Kernel Upgrade

KERNEL UPGRADE
Kernel upgrade is the process of replacing the old executable with new executable. 
SAP Kernel Resides in /sapmnt/<SID>/exe (or) /usr/sap/<SID>/SYS/exe/run for 32/64bit Machines.
The need to upgrade the kernel may arise in the following circumstances.

1. Applying of support packages sometimes demand the updated kernel
2. During an SAP OS/DB upgrade (or) patching
3. To fix the bug as per the notes
4.As part of the early watch report SAP recommends. 
we can check the Kernel Version by executing “disp+work” on
<sid>adm user

PROCESS:
1. Stop SAP System, Stop Services (SAPOSCOL, SAP<SID>_00, All
Oracle Services)
Page

2. Backup The Kernel Directory for Rollback in any inconsistencies with the new kernel.                 

3. Check the present kernel Patch level by executing disp+work (or)  login to the system and navigate to system-->status

4. Download the Latest Kernel from SAP Service Market Place (SMP) specific to Release, OS, DB,

Hardware and Unicode/Non-Unicode

Execute the URL www.service.sap.com/patches to download the latest

kernel and specify the S-USERID and Password

Navigate to software Downloads-->support packages and

patches-->My Company Application Components-->Click on

Complimentary Software

Now select the kernel based on 32/64bit and Unicode/Non-Unicode

Select the “Linux on IA32 32bit”

Select the Database Independent and download the kernel files

“SAPEXE_310-20000967.SAR” file and click on add to Download Basket

Click on Oracle to download the database dependent file

Select the Database Dependent and download the kernel files

“SAPEXEDB_310-20000968.SAR” file and click on add to Download

Basket

Download all the files that is mentioned in the above.

After Successfully Downloading the kernel files Uncar the kernel files

as follows

5. Uncar the Executables into kernel with New kernel Directory

Like that uncar all the executables by suing command SAPCAR –xvf <filename.SAR>

6. Copy the executables into existing kernel (because only few of

them are updated) i.e., overwrite the existing kernel executables.

7. Run the below script with the ‘root’ user to get the privileges for

br*tools (./saproot.sh)

8. Restart the services and SAP system i.e., start all the services that

is mentioned in step1.

9. Check the kernel version by executing command ‘disp+work’ in

<sid>adm user/login in to system and check in systemstatus

Execute the command “dpmon” to check whether the system is up &

running (or) not

Kernel Is Updated Successfully