Login or Register to Ask a Question and Join Our Community


UNIX for Advanced & Expert Users

Identify high I/O procecess

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums UNIX for Advanced & Expert Users Identify high I/O procecess
# 1  
Old 09-01-2011
Identify high I/O procecess
Hello I am trying to identify what is consuming my I/O (looks 100% in glance).

Howver on my system HP-UX 104 B.11.11 U 9000/800

The only option in iostat seems to be -t which is not very usefull

iostat -p is not available.

Please advice on how I should proceed.

Thank you in advance.
# 2  
Old 09-01-2011
ps -l shows wchan, the channel a proc is waiting on.
This User Gave Thanks to DGPickett For This Post:
drbiloukos
# 3  
Old 09-02-2011
This is the output from ps -l

Code:
  F S        UID   PID  PPID  C PRI NI             ADDR   SZ            WCHAN TTY       TIME COMD
  1 S        103 24706 24608  0 158 20        2300f3240   98        1c6d97040 pts/3     0:00 sh
  1 R        103 18486 24706  3 178 20        17bd6d600   77                - pts/3     0:00 ps

I don't think this helps :-(
Last edited by pludi; 09-06-2011 at 05:57 AM..
# 4  
Old 09-05-2011
Well, for all processes, add -e ! The ps man also describes how to customize the output. I/O loading is a per process sort of thing. Now, page faults are an I/O cost, too, but their cost may be imposed by other processes!
Login or Register to Ask a Question

Previous Thread | Next Thread

9 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

Identify cause of high resource usage

hello all, on linux servers sometimes any of these resources (cpu,memory,disk) get a spike when you are not in front of the server. the duration of these spikes might be 5 mins or even whole weekend. my question is there a good way of capturing the events that caused these issues ( cpu or... (5 Replies)
Discussion started by: coolatt
5 Replies

2. Shell Programming and Scripting

what would a script include to find CPU's %system time high and user time high?

Hi , I am trying to :wall: my head while scripting ..I am really new to this stuff , never did it before :( . how to find cpu's system high time and user time high in a script?? thanks , help would be appreciated ! :) (9 Replies)
Discussion started by: sushwey
9 Replies

3. Red Hat

apache high cpu load on high traffic

i have a Intel Quad Core Xeon X3440 (4 x 2.53GHz, 8MB Cache, Hyper Threaded) with 16gig and 1tb harddrive with a 1gb port and my apache is causing my cpu to go up to 100% on all four cores heres my http.config <IfModule prefork.c> StartServers 10 MinSpareServers 10 MaxSpareServers 15... (4 Replies)
Discussion started by: awww
4 Replies

4. Shell Programming and Scripting

Identify high values "ÿ" in a text file using Unix command

I have high values (such as ÿÿÿÿ) in a text file contained in an Unix AIX server. I need to identify all the records which are having these high values and also get the position/column number in the record structure if possible. Is there any Unix command by which this can be done to : 1.... (5 Replies)
Discussion started by: devina
5 Replies

5. Shell Programming and Scripting

Identify script please!

Have a script that I'm trying to adapt for something else, but I do not understand the following lines. Can anyone help? I know what expr does, `expr 8 + 2`, but: FILENAME=`expr //$FILE : '.*/\(.*\)'` UNPACKDIR=`echo $FILE | sed -e s/$FILENAME//g` Thanks (6 Replies)
Discussion started by: bound4h
6 Replies

6. AIX

Script to identify high CPU usage processes

Hi Guys, I need to write a script capable of identifying when a high cpu utilitzation process. It sounds simple but we are on a AIX 5.3 environment with Virtual CPU's (VP's) and logical CPU's. Please any ideas or tips would be highly appreciated. Thanks. Harby. (6 Replies)
Discussion started by: arizah
6 Replies

7. UNIX for Advanced & Expert Users

identify the unix process performing high disk i/o reads and writes

Guys, Is there any UNIX command that captures the 'Unix process which is performing high disk I/O reads and writes'. can you help me in this? -Swamy (6 Replies)
Discussion started by: avsswamy
6 Replies

8. Shell Programming and Scripting

identify the unix processes performing high disk i/o reads and writes

I would like to write shell/perl script which identifies the top unix processes that are performing high disk I/O's or/and writes If any one knows the solution please help me? -Swamy (0 Replies)
Discussion started by: avsswamy
0 Replies

9. UNIX for Advanced & Expert Users

Sun: High kernel usage & very high load averages

Hi, I am seeing very high kernel usage and very high load averages on my system (Although we are not loading much data to our database). Here is the output of top...does anyone know what i should be looking at? Thanks, Lorraine last pid: 13144; load averages: 22.32, 19.81, 16.78 ... (4 Replies)
Discussion started by: lorrainenineill
4 Replies
Login or Register to Ask a Question