replace kernel 7.01 with 7.21 or 7.20

[Former Member]

Hello,

Currently, I have ERP 6.0 EhP4 with Kernel 7.01 level194.

Question: should I replace it with kernel 7.20 or 7.21? I have MsSql and Win 64bit Unicode.

Thank you

Chris

[Sriram2009 · Accepted solution]

Hi Chris

We have upgraded the Latest kernel few month back for that I have created the step, Since your system is also on windows I am sharing the steps

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New Kernel Upgrade Steps in SAP system
Note: To implement the latest kernel 7.20 Minimum required NW 7.00 SPS level 14 refer the SAP note 1636252
1.Implement the Sap Note 1222907 - Runtime object with incorrect alignment or apply the   SAP_BASIS level 17

2.Implement the Sap Note 1610716 Correcting runtime objects with incorrect alignment or   Apply the SPS Basis Level 27 Before implementing  the SAP note Kindly follow below steps
2.1 Check the nametab (profile parameter  rsdb/ntab/entrycount to 200000),as mention in the     SAP note 13988023
2.2 Execute the report RUT_NOTE_1610716 as mentioned in the SAP note 1610716
2.3 Implement the SAP note 1610716
2.4 Install the Microsoft Redistributable runtime DLLs VS2010 SP1 as mention in the SAP note     1553465 (executable file avaible in the Sap Kernel file SAPEXE.SAR )

3.Before taking backup stop the SAP service, and then take the backup of exiting kernel   folder (D:\usr\sap\(SID)\SYS\exe\uc\NTAMD64,
4.Copy the new kernel 7.20(Database depend & in depend)  and then restart the Server check   the services and application & System event viewers ( Follow the Sap Note 1636252 under   the sub topic  No 4.2)
5.Install the Latest version of SAP HostAgent  version 7.20 (not on 7.20 Ext)
6.Delete the existing syslog and the    set the profile parameters  ‘rslg/new_layout = 9’      as mention in the Sap note 1636252
7.Only necessary in case of a Dual-Stack system: you must set the following parameter in the   default system profile DEFAULT.PFL:  system/type = DS

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Thanks & Regards

Sriram

[Former Member]

Thank you for your answer. But, 720 or 721?

[Sriram2009]

Hi

Kernel Version 7.20 Ext

Thanks & Regards

Sriram

[Reagan]

Hello

There are certain limitations for Kernel release 7.20 EXT

Check this SAP Note:

Note 1553301 - 7.20 EXT Kernel - Usage

Regards

RB

[bxiv]

Yes you should, newer kernel version offer security fixes\speed enhancements\stability\etc etc; as an example for you a recently built 7.4 Java App server for myself using the 7.40 kernel restarts in under 2 mins (30 - 35 secs shutdown, 50 - 70 secs startup).  Now granted I don't have it doing much yet as its going to replace some older adobe servers in my environment.

[Former Member]

Hello Chris,

Absolutely you can.

Please find beautiful doc on kernel change from 700 to 720REL/720_EXT

http://scn.sap.com/community/netweaver-administrator/blog/2013/05/22/upgrading-sap-kernel-from-relea...

Regards,

Surojit

[Former Member]

Hi,

Yes you can.

thanks

Rishi Abrol

[Reagan]

Good Day

Please check these SAP Notes:

Note 1636252 - Installing a 7.20 kernel in SAP Web AS 7.00/7.01/7.10/7.11

Note 1629598 - SAP Kernel 720 will replace older kernel versions

Regards

RB