04-30-2009
Is this a database box - maybe oracle - with CIO enabled or using raw devices and/or using async IO a lot?
Your output looks healthy if this is a peak time of the day - you should still monitor cpu it if goes up in peak times - eg during batches - and as IBM states, if you see all the time cpu usage above 80% you might want to think about adding one to avoid problems in times of high usage ...
I would like to see the output of vmstat -I 5 5 too if you dont mind ?
Kind regards
zxmaus
8 More Discussions You Might Find Interesting
1. Filesystems, Disks and Memory
All,
I am attempting to help tune a Sun for better performance (mainly for SAS 9.1), and have found indicators pointing to poor I/O utilization. I have run iostat -cx, and found one device in particular where the %w is in the 90's during processing. I have a feeling that this is where the SAS... (3 Replies)
Discussion started by: dj_is
3 Replies
2. Solaris
Sorry for asking basics. What exactly is the situation if device ID is same in iostat -Eni. What we must do then? Is there any relation b/w iostat and cfgadm? (3 Replies)
Discussion started by: mayahari
3 Replies
3. Shell Programming and Scripting
Friends.
I have to compare iostat -x output with a tool on solaris. Now there is column called wait in the output field which is showing zero. Now, in order to create some load on my system this is what i am doing
I am creating a file using dd command , the size of which is... (5 Replies)
Discussion started by: achak01
5 Replies
4. Red Hat
A find for the "iostat" command on a redhat 5 update 4 comes back with no results.
Any separate rpm needs to be installed to get the binary for this ?
Thanks in advance. (1 Reply)
Discussion started by: uxadmin007
1 Replies
5. Solaris
I all,
I would like to know what are the causes of :
-soft error
-harderror
-transport error
and how to avoid and repare them.
I got the iostat out put below:
atng-mm01% iostat -En | grep -i hard
c0t0d0 Soft Errors: 1 Hard Errors: 0 Transport Errors: 0
c0t0d1 ... (3 Replies)
Discussion started by: zaza
3 Replies
6. Solaris
Hello everyone,
Can you please explain me what kind of information do IOSTAT show ?
iostat -xnz 3 show me those informations:
The I/O of the c0t0d0 disk is normal ?
extended device statistics
r/s w/s kr/s kw/s wait actv wsvc_t asvc_t %w %b device
0.0 ... (3 Replies)
Discussion started by: adilyos
3 Replies
7. AIX
Hello, I support Oracle 11g on AIX 7.1.
Using the command
$iostat -D hdisk2 hdisk4 hdisk5 5
I get the following output:
hdisk5 xfer: %tm_act bps tps bread bwrtn
44.0 1.4M 178.2 1.4M 14.7K
read: ... (3 Replies)
Discussion started by: oracledba1024
3 Replies
8. Shell Programming and Scripting
In the perl one-liner below I am identifying the runs of 6a or 6A in each line starting with >. The code seems close but it prints each > line no matter if it has 6a or 6A in it. Only the line with the 6a or 6A needs to be printed.
So using the input file, only the >hg19_refGene_NM_001918_3... (10 Replies)
Discussion started by: cmccabe
10 Replies
LEARN ABOUT ULTRIX
iostat
iostat(1) General Commands Manual iostat(1)
Name
iostat - report I/O statistics
Syntax
iostat [ -c ] [ -t ] [ disknames ] [ interval ] [ count ]
Description
The command reports I/O statistics for terminals, disks and cpus. For terminals the number of input and output characters are counted.
For disks the number of 512 byte blocks per second and number of transfers per second are displayed. For cpus, it provides the percentage
of time the system has spent in user mode, in user mode running low priority (niced) processes, in system mode, and idling. On multipro-
cessor systems these cpu statistics represent a cumulative summary of all the cpus.
The optional disknames argument causes disk statistics to be displayed for the specified disks. If this argument is not specified then
disk statistics will be displayed for the first 3 disks only.
The optional interval argument causes to report once each interval seconds. The first report is for all time since a reboot and each sub-
sequent report is for the last interval only.
The optional count argument restricts the number of reports.
Options
-c Displays the percentage of time each cpu spent in user mode, running low priority (nice'd) processes, in system mode, and idling.
-t Displays the number of characters read from and written to terminals.
Examples
This example will cause cpu and disk statistics for the 5 disks ra0, ra1, ra2, ra3, and ra4.
iostat ra0 ra1 ra2 ra3 ra4
This example will cause cpu, terminal, and disk statistics for ra0 to be displayed and updated every 2 seconds.
iostat -t ra0 2
Files
See Also
vmstat(1), cpustat(1)
iostat(1)