The interesting lines are:
The busiest device is dm-0 with 263.15 writes per second but the device with the longest average read queue size is sdb, sda has a higher utilisation and a quite high run queue size.
Run:
to find out what /dev/sdb and /dev/sda is mounted as.
The NFS mounts are evidently very quiet, but running iostat after your machine has done a lot of real work may show something different.
RAID 5 is good for securing your data but for best performance you need striping, the best compromise is a stripe mirrored against a another stripe.
Last edited by TonyFullerMalv; 02-13-2010 at 10:26 AM..
hi,
can any one tell me, is there is any way i can check the performance of my solaris 8 os on an Ent 3500. Other than top to check for the top most processes, how to make the calculations with vmstat, iostat, mpstat and nfsstat. Or is there any other tools that i can use?
cheers. (3 Replies)
Hi All
I am looking for a script that would collect statistics in a summarised format.
CPU, Memory,Swap, Wait queue, Run queue and disk activity.
Something that would allow me to profile the environment based on a 1 line output that I could run every 15 min.
Thx
Junaid (1 Reply)
Hi all
The place I work for is about to to place there database server under heavy load for testing and would like the effect recorded as much as possible.
Can anyone point me in the right direction with respect to real time system monitoring. I am aware of of 'sar', vmstat etc and hope to... (2 Replies)
Hello,
I am trying to find a way to view current CPU and disk usage. I used to use nmon which worked fine but since an upgrade to our servers this is no longer available. I have tried to get it reinstalled to no avail!
Are there any other commands you can use within unix which will allow me... (4 Replies)
This is my first post (yes I'm a newbie).... :D
I'm looking for a list of Linux and Unix commands for performance monitoring and a good sight or area on this site that would have man pages and or information on those commands.....
Thanks if anyone can take the time to post..... :cool: (14 Replies)
Hi all,
I am planning to give a presentation on performance measure. I have decided to focus on the commands which are used to know the performance of the server. I have a idea of prstat,vmstat,netstat, and iostat. Could anybody suggest me any other commands which are used for perforamance... (7 Replies)
As I am new to the Unix field, I would like to get the clarification regarding the Filesystem.
The scenario is.. The filesystem (/drbackup) is getting monitored and if it exceeds the threshold, we will receive an alert from it. The issue is that we receive an alert with the description of... (2 Replies)
What tools can I use to look "deeper" into a process to see if the job is actually running or just hanging. What is the best method to accomplish this?
SunOS 5.10 Generic_142900-14 sun4v sparc SUNW,T5240 (2 Replies)
Hi all,
-------------------------
Linux OS Version/Release:
-------------------------
Red Hat Enterprise Linux Server release 5.5 (Tikanga)
Linux <hostname> 2.6.18-194.8.1.el5 #1 SMP Wed Jun 23 10:52:51 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux
I have a server that hosts 30+ Oracle... (1 Reply)
Discussion started by: newbie_01
1 Replies
LEARN ABOUT MOJAVE
chcpu
CHCPU(8) System Administration CHCPU(8)NAME
chcpu - configure CPUs
SYNOPSIS
chcpu -c|-d|-e|-g cpu-list
chcpu -p mode
chcpu -r|-h|-V
DESCRIPTION
chcpu can modify the state of CPUs. It can enable or disable CPUs, scan for new CPUs, change the CPU dispatching mode of the underlying
hypervisor, and request CPUs from the hypervisor (configure) or return CPUs to the hypervisor (deconfigure).
Some options have a cpu-list argument. Use this argument to specify a comma-separated list of CPUs. The list can contain individual CPU
addresses or ranges of addresses. For example, 0,5,7,9-11 makes the command applicable to the CPUs with the addresses 0, 5, 7, 9, 10, and
11.
OPTIONS -c, --configure cpu-list
Configure the specified CPUs. Configuring a CPU means that the hypervisor takes a CPU from the CPU pool and assigns it to the vir-
tual hardware on which your kernel runs.
-d, --disable cpu-list
Disable the specified CPUs. Disabling a CPU means that the kernel sets it offline.
-e, --enable cpu-list
Enable the specified CPUs. Enabling a CPU means that the kernel sets it online. A CPU must be configured, see -c, before it can be
enabled.
-g, --deconfigure cpu-list
Deconfigure the specified CPUs. Deconfiguring a CPU means that the hypervisor removes the CPU from the virtual hardware on which
the Linux instance runs and returns it to the CPU pool. A CPU must be offline, see -d, before it can be deconfigured.
-p, --dispatch mode
Set the CPU dispatching mode (polarization). This option has an effect only if your hardware architecture and hypervisor support
CPU polarization. Available modes are:
horizontal The workload is spread across all available CPUs.
vertical The workload is concentrated on few CPUs.
-r, --rescan
Trigger a rescan of CPUs. After a rescan, the Linux kernel recognizes the new CPUs. Use this option on systems that do not auto-
matically detect newly attached CPUs.
-V, --version
Display version information and exit.
-h, --help
Display help text and exit.
RETURN CODES
chcpu has the following return codes:
0 success
1 failure
64 partial success
AUTHOR
Heiko Carstens <heiko.carstens@de.ibm.com>
COPYRIGHT
Copyright IBM Corp. 2011
SEE ALSO lscpu(1)AVAILABILITY
The chcpu command is part of the util-linux package and is available from Linux Kernel Archive <https://www.kernel.org/pub/linux/utils
/util-linux/>.
util-linux July 2014 CHCPU(8)