Checking Linux Kernel Parameters before installation

Hi Everyone.
I am planning to install Oracle 10g XE and I know that with the installation kernel parameters will change. As I don`t know what will happen that in relation to the system, I would like to check default kernel parameters. I know it`s a Linux question but it`s indirectly related with the installation. So... I want to save that information if something goes wrong.
Can you help me?

Hi.
Thanks for the clue.
I did:
less /etc/sysctl.conf
and the output is:
# Kernel sysctl configuration file for Red Hat Linux
# For binary values, 0 is disabled, 1 is enabled. See sysctl(8) and
# sysctl.conf(5) for more details.
# Controls IP packet forwarding
net.ipv4.ip_forward = 0
# Controls source route verification
net.ipv4.conf.default.rp_filter = 1
# Do not accept source routing
net.ipv4.conf.default.accept_source_route = 0
# Controls the System Request debugging functionality of the kernel
kernel.sysrq = 0
# Controls whether core dumps will append the PID to the core filename.
# Useful for debugging multi-threaded applications.
kernel.core_uses_pid = 1
# Controls the use of TCP syncookies
net.ipv4.tcp_syncookies = 1
I don`t recognize here any of the kernel parameters listed in the installation guide for Oracle 10g XE. http://www.oracle.com/technology/software/products/database/xe/files/install.102/b25144/toc.htm (2.1.3 Server Component Kernel Parameter Requirements)
what do you mean with backup? Just copy&paste the output? If not I do I perform backup?
Can you help me?
thanks,
Kind Regards

Similar Messages

Where are the Linux kernel parameters?

I have successfully installed ORACLE on red hat linux 5.0
even though I didn't set the kernel parameters.
On Solaris these parameters can be set in the /etc/system file.
Where do you set SHMMAX and the kernel parameters in linux?
I could not find a similar file.
Please enlighten me.
Thank You
Be careful with environment variables!
run the root.sh script after installation!
null

Frank Westheider (guest) wrote:
: Mark Lee (guest) wrote:
: : I have successfully installed ORACLE on red hat linux 5.0
: : even though I didn't set the kernel parameters.
: : On Solaris these parameters can be set in the /etc/system
file.
: : Where do you set SHMMAX and the kernel parameters in linux?
: : I could not find a similar file.
: : Please enlighten me.
: : Thank You
: : Be careful with environment variables!
: : run the root.sh script after installation!
: Hi Mark.
: You have to install the Kernel-Sources and Include-Files.
: Just look in
: /usr/include/asm/*shm*.h
: and change the parameters. After this re-create the kernel with
: cd /usr/src/linux
: make clean && make dep && make && make modules && make
: modules_install
: and install the kernel-file (lilo/bootlin....).
: Ciao
: Frank Westheider
You might want to follow this thread (it's on the previous page
of threads):
Kernel Parameters?
From: Bolen Coogler (guest)
Email: [email protected]
Date: Mon Oct 26 16:00 CST 1998
The Oracle install instructions mention setting various kernel
parameters, such as:
SHMMAX 4294967296 (0x100000000)
SHMMIN 1
SHMMNI 100
SHMSEG 10
SEMMNS 200
SEMMNI 70
SEMMSL
While setting these parameters is VERY important in HP/UX or
Solaris, I haven't the slightest idea if this is really applies
to Linux. Does anyone know if tweaking these and other kernel
parameters matters in Linux? If so, where do you make these kind
of changes? (/usr/src/linux/include/linux/<something>.h ?)
My initial impression is the Oracle on Linux documentation is
converted Solaris boilerplate (i.e. %s/Solaris/Linux/g).
null

How Kernel Parameters values calculated in 10g*

Hi to all;
*10g Orace installation on OEL*
How Kernel Parameters values calculated in 10g
kernel.shmall = 2097152
kernel.shmmax = 2147483648
kernel.shmmni = 4096
+# semaphores: semmsl, semmns, semopm, semmni+
kernel.sem = 250 32000 100 128
fs.file-max = 65536
net.ipv4.ip_local_port_range = 1024 65000
net.core.rmem_default=262144
net.core.rmem_max=262144
net.core.wmem_default=262144
net.core.wmem_max=262144
Run the following command to change the current kernel parameters
/sbin/sysctl -p
** "/etc/security/limits.conf" **
*               soft    nproc   2047
*               hard    nproc   16384
*               soft    nofile 1024
*               hard    nofile 65536
My question I think 32 bit or 64 bit OS calculation will be same only.
I want know how it was calculated ?
Edited by: 969352 on Feb 9, 2013 7:02 AM

Hi
I suggest please review:
     Relationship Between Common Init.ora Parameters and Unix, Linux Kernel Parameters [ID 144638.1]
Regard
Helios

Kernel Parameters on Red Hat Linux

The installation instructions require us to set cetain kernel
parameters, such as SHMMAX, SHMSEG, SEMMNS, and so on.
Does anyone know how this is done for Red Hat Linux? I have
been hunting around the documentation and public domain web-
sites for a couple of weeks now and I haven't found any
reference to how to set these parameters.
Eternally grateful for any insights...
Cheers!
Stuart Housden
null

I had problems with 8i and 32Meg of SHMMAX (sometimes, when I
published an EJB, Oracle crashed). I didn't recompiled the
kernel, only did
echo 134217728 > /proc/sys/kernel/shmmax.
This limited the maximum shared memory to 128Meg (I installed
with JavaVM enabled), and I my problems got away.
Robson.
Anwar (guest) wrote:
: Stuart Housden (guest) wrote:
: : The installation instructions require us to set cetain kernel
: : parameters, such as SHMMAX, SHMSEG, SEMMNS, and so on.
: : Does anyone know how this is done for Red Hat Linux? I have
: : been hunting around the documentation and public domain web-
: : sites for a couple of weeks now and I haven't found any
: : reference to how to set these parameters.
: : Eternally grateful for any insights...
: : Cheers!
: : Stuart Housden
: This question was replied to multiple times on the list before,
: but here goes. Check out:
: http://jordan.fortwayne.com/oracle
: Basically, you have to edit the kernel header files, and
: recompile the kernel. Read the Kernel-HOWTO too.
: Anwar.
null

CentOS based linux VM running on Hyper-v : Checking root filesystem fails when kernel switches having old PV(para virtualised driver based on 2.6.32 linux kernel) to new PV(which is equivalent to linux integration component 3.4)

hi all,
I am running a CentOS base VM on top of Hyper-V server. I upgraded PV drivers of Hyper-V in linux kernel 2.6.32 in order to support
Windows Server 2012, then i am hitting below issue on Windows Server 2008 when kernel switches from old PV(which is 2.6.32 based) to new PV(which is equivalent to linux integration component 3.4).i
am hitting following filesystem check error messages :
Setting hostname hostname:
Checking root filesystem
fsck.ext3/dev/hda2:
The superblock could not be read or does not describe correct ext2 filesystem. If the device is valid and it really contains an ext2
filesystem(and not swap or ufs or something else),then the superblock is corrupt, and you might try running e2fsck with an alternate superblock:
e2fsck -b 8193 <device>
: No such file or directory while trying to open /dev/hda2
*** An error occurred during the filesystem check.
*** Dropping you to a shell; the system will reboot
*** When you leave the shell.
Also, when I go to the repair filesystem mode. I found out the strange behaviour when i ran those command :
(Repair filesytem) 1 # mount
/dev/hda2 on / type ext3 (rw)
proc on /proc type proc (rw)
(Repair filesystem) 1# cat /etc/mtab
/dev/hda2 /ext3 rw 0 0
proc /proc proc rw 0 0
(Repair filesystem) 1# df
Filesystem 1K-blocks used Available Use% Mountedon
/dev/hda2 4%
I think for all above command there should be /dev/sda2 instead of /dev/hda2.
Also my fstab , and fdisk -l looks like ok for me.
(Repair filesystem) 1# cat /etc/fstab
LABEL=/ / ext3 defaults 1 1
LABEL=/boot /boot ext3 defaults 1 2
devpts /dev/pts devpts gid=5,mode=620 0 0
tmpfs /dev/shm tmpfs defaults 0 0
proc /proc proc defaults 0 0
sysfs /sys sysfs defaults 0 0
LABEL=swap-xvda3 swap swap defults 0 0
(Repair filesystem) 1# fdisk -l
Device Boot Start End Block Id System
/dev/sda1 * 1 49 98535 83 Linux
Partition 1 does not end with cylinder boundary.
/dev/sda2 49 19197 39062500 83 Linux
Partition 2 does not end with cylinder boundary.
/dev/sda3 ......
Partition 3 does not ......
/dev/sda4 ......
Partition 4 does not end ....
(Repair filesystem) 1# e2label /dev/sda1
/boot
(Repair filesystem) 1# e2label /dev/sda2
(Repair fielsystem) 1# ls /dev/sd*
/dev/sda /dev/sda1 /dev/sda2 /dev/sda3 /dev/sda4
(Repair filesyatem) 1# ls /dev/hd*
ls: /dev/hd*: No such file or directory
Kindly suggest any configuration of windows server or kernel configs missing or how to resolve this issues
Many many thanks for your reply.
thanks & Regards,
Ujjwal

i am not able to understand duplicate UUID and from where it is picking /dev/hda* ?
~
VVM:>>
VVM:>> Output of dmesg | grep ata contain substring "Hyper-V" ?
VVM:>>
it doesn't contain "Hyper-V" or ata related message and the output doesn't change with boot parameter reserve=0x1f0, 0x8
~~
~~~~
==
output of dmesg related "ata" Ubuntu v13.04 mini.iso ( with boot parameter reserve=0x1f0, 0x8)
==
see later ( in "good situation" example )
~~
===
Disable legacy ATA driver by adding the following to kernel command line in /boot/grub/menu.lst:
reserve=0x1f0, 0x8
. (This option reserves this I/O region and prevents ata_piix from loading).
==
See output of dmesg related "ata" Ubuntu v13.04 mini.iso ( with boot parameter reserve=0x1f0, 0x8) :
~~
[ 0.176027]
libata version 3.00 loaded.
[ 0.713319]
ata_piix 0000:00:07.1: version 2.13
[ 0.713397]
ata_piix 0000:00:07.1: device not available (can't reserve [io 0x0000-0x0007])
[ 0.713404]
ata_piix: probe of 0000:00:07.1 failed with error -22
[ 0.713474]
pata_acpi 0000:00:07.1: device not available (can't reserve [io 0x0000-0x0007])
[ 0.713479]
pata_acpi: probe of 0000:00:07.1 failed with error -22
~~
As result: 1) IDE disk handled by hv_storvsc , but 2) no CD-ROM device
==
~ # blkid
/dev/sda1: LABEL="ARCH_BOOT" UUID="009c2043-4bl7-4f95-al4d-fb8951f95b5d" TYPE="ext2"
==
~~
VVM>>
VVM>>Q1: Output of blkid contain duplicate UUID ?
VVM>>
-> blkid contains duplicate UUID, below are the output.
~~
This situation is classic problem "
use hv_storvsc instead of ata_piix to handle the IDE disks devices ( but not for the DVD-ROM / CD-ROM device handling)
~~
For compare, see example "good situation":
See output of dmesg related "ata" Ubuntu v13.04 mini.iso ( without boot parameter reserve=0x1f0, 0x8) :
~~~~
~ # dmesg |grep ata
[ 0.167224] libata version 3.00 loaded.
[ 0.703109] ata_piix 0000:00:07.1: version 2.13
[ 0.703267] ata_piix 0000:00:07.1: Hyper-V Virtual Machine detected, ATA device ignore set
[ 0.703339] ata_piix 0000:00:07.1: setting latency timer to 64
[ 0.704968] scsi0 : ata_piix
[ 0.705713] scsi1 : ata_piix
[ 0.706191] atal: PATA max UDMA/33 cmd 0xlf0 ctl 0x3f6 bmdma 0xffa0 irq 14
[ 0.706194] ata2: PATA max UDMA/33 cmd 0x170 ctl 0x376 bmdma 0xffa8 irq 15
[ 0.868844] atal.00: host indicates ignore ATA devices, ignored
[ 0.869142] ata2.00: ATAPI: Virtual CD, , max MWDMA2
[ 0.871736] ata2.00: configured for MWDMA2
~~~~
===
~ # uname -a
Linux ubuntu 3.7.0-7-generic #15-Ubuntu SUP Sat Dec 15 14:13:08 UTC 2012 x86_64 GNU/Linux
~ # lsmod
hv_netvsc 22769 0
hv_storvsc 17496 3
hv_utils 13569 0
hv_vmbus 34432 3 hv_netvsc,hv_storvsc,hv_utils
~ # blkid
/dev/sr0: LABEL=”CDROM" TYPE="iso9660”
/dev/sda1: LABEL="ARCH_BOOT" UUID="009c2043-4bl7-4f95-al4d-fb8951f95b5d" TYPE="ext2"
===
( only CD-ROM and 1( one) IDE disk connected to ATA)
~~
regarding ata_piix.c patch . . .
As far as i understand this patch , it ignore ATA devices on Hyper-V when PV drivers(CONFIG_HYPERV_STORAGE=y) are enabled.
~~
Yes:
ignore ATA-HDD ( but not ignore ATA CD-ROM ) on Hyper-V when PV drivers(CONFIG_HYPERV_STORAGE=y) are enabled.
~
this patches need be backported:
cd006086fa5d ata_piix: defer disks to the Hyper-V drivers by default
and its prerequisite
db63a4c8115a libata: add a host flag to ignore detected ATA devices
~
~~
P.S.
Are You do this:
==
As temporary solution, increase on 1-2 Gb size all .vhd connected to IDE bus
( but not increase size of partitions inside disks)
==
? fsck write message a-la: "no error in file system" ?
2013-01-24 Answer by Ujjwal Kumar: As a temporary solution looks ok for me, but [ VVM: need true solution ]
P.P.S.
To Ujjwal Kumar :
My e-mail:
ZZZZZZZZZZZZZZZ
please send e-mail to me, in reply I send to You patches to ata_piix ( and *.c before and after patches) , etc.
} on 2013-01-14 -- DoNe

Checking kernel parameters at runtime

I know it is possible to obtain kernel parameters such as semume using /usr/sbin/sysdef, but I am curious as to whether there is a way to obtain these values from a C program without making a system() call.
Can anyone point me in the right direction?

I know it is possible to obtain kernel parameters
such as semume using /usr/sbin/sysdef, but I am
curious as to whether there is a way to obtain these
values from a C program without making a system()
call.
Can anyone point me in the right direction?Are you sure you are posting to the right forum ? This one is for
compilers on Linux.
And you're obviously asking about Solaris interfaces.
Thanks,
Roman.

Y setting kernel parameters in linux and not in windows

Hi Can any one please help me out...
While installing oracle on linux we are setting some kernel parameters But when installing in windows are we setting any kernel parameters...We are not setting any parameters...can any one please explain why r we setting kernel parameters and what is the use of those parameters and why are we not setting any parameters in windows.

probably because linux != windows
anyway, there are still some recommendation you can follow, for example if you want to use more than 2Gb of memory in win32

Unable to set kernel parameters using Reource Control

HI,
I'm trying to install DB2 8.2 on solaris 10.the problem i'm encountering in installation is unable to set MSGMAX and MSGMNB kernel parameters. I tried setting the new replacement parameter process.max-msq-qbytes through projects->Resource Control from the management console.but still uinable to set the parameters.
Can anyone help me in setting the above kernel parameters.
Its not possible to set it thru /etc/system.
thanx
guru

I finally had some time to find the actual syntax for tuning process.max-msq-qbytes and process.max-msg-messages. prctl will change those paramaters for an existing process.
As a proof of concept I changed process.max-msg-messages to a 64k. process 2221 is my shell.
prctl -n process.max-msg-messages -r -v 64k 2221
bash-3.00# prctl 2221
process: 2221: -csh
NAME    PRIVILEGE       VALUE    FLAG   ACTION                       RECIPIENT
process.max-port-events
        privileged      65.5K       -   deny                                 -
        system          2.15G     max   deny                                 -
process.max-msg-messages
        privileged      64.0K       -   deny                                 -
        system          4.29G     max   deny                                 -
process.max-msg-qbytes
        privileged      64.0KB      -   deny                                 -
        system          4.00GB    max   deny                                 -And now to make this persist across reboots...
So long as I'm experimenting, I'll use projadd and add a new project which just includes me and not the rest of the users in the group staff.
bash-3.00# projadd -p 115 -U testuser \
-K "process.max-msg-messages=(priv,64K,deny)" \
-K "process.max-msg-qbytes=(priv,64K,deny)" \
user.me This creates the following /etc/project:
(note the last line is all on one line in the real file minus the \.)
placer% cat /etc/project
system:0::::
user.root:1::::
noproject:2::::
default:3::::
group.staff:10::::
user.me:115::testme::\
process.max-msg-messages=(priv,64000,deny);process.max-msg-qbytes=(priv,65536,deny)After a reboot I checked the values by loging in under my user and running prctl.
placer% prctl $$
process: 419: -csh
NAME    PRIVILEGE       VALUE    FLAG   ACTION                       RECIPIENT
process.max-port-events
        privileged      65.5K       -   deny                                 -
        system          2.15G     max   deny                                 -
process.max-msg-messages
        privileged      64.0K       -   deny                                 -
        system          4.29G     max   deny                                 -
process.max-msg-qbytes
        privileged      64.0KB      -   deny                                 -
        system          4.00GB    max   deny                                 -
process.max-sem-ops
        privileged        512       -   deny                                 -
        system          2.15G     max   deny                                 -
...Solaris 10 has different tunables and default values from 8 and 9. It's default tunables should be good for most applications per a given system's hardware. There are some great blog articles, and discussions on opensolaris.org and blogs.sun.com on tuning that explain the intent of tuning and why we shouldn't have to tune.
Cheers,
~~sa

Calculating Kernel parameters for Oracle 11g R2 db on solaris 10u9

Hi Everyone,
I have query regarding calculating the kernel parameters for deploying oracle 11g R2 db on solaris 10 v 5.10 update 09 machine , we have Ram size of 64gb.
My question is how to calculate shared memory ,shared memory identifiers,semaphores, semaphores identiifiers for creating resource control for the project(user.oracle).
And how to fine out the available semphore values allocated in system..
Thanks in Advance.
Edited by: 898979 on Dec 15, 2011 10:24 PM

Hi;
For those setting mention in installation guide which is already shared previous post.
I suggest also see:
Oracle Database on Unix AIX,HP-UX,Linux,Mac OS X,Solaris,Tru64 Unix Operating Systems Installation and Configuration Requirements Quick Reference (8.0.5 to 11.2) [ID 169706.1]
Regard
Helios

JVM + Linux kernel, can it have faster program execution

Hello, I am a Garo Garabedyan from Sofia, Bulgaria. I study IT and I am a fan of Java programming language. I heard that Java is going Open Source, I want to say you that in my opinion this is a very good move.
I am writing to you about one thought on Java and other languages like it (C# in example) which can become more faster in execution. Let me explain you how.
In linux (i prefer this OS) the kernel capsulates running programs in Virtual Memory jails so they can't address memory space other that they own. This is to make the OSes more secure and run any kind of programs.
But now we got this type of languages where client-programmer can't access the memory directly, instead of it he uses references. I want to encourage you to think in this way. Why we need virtual memory capsulization when we can't access others program memory? So think further. I believe that Java is going to be more popular from now, just imagine that we can run a lot of Java programs on one virtual machine. So in this way we are more faster. Transfering data between programs is going to be only cutting references.
In order to implement this i think that there are few things to be done.
As a fan of Open Source, i want to picture this in linux.
I will try to go from kernel to jvm to recognize the changes:
1)In kernel there should be a not capsulating logic specially for Java programs. The idea is to have every program separated in kernel, so other programs to be able to address them.
2)The JVM should use one garbage collector for the all running programs
3)JVM have to have in itself implementation of communication protocol(s) between programs in one operating system. In order to make java programs connect to other ones with the same interface (it makes me fool to describe this deeper, because i don't know enough in this topic)
The main idea that i want to picture is the ability to make executing programs faster.
I want to populize this way of thinking and will try to connect with Open Source community in order to make this done not only for Java programs but for OpenSource programs with checking the memory access before compilation (with reference checking tools) and run the program not in a virtual memory. Of course this is as hard as i can't imagine is it possible to be done, but i will try to publish this idea.
Thank you for your attention
Garo Garabedyan
http://garabedyan.blogspot.com/search/label/OpenSource

Many criticisms of Xen can be found with a simple Google search. The biggest one seems to be the need to modify guest OS code to make it run properly with Xen, but that is going away as Xen adds support for AMD-V and Intel VT technologies. KVM is coming on strong in the virtualization market now and seems to be the accepted choice.
That said, I'm not sure how you would setup the machine to properly host VMs with KVM.
Also, you may want to Google kexec to research that restarting the kernel without rebooting idea.

Requirements for Linux OEL 5 before upgrade to r12

We are running Oracle E-Business suites 11.5.10.2 on Linux OEL 5 two node vmware environment. I am asking just Linux patches etc not the Oracle side.
1) -I want to verify Linux server ( dbtier and appstier) requirement like checking openmotif version required kernel patches rpm etc. need relevant document.
2)- Is there any new requirement ?
Thanks

Thanks for your help. I followed your documents and verified that my Linux kernel, gcc librareis, openmotif etc are all meeting the requirement. Now my next step is to start installation and configuration for r12 upgrade. Can you please give me document for that purpose.Oracle E-Business Suite Installation Guide Using Rapid Install
http://docs.oracle.com/cd/E18727_01/doc.121/e12842/toc.htm
Oracle E-Business Suite Upgrade Guide Release 11i to 12.1
http://docs.oracle.com/cd/E18727_01/doc.121/e16342/toc.htm
Database Preparation Guidelines for an E-Business Suite Release 12.1.1 Upgrade [ID 761570.1]
Upgrade Advisor: E-Business Suite (EBS) Upgrade from 11.5.10.2 to 12.1.3 [ID 269.1]
R12.1: Oracle Financials Pre-Upgrade Patch - Supplemental List for EBS CUP [ID 1127593.1]
EBS: R12.1 Oracle Financials Recommended Patch Collection (RPC) [ID 954704.1]
Oracle Applications Release Notes, Release 12.1.1 [ID 798258.1]
1) - We are on 11.5.10.2 on Oracle Linux5 two node system, database tier on one side and the rest on other node.
2)- I have already checked the minimum extended support patch level and we are all good.
3)- I am in the middle of OATM process which will be completed in a day. You should be good to go with the upgrade after completing all the tasks above.
Thanks,
Hussein

How to Configure Linux Kernel for Oracle8

Hello :
Could you please tell me How to configure the linux Kernel to
accommodate the SGA ?
I run the ipcs command and didnt list nothing. I already look the
linux library to find out how to set the parameters listed on
page 4 on chapter 2 "setting the enviroment" on the linux
Installation guide for Oracle8 but I couldnt find nothing.
Could you please help me ?
regards
Mauricio Spamer
null

Saif Manzoor (guest) wrote:
: Go to the following site
: http://jordan.fortwayne.com/oracle/
: you will find some tips on configuring the kernel.
: Saif
: Mauricio Spamer (guest) wrote:
: : Hello :
: : Could you please tell me How to configure the linux Kernel to
: : accommodate the SGA ?
: : I run the ipcs command and didnt list nothing. I already
look
: the
: : linux library to find out how to set the parameters listed on
: : page 4 on chapter 2 "setting the enviroment" on the linux
: : Installation guide for Oracle8 but I couldnt find nothing.
: : Could you please help me ?
: : regards
: : Mauricio Spamer
I have the same problem. What I have to do?
Thanks.
Formiga
[email protected]
null

Why Firefox for Android is causing The Linux kernel to send data packets to random sites?

I've recently installed CyanogenMod on my Nexus 5. Shorty after installing CyanogenMod I decided to install Firefox on my device from here:
https://f-droid.org/repository/browse/?fdid=org.mozilla.firefox
Afrer installing it I decided to install a frontend application for IPtabels from here:
https://f-droid.org/repository/browse/?fdid=dev.ukanth.ufirewall
After installing it I blocked some applications from accessing my data networks, including The
Linux kernel. After some hours passed I took a look at the firewall log and I noticed that the firewall
has blocked several data packets from accessing the internet. The log also showed the IP addresses where
the data packets were being sent. I decided to find out to whom these IP adresses belonged. The results were
rather strange. One particular IP belonged to a French ISP, one on the other hand belonged to a Finnish ISP.
Finally I found one IP that made some sense. That IP belonged to Mozilla. However, at this point I couldn't be sure
that Firefox was causing this behaviour. So I did a little test. I re-installed CyanogenMod on my Nexus 7.
I connected my Nexus 7 to my WiFi-network at my home and I installed the same frontend application for IPtables
on my device. I configured the firewall the same way I did for my phone, so The Linux kernel was also blocked
from accessing any data networks. I surfed the web with my device and did some other things with it. I also checked the
firewall log from time to time, and no applications showed up in the log. So I installed Firefox on my device. And immediately
after installing it The Linux kernel was trying to send data packets to the same IP addresses. Now I was almost completely sure
that Firefox was indeed causing this strange behaviour.
Here are some addresses where The Linux Kernel was trying to send data packets:
69.50.225.155
63.245.217.219
72.167.239.239
23.43.139.27
74.125.232.107
193.229.109.41
63.245.217.160
94.23.204.140
Conclusion:
*I downloaded CyanogenMod from the projects official site and I checked the md5sums of the files
I downloaded before I flashed anything onto my device
*I installed all the applications on my devices (including Firefox) from here: https://f-droid.org
*I didn't do anything stupid with my devices so I dont' think that they were infected with malware
*I changed Firefox settings so that it didn't share any data with Mozilla
So I'd like to have some answers to the following questions:
1)Why Firefox is causing the Linux kernel to send data to these IP addresses and is there any way
to turn this "feature" off?
2)Do the other versions of Firefox and other Mozilla software (Thunderbird etc.) also include this form of snooping?

* 69.50.225.155 - belongs to the EFF, you likely have https everywhere installed
* 63.245.217.219 - aus4.vips.phx1.mozilla.com - Extension update check
* 72.167.239.239 - a1plpkivs-v03.any.prod.ash1.secureserver.net - some GoDaddy hosted site - extension?
* 23.43.139.27 - a23-43-139-27.deploy.static.akamaitechnologies.com - I don't know, Akamai is a world leader in geo distributed websites/services
* 74.125.232.107 - Google - search suggestions or malware/phishing protection database updates
* 193.229.109.41 - not registered to any website - searching seems to suggest it is owned by https://en.wikipedia.org/wiki/Elisa_%28company%29 possibly your ISP or Mobile data provider
* 63.245.217.160 - addons-versioncheck-single1.zlb.phx.mozilla.net - extension update check
* 94.23.204.140 - something related to f-droid.com

Checking for kernel lock contention in OEL 5.5

Is there a lockstat utility for Enterprise Linux 5? Or how could I check for kernel lock contention?
I found a lockstat rpm for RHEL and Centos 4 at http://packages.sw.be/lockstat/, but I could not find it in the distribution of version 5?
The rpm package installs, but the command "lockstat on" shows /proc/lockmeter: No such file or directory
I found an interesting document named "Linux Kernel Lock Profiling with LockStat" at:
http://dolavim.us/blog/2007/11/06/linux-kernel-lock-profiling-with-lockstat/
The document outlines the use of /proc/lock_stat, which is a text file - not using a "lockstat" utility.
From what I understand, I have to rebuild the kernel with "CONFIG_LOCK_STAT=y", or wait for kernel 2.6.24 to be released?
Do I have to build a custom kernel to check for lock contention, or are there perhaps other options?
Thanks!
Edited by: Markus Waldorf on Aug 28, 2010 8:55 PM

SQL> SELECT INDEX_NAME,INDEX_TYPE,UNIQUENESS FROM DBA_INDEXES WHERE TABLE_NAME='DATA_DATA';
INDEX_NAME INDEX_TYPE UNIQUENES
CIDX BITMAP NONUNIQUE
VIDX BITMAP NONUNIQUEYou have bitmap indexes here on a table being inserted into. Bitmap Indexes are another source of lock(and deadlock) in OLTP application. You said that the SQLloader was the unique active program but may be you are also triggering another procedure after the load. Procedure in which you might be using also automomous transactions and so on...
Check first if your table is subject to DML operation in a a multi-user concurrent accesss and in which case you have to get rid of those bitmap indexes
http://hourim.wordpress.com/2011/03/14/deadlock-%e2%80%93-part-1-bitmap-index/
Best regards
Mohamed Houri
www.hourim.wordpress.com

MSI 990FXA-GD80 - SATA connector 5-6 not seen by Linux kernel

M-Board: MSI 990FXA-GD80 (UEFI BIOS with factory version E7640 AMSB50, indicated by green label on BIOS chip)
CPU: AMD Phneom II X6 1055T
RAM: 2 x Crucial DDR3 1333MHz 8GB REG/ECC
PSU: Fractal Design Newton R2 1000W PSU
GPU: Asus GeForce EN8600GT Silent/HTDP 512MB
Operating system Linux / kernel 2.6.39-r2
I am in the final stages of providing my new MSI 990FXA-GD80, Socket-AM3+ with all its peripherals.
I have a working main disk with a Linux/Gentoo installation, connected to SATA baoad connector 1 (the disk shows up as sda1) . Now I have added 4 other disks, all for storage purposes.
The disks connected to SATA board connector 2-4 works OK. However, when I connect the 5th disk to SATA connector number 5 it is not seen by the Linux kernel. It is not seen in connector number 6 either. I have checked that the disk itself and its SATA cable is OK by connecting it to SATA connector number 4 (temporarily disconnecting one of the working disks). And it is recognized there and works OK. So there is no faults in the disk and its cable.
What can be the problem? Is there a different SATA controller for connector 5-6 than for connector 1-4? Do I have to enable a different supporting module in the Linux kernel for SATA connector 5-6, than for connector 1-4?

Quote
However, when I connect the 5th disk to SATA connector number 5 it is not seen by the Linux kernel. It is not seen in connector number 6 either.
Do the drives show up anywhere else (UEFI/BIOS Setup, Boot Order etc.)?

Checking Linux Kernel Parameters before installation

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