Solved

top shows high cpu iowait

Posted on 2002-07-03
4
2,551 Views
Last Modified: 2013-12-27
Hi,
  My server shows very high (98%) cpu iowait all the time via top;
iostat -xtc 5 does not show high disk activities; netstat -i 5 does not show high
network traffic.

Q1.  what exaclty does 98% iowait mean?

Q2. how can I find out exaclty what the cpus are waiting for;
mpstat show both cpus wait 98% all the time.


thanks in advance
0
Comment
Question by:siunix
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
4 Comments
 
LVL 4

Expert Comment

by:Otetelisanu
ID: 7140332
Resource                         Description
cpu_idle       Percent of time that the CPU is idle.
cpu_iowait     Percent of time that the CPU spends waiting for I/O.
cpu_kernel     Percent of time that the CPU spends in the kernel.
cpu_type       CPU architecture.
cpu_user       Percent of time that the CPU spends running users program.
0
 
LVL 4

Expert Comment

by:Otetelisanu
ID: 7140343
mpinfo -N -v
0
 

Author Comment

by:siunix
ID: 7142083
there's no mpinfo on solaris 2.8.
0
 
LVL 4

Accepted Solution

by:
Otetelisanu earned 100 total points
ID: 7142536
0

Featured Post

Free Tool: Postgres Monitoring System

A PHP and Perl based system to collect and display usage statistics from PostgreSQL databases.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
netstat -a in AIX unix 8 53
AIX Server 10 91
Solaris acount issues 44 49
insert flat files in to tables based upon first character 1 37
Let's say you need to move the data of a file system from one partition to another. This generally involves dismounting the file system, backing it up to tapes, and restoring it to a new partition. You may also copy the file system from one place to…
Java performance on Solaris - Managing CPUs There are various resource controls in operating system which directly/indirectly influence the performance of application. one of the most important resource controls is "CPU".   In a multithreaded…
Learn several ways to interact with files and get file information from the bash shell. ls lists the contents of a directory: Using the -a flag displays hidden files: Using the -l flag formats the output in a long list: The file command gives us mor…
This video shows how to set up a shell script to accept a positional parameter when called, pass that to a SQL script, accept the output from the statement back and then manipulate it in the Shell.

730 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question