12-16-2009
Depends on what you're running....disk intensive operations will have different tolerances than memory intensive...
Point to note - The load average really relates to run-queue length (i.e sum of processes waiting in the run-queue plus those currently executing), so it's more about what still needs to be done, than what is currently being done...
Having said that, :-) short answer is that general consensus is that a load average of 4*number of cpus is considered reasonable.
Adrian Cockcroft wrote a couple of excellent books on performance tuning - highly reccommended reading...
HTH
10 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
we have an unix system which has
load average normally about 20.
but while i am running a particular unix batch which performs heavy
operations on filesystem and database average load
reduces to 15.
how can we explain this situation?
while running that batch idle cpu time is about %60-65... (0 Replies)
Discussion started by: gfhgfnhhn
0 Replies
2. UNIX for Dummies Questions & Answers
Hello all, I have a question about load averages.
I've read the man pages for the uptime and w command for two or three different flavors of Unix (Red Hat, Tru64, Solaris). All of them agree that in the output of the 2 aforementioned commands, you are given the load average for the box, but... (3 Replies)
Discussion started by: Heathe_Kyle
3 Replies
3. Shell Programming and Scripting
Hi,
I'm new to shell scripting. I need to make a script to add on to my cronjobs.
The script must get the value of load average from my server and if its greater than 10 it should stop my apache service. I cant find a way to get the value of load average in integer type to do the check. Any... (4 Replies)
Discussion started by: jibsonline
4 Replies
4. Solaris
Hi,
i have installed solaris 10 on t-5120 sparc enterprise.
I am little surprised to see load average of 2 or around on this OS.
when checked with ps command following process is using highest CPU. looks like it is running for long time and does not want to stop, but I do not know... (5 Replies)
Discussion started by: upengan78
5 Replies
5. UNIX for Dummies Questions & Answers
Hello AlL,..
I want from experts to help me as my load average is increased and i dont know where is the problem !!
this is my top result :
root@a4s # top
top - 11:30:38 up 40 min, 1 user, load average: 3.06, 2.49, 4.66
Mem: 8168788k total, 2889596k used, 5279192k free, 47792k... (3 Replies)
Discussion started by: black-code
3 Replies
6. UNIX for Advanced & Expert Users
Hi ,
I am using 48 CPU sunOS server at my work.
The application has facility to check the current load average before starting a new process to control the load.
Right now it is configured as 48. So it does mean that each CPU can take maximum one proces and no processe is waiting.
... (2 Replies)
Discussion started by: kumaran_5555
2 Replies
7. Solaris
NPROC USERNAME SWAP RSS MEMORY TIME CPU
320 oracle 23G 22G 69% 582:55:11 85%
47 root 148M 101M 0.3% 99:29:40 0.3%
53 rafmsdb 38M 60M 0.2% 0:46:17 0.1%
1 smmsp 1296K 5440K 0.0% 0:00:08 0.0%
7 daemon ... (2 Replies)
Discussion started by: snjksh
2 Replies
8. UNIX for Dummies Questions & Answers
how load average is calculated and what exactly is it
difference between cpu% and load average (9 Replies)
Discussion started by: robo
9 Replies
9. HP-UX
Hi,
On load average graph, unit is 100m, 200m, 300...800m.
I don't understand what it means.
Thx for helping (3 Replies)
Discussion started by: Michenux
3 Replies
10. Infrastructure Monitoring
Hii everyone.
I am here with a new query hoping linux gurus can help me.
we have server that was cloned from physical to virtual. Now the load on this server has tremendously reduced. But the threshold set are w.r.t physical server and we do not receive any alert for load as the increased... (1 Reply)
Discussion started by: zsycho
1 Replies
LEARN ABOUT XFREE86
uptime
UPTIME(1) User Commands UPTIME(1)
NAME
uptime - Tell how long the system has been running.
SYNOPSIS
uptime [options]
DESCRIPTION
uptime gives a one line display of the following information. The current time, how long the system has been running, how many users are
currently logged on, and the system load averages for the past 1, 5, and 15 minutes.
This is the same information contained in the header line displayed by w(1).
System load averages is the average number of processes that are either in a runnable or uninterruptable state. A process in a runnable
state is either using the CPU or waiting to use the CPU. A process in uninterruptable state is waiting for some I/O access, eg waiting for
disk. The averages are taken over the three time intervals. Load averages are not normalized for the number of CPUs in a system, so a
load average of 1 means a single CPU system is loaded all the time while on a 4 CPU system it means it was idle 75% of the time.
OPTIONS
-p, --pretty
show uptime in pretty format
-h, --help
display this help text
-s, --since
system up since, in yyyy-mm-dd HH:MM:SS format
-V, --version
display version information and exit
FILES
/var/run/utmp
information about who is currently logged on
/proc process information
AUTHORS
uptime was written by Larry Greenfield <greenfie@gauss.rutgers.edu> and Michael K. Johnson <johnsonm@sunsite.unc.edu>
SEE ALSO
ps(1), top(1), utmp(5), w(1)
REPORTING BUGS
Please send bug reports to <procps@freelists.org>
procps-ng December 2012 UPTIME(1)