01-13-2008
which os? some more informations are always usefull!
9 More Discussions You Might Find Interesting
1. HP-UX
I want to change some kernel parameters in HP-UX11, to do with Oracle upgrade/install.
I know this is done using SAM. I am told SAM will not let you enter values outside the allowable range. Could anyone tell me if they have experienced anything different?
In Solaris, I would copy the... (2 Replies)
Discussion started by: malcqv
2 Replies
2. AIX
I swapped out 2 72 gb disk drives for 2 146 gb drives, both of which spin at 15k.
Are there any I/O parameters I should modify or can modify to get the most out of the new disks?
Thanks,
Mike M. (1 Reply)
Discussion started by: gravy26
1 Replies
3. HP-UX
I've been trying to find out the following parameters of our Unix box:
==>OS version
==> patch level
and the following kernel parameters
=>maxfiles_lim
=>maxvgs
=>nproc
=>msgmni
=>ncsize
=>nfile
Could someone help me how would I find the above(commands)?
Thanks,
Bhagat (1 Reply)
Discussion started by: bhagat.singh-j
1 Replies
4. Solaris
Hi all
Seem to have a concurrent processes issue on a server of mine. At peak times, the application vendor reckons we need to up the amount, as it is reaching its limit and preventing any more processes.
Looking in /etc/system, nothing has been set, so server is running with default... (2 Replies)
Discussion started by: sbk1972
2 Replies
5. AIX
Hello,
On Aix 5.2, we changed the parameters tcp_keepinit, tcp_keepintvl and tcp_keepidle with the no command.
tunrestore -R is present in inittab
in the directory /etc/tunables we can clearly see the inclusion of parameters during reboot, including the file lastboot.log
... (0 Replies)
Discussion started by: dantares
0 Replies
6. Solaris
Hi gurus
Could anybody tell me which file is read by kernel to set its default system kernal parameters values in solaris. Here I am not taking about /etc/system file which is used to load kernal modules or to change any default system kernal parameter value
Is it /dev/kmem file or something... (1 Reply)
Discussion started by: girish.batra
1 Replies
7. Solaris
Dear All,
I want to check whether all essential kernel parameters are installed in my Solaris 10 System. Is there any way to find it.
And also how to tune it.
Kindly help.
Thanks and Regards
Rj (8 Replies)
Discussion started by: jegaraman
8 Replies
8. UNIX for Dummies Questions & Answers
Virtual Machine running on VMWare workstation 9.2
os : RHEL 5.8
RAM : 2.5GB
Swap : 2.6gb
CPU : 1 virtual CPU
Surprizingly I couldn't find much from googling on What exactly does Kernel parameters do ?
I was under the impression that kernel parameters just set the limits/maximum for a... (2 Replies)
Discussion started by: John K
2 Replies
9. AIX
Hi,
we've a gigabit Ethernet adapter. And we wanted to improve the performance by tuning network parameters. so' as per IBM info center,
http://publib.boulder.ibm.com/infocenter/aix/v7r1/index.jsp?topic=%2Fcom.ibm.aix.prftungd%2Fdoc%2Fprftungd%2Fnetw_opt.htm
we tried changing the tuning... (2 Replies)
Discussion started by: System Admin 77
2 Replies
LEARN ABOUT REDHAT
elvtune
ELVTUNE(8) System Manager's Manual ELVTUNE(8)
NAME
elvtune - I/O elevator tuner
SYNOPSIS
elvtune [ -r r_lat ] [ -w w_lat ] [ -b b_max ] /dev/blkdev1 [ /dev/blkdev2 ... ]
elvtune -h
elvtune -v
DESCRIPTION
elvtune allows to tune the I/O elevator per blockdevice queue basis. The tuning can be safely done at runtime. Tuning the elevator means
being able to change disk performance and interactiveness. In the output of elvtune the address of the queue tuned will be shown and it can
be considered as a queue ID. For example multiple partitions in the same harddisk will share the same queue and so tuning one partition
will be like tuning the whole HD.
OPTIONS
-r r_lat
set the max latency that the I/O scheduler will provide on each read.
-w w_lat
set the max latency that the I/O scheduler will provide on each write.
-b b_max
max coalescing factor allowed on writes when there are reads pending in the queue.
-h help.
-v version.
NOTE
Actually the only fields tunable are those relative to the IO scheduler. It's not possible to select a one-way or two-way elevator yet.
For logical blockdevices like LVM the tuning has to be done on the physical devices. Tuning the queue of the LVM logical device is useless.
RETURN VALUE
0 on success and 1 on failure.
HISTORY
Ioctls for tuning elevator behaviour were added in Linux 2.3.99-pre1.
AUTHORS
Andrea Arcangeli <andrea@suse.de> SuSE
Version 1.0 14 March 2000 ELVTUNE(8)