I/O performance

Thread Tools Search this Thread
Top Forums UNIX for Advanced & Expert Users I/O performance
# 1  
Old 08-31-2006
Error I/O performance

i want to determine I/O performance of an
but iostat dont give correct results because
the disk that i am writing to and reading from,
are not physical disk of the host machine,
instead of these local disks we are using
a network storage.
is there any standard way in unix to get these performance results
# 2  
Old 08-31-2006
The simple answer is to create a test dummy directory on a local disk and run the app against local devices. If iostat is what you want.

Does your box have nfsstat? However iostat & nfsstat tell you about a subsystem(s), not necessarily what one executable is doing.

profiling an app gives you real data for just what the app is doing, and eliminates everybody else. IT may be worth looking at.
# 3  
Old 09-10-2006
If you are using Solaris 10, you can use the iosnoop command that is built with DTrace. Search google for the iosnoop script.
It is able to break down the IO per binary.
Login or Register to Ask a Question

Previous Thread | Next Thread

7 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Performance issue

hi I am having a performance issue with the following requirement i have to create a permutation and combination on a set of three files such that each record in each file is picked and the output is redirected in a specific format but it is taking around 70 odd hours to prepare a combination... (7 Replies)
Discussion started by: mad_man12
7 Replies

2. Solaris

best way and best performance

Hi all, I have two storadge 3510 Fc .. with 12 disks 146Gb ..total 1752Gb each storadge. I need to use about 1.4 Tb of it. and want RAID1 .. I need 13 mount points .. So question: for best performance and redundjancy how I must do it. create 13 logical drives on each stordge with same size... (1 Reply)
Discussion started by: samar
1 Replies

3. News, Links, Events and Announcements

Announcing collectl - new performance linux performance monitor

About 4 years ago I wrote this tool inspired by Rob Urban's collect tool for DEC's Tru64 Unix. What makes this tool as different as collect was in its day is its ability to run at a low overhead and collect tons of stuff. I've expanded the general concept and even include data not available in... (0 Replies)
Discussion started by: MarkSeger
0 Replies

4. UNIX for Advanced & Expert Users

performance issue

Hi, on a linux server I have the following : vmstat 2 10 procs memory swap io system cpu r b w swpd free buff cache si so bi bo in cs us sy id 0 4 0 675236 39836 206060 1617660 3 3 3 6 8 7 1 1 ... (1 Reply)
Discussion started by: big123456
1 Replies

5. UNIX for Advanced & Expert Users


Hi, I have this on a AIX UNIX machine : ps aux| head -20 USER PID %CPU %MEM SZ RSS TTY STAT STIME TIME COMMAND root 516 23.7 0.0 12 15808 - A 19:38:15 903:13 wait root 774 23.7 0.0 12 15808 - A 19:38:15 902:13 wait root 1290 23.6 0.0 ... (2 Replies)
Discussion started by: big123456
2 Replies

6. UNIX for Advanced & Expert Users


Hi, 1-in vmstat commande line, in reply, which column is the more important to look and verify if server is very slow ? 2-how can I see how many sessions are opened with the same login ? Many thanks before. (2 Replies)
Discussion started by: big123456
2 Replies

7. UNIX for Advanced & Expert Users


Hello, i have changed a slow server with Solaris 7 to a bigger one with Solaris 8 (Sun Ultra 2). Now i have a real bad performance problem (only CPU). Solaris 7 ran with standard FTP and Samba 2.0.7. The new machine is running ProFTP and Samba 2.0.9. There are a lot of NFS Shares and... (5 Replies)
Discussion started by: olso
5 Replies
Login or Register to Ask a Question

Featured Tech Videos