Load Average and Lwps


 
Thread Tools Search this Thread
Operating Systems Solaris Load Average and Lwps
# 1  
Old 04-23-2010
Power Load Average and Lwps

Code:
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   7368K 7392K   0.0%   0:08:35 0.0%
Total: 428 processes, 8117 lwps, load averages: 14.96, 15.73, 16.51

Above ouput is taken from prstat -a on sun database server.Kernel is 5.10 Generic_127127-11. Hardware is Sun-Fire-V890.

1) Can any one tell me why the load average is so high though the cpu utilization is 85%.
2) what is lwps and is it harmfull for the system

Last edited by Scott; 04-23-2010 at 03:30 AM.. Reason: Code tags, please...
# 2  
Old 04-23-2010
# 3  
Old 04-23-2010
Quote:
Originally Posted by snjksh
1) Can any one tell me why the load average is so high though the cpu utilization is 85%.
Because there are some short periods of time where the run queue is empty and all threads are waiting for something to happen while there are more other periods of time when plenty of threads want a CPU but none is available. To know if this is an issue, you should tell how many CPUs/Cores/Chip Threads are available on your machine.
Quote:
2) what is lwps and is it harmfull for the system
lwps are light weight processes a.k.a threads. The number of lwps isn't harmful at all.
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. HP-UX

Load average unit

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

2. UNIX for Dummies Questions & Answers

Help with load average?

how load average is calculated and what exactly is it difference between cpu% and load average (9 Replies)
Discussion started by: robo
9 Replies

3. UNIX for Advanced & Expert Users

Load average in UNIX

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

4. UNIX for Dummies Questions & Answers

Load Average threshold

What should be the threshold for load average of a quad core processor? What constitutes "good" and "bad" load average values? (2 Replies)
Discussion started by: proactiveaditya
2 Replies

5. UNIX for Dummies Questions & Answers

Please Help me in my load average

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. Solaris

load average query.

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

7. UNIX for Dummies Questions & Answers

top - Load average

Hello, Here is the output of top command. My understanding here is, the load average 0.03 in last 1 min, 0.02 is in last 5 min, 0.00 is in last 15 min. By seeing this load average, When can we say that, the system load averge is too high? When can we say that, load average is medium/low??... (8 Replies)
Discussion started by: govindts
8 Replies

8. Shell Programming and Scripting

Determening load average.

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

9. UNIX for Dummies Questions & Answers

Load Average

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

10. UNIX for Advanced & Expert Users

load average

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
Login or Register to Ask a Question