12-28-2007
Nothing is broken, you don't have to do anything. A page fault is a normal activity in a modern OS. Solaris calls them "major" if a disk access is needed.
10 More Discussions You Might Find Interesting
1. Solaris
Hi,
I am trying to take the Statistics of the machine during load.Can someone explian the parameters of
iostat:
tty sd1 sd2 sd3 sd4 cpu
tin tout kps tps serv kps tps serv kps tps serv kps tps serv us sy wt id
vmstat:
kthr ... (1 Reply)
Discussion started by: grrajeish
1 Replies
2. Solaris
All:
I have a V445 server with four IIIi CPUs and 8 GB RAM running Solaris 10 and an Oracle database along with some app server components and we have had some performance issues - so I collected some VMSTAT and MPSTAT data over the course of three days with a 15-minute polling interval.
I... (1 Reply)
Discussion started by: jeffd4d
1 Replies
3. Solaris
Hi,
I would like to clearly understand the output of the mpstat command. What is the mutex spins and also context switches? What if we saw that the number of mutex spins is high. Basically, what to look for in the output of the mpstat command? What is wrong and what is ok. what is the value... (3 Replies)
Discussion started by: Pouchie1
3 Replies
4. AIX
I have a number of LPARs on one P520. All LPARs are running 5.3 and I observe the following:
On some LPARs the number of CPUs found do not match between topas and mpstat.
Server 1:
$ mpstat
System configuration: lcpu=4 ent=0.2 mode=Uncapped
cpu min maj mpc int cs ics rq ... (1 Reply)
Discussion started by: petervg
1 Replies
5. Linux
mpstat -P ALL 1 10
it results..
08:05:54 PM CPU %user %nice %sys %iowait %irq %soft %steal %idle intr/s
08:05:55 PM all 0.00 0.00 0.49 0.00 0.49 0.00 0.00 99.02 1024.75
08:05:55 PM 0 0.00 0.00 0.00 0.00 0.99 0.00 0.00 ... (1 Reply)
Discussion started by: pritesh_patil
1 Replies
6. Shell Programming and Scripting
HI I ma using mpstat and sar commands to check the cpu utilisation
but the results are not matching .I dont understand why thisis happening?
$ sar -u 12 5
Linux 2.6.9-89.35.1.ELhugemem (abcd.efgh.com) 03/07/2013
02:43:16 AM CPU %user %nice %system %iowait %idle... (1 Reply)
Discussion started by: ptappeta
1 Replies
7. Shell Programming and Scripting
HI ,
I am wrirting a script for checking the performance monitoring on Linux System when my application is running.
I have to run a test for 30 minutes on some server and while the test is running i have to capture the perfromance metrics of Linux through vmstat , sar, mpstat, free.
here is the... (3 Replies)
Discussion started by: Anamica
3 Replies
8. UNIX and Linux Applications
hi everyone,
We've generated mpstat.out file monitoring cpu utilization and the file is ready now.Wanted to generate graphical charts for the same output data.
Can anyone pleas suggest tool for the same.? (1 Reply)
Discussion started by: Kathraji
1 Replies
9. Shell Programming and Scripting
I have a script which runs the mpstat and prints the output in a file. In order capture highest cpu ususage from the generated output file,
have to manually tail the output file and need to grab which cpu has highest value (which is very annoying)
Is there a way we can automate that process of... (3 Replies)
Discussion started by: Optimus81
3 Replies
10. Shell Programming and Scripting
I want to get average idle time of the server using mpstat. The problem I am having is %idle is not in same columns in all the versions of linux.
example 1:
example 2:
I tried below command as generalized solution but as Average as one less column output is not proper.
I am... (1 Reply)
Discussion started by: kumarjohn
1 Replies
LEARN ABOUT MOJAVE
iosnoop
iosnoop(1m) USER COMMANDS iosnoop(1m)
NAME
iosnoop - snoop I/O events as they occur. Uses DTrace.
SYNOPSIS
iosnoop [-a|-A|-Deghinostv] [-d device] [-f filename] [-m mount_point] [-n name] [-p PID]
DESCRIPTION
iosnoop prints I/O events as they happen, with useful details such as UID, PID, block number, size, filename, etc.
This is useful to determine the process responsible for using the disks, as well as details on what activity the process is requesting. Be-
haviour such as random or sequential I/O can be observed by reading the block numbers.
Since this uses DTrace, only users with root privileges can run this command.
OPTIONS
-a print all data
-A dump all data, space delimited
-D print time delta, us (elapsed)
-e print device name
-i print device instance
-N print major and minor numbers
-o print disk delta time, us
-s print start time, us
-t print completion time, us
-v print completion time, string
-d device
instance name to snoop (eg, dad0)
-f filename
full pathname of file to snoop
-m mount_point
mountpoint for filesystem to snoop
-n name
process name
-p PID process ID
EXAMPLES
Default output, print I/O activity as it occurs,
# iosnoop
Print human readable timestamps,
# iosnoop -v
Print major and minor numbers,
# iosnoop -N
Snoop events on the root filesystem only,
# iosnoop -m /
FIELDS
UID User ID
PID Process ID
PPID Parent Process ID
COMM command name for the process
ARGS argument listing for the process
SIZE size of the operation, bytes
BLOCK disk block for the operation (location. relative to this filesystem. more useful with the -N option to print major and minor num-
bers)
STIME timestamp for the disk request, us
TIME timestamp for the disk completion, us
DELTA elapsed time from request to completion, us (this is the elapsed time from the disk request (strategy) to the disk completion
(iodone))
DTIME time for disk to complete request, us (this is the time for the disk to complete that event since it's last event (time between
iodones), or, the time to the strategy if the disk had been idle)
STRTIME
timestamp for the disk completion, string
DEVICE device name
INS device instance number
D direction, Read or Write
MOUNT mount point
FILE filename (basename) for I/O operation
NOTES
When filtering on PID or process name, be aware that poor disk event times may be due to events that have been filtered away, for example
another process that may be seeking the disk heads elsewhere.
DOCUMENTATION
See the DTraceToolkit for further documentation under the Docs directory. The DTraceToolkit docs may include full worked examples with ver-
bose descriptions explaining the output.
EXIT
iosnoop will run forever until Ctrl-C is hit.
AUTHOR
Brendan Gregg [Sydney, Australia]
SEE ALSO
iotop(1M), dtrace(1M)
version 1.50 Jul 25, 2005 iosnoop(1m)