing su). I checked the load average, which is hovering around 1-2. Then I stopped all services (apache, mysql, postfix,…
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CPU load for high performance computing

Is there a reasonable/safe level of CPU load in the context of high performance computing? I understand the meaning of load average for servers in general, but do not know what to expect for servers built and used for high performance computing. Is…
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High load average, when should I be worried?

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 average is usually something like: 21.64, 27.05,…
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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 not seen anything that would offer such a…
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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 some cpu load on the machine, everything looks…
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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. On this server, we have: nginx/1.10.1 PHP…
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Nagios basic: understanding check_load graph

My db server (one cpu VM) is monitored by Nagios. I've no experience with Nagios and I've trouble understanding this graph: what is the unit on vertical axis? and the averages? what is "m"?
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Unusual load average for an idle workstation

I have a new workstation with an unusual high load average. The machine specs are: Xeon CPUs 256 GB of RAM 4 x 512 GB SSD connected to a LSI2108 RAID controller (in raid 5) I have installed CentOS 6.5 64 bit from the live cd, configured the…
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Apparently Unexplained Load Average

I have been experiencing very strange server load, but for no obvious reason. Could anyone explain the cause/how to debug further? One Minute - 22.9 Five Minutes - 17.98 Fifteen Minutes - 10.02 top - 20:34:28 up 22 days, 7:51, 0 users,…
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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 processes waiting for I/O . I then saw a blog post…
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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 cause it. Disk IO, network IO, and CPU usage are…
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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 average: 0.23, 1.52, 2.69 sudo nproc --all…
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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 immediately when I log-in (ssh) or after 5 hrs, which…
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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 (tasks) that are currently running plus the number…
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