Kernel Upgrade

1.   Kernel contains the re-fix for all executables for SAP and DB                                                     Path: - usr/sap/SID/sys/exe/run

2.   Download the latest kernel based on Unicode, Non-Unicode, OS, DB

3.   Two .sar files will be downloaded

SAPEXEDB – Database Dependent

SAPEXE – Database Independent

4.   Uncar the files using command sapcar –xvf

5.   Stop SAP, DB and services if windows

6.   Take the backup of existing kernel directory

7.   Over write the uncared files to

Usr/sap/SID/sys/exe/run directory

8.   Execute the command (script)

Saproot.ssh

Oraroot.ssh

9.   Start sap

What is the command to start sap after kernel upgrade?

Ø Saproot.ssh

Ø Oraroot.ssh

Ø If system is not coming up check the SAP and DB connection using command r3trans –d

Ø Check the log files like Dev_desp, Dev_W01, W02 etc

Ø Check the permission and can change permission using command CHOWN

If problem come check the below points………..

a.    Check dev_disp and dev_w01….N trace files

b.   Run cleanipc command and try to start

c.    Change the file permission in directory

Usr/sap/SID/sys/exe/run

d.   Sometimes we should change the OPS$ password

e.    Restart the server to clean-up the shared memory

f.     Check R3trans –d to check connection to DB and SAP.

What is the difference between Windows and UNIX kernel upgrade?

          In UNIX we have to run Saproot.ssh and Oraroot.ssh scripts in ROOT user ID.