SAP Note 146289 Parameter Recommendations for 64-Bit SAP KernelNote Language: English Version: 48 Validity: Valid Since 21.12.2010 Summary Symptom The 64-Bit-Kernel for your SAP system has been implemented. The SAP profile parameters must be adjusted. Other terms 64-bit kernel, 64 bit, performance, platform-id Reason and Prerequisites For general recommendations on the configuration of R/3 on large servers(servers with more than 2 GByte of RAM), see R/3 Notes 146528 "Configuration of R/3 on hosts with much RAM". 425207 "SAP memory management, current parameter ranges", 445533 "Lots of extended memory on AIX (64 bit)" and 789477 "Large extended memory on AIX (64-bit) as of kernel 6.20" For SAP profile parameters that are not covered by this note, please refer to R/3 note 103747. Availability and Implementation of the 64-bit kernel See SAP Service Marketplace: http://service.sap.com/platforms or Note 146528 Note that the implementation of the 64-Bit-Kernel must be tested in a test system before implementing the kernel on the production system. Change log: 7.3.1999: 19.4.1999: 25.5.1999: 28.6.1999: 22.9.1999: 16.6.2000: 10.7.2001: 25.5.2002: 26.8.2004: 15.11.2004: 24.02.2005: 12.09.2005: 09.12.2010: First version Questions & Answers Comment on Swap Space 64-bit kernel for R/3 4.5 on HP-UX Reference to R/3 Note 172747 (HP-UX OS parameters) added References to SAP Notes on COMPAQ Tru64-Unix added Note on DB2 UDB for Unix AIX: ES/SHM_USER_COUNT, ES/SHM_SEG_COUNT, AIX DATA segment Add platform-ID for Windows, HP-UX and Linux AIX: Reference to R/3 note 789477 added Add further platform IDs and AIX parameters AIX: abap/heap_area_* limits changed Add platform-ID for OS400 (IBM i) Solution 10.01.2011 Page 1 of 7 On AIX level: Set Soft DATA segment size and Hard DATA segment size to-1 (see SAP Note 323816).20 (64Bit) --------------------------------------------------------------445533 789477 . 6. 217543. Recommendations for COMPAQ Tru64-Unix If you want to allocate 3 GByte of Extended Memory or more.10 GB for every additional 64-bit instance on the same computer) See note 153641 for more information. 2.6D (64Bit) >= 6. 5. 3. 4096 or 8192 (note 835474) 1 6500000 The deafult value of the following parameters is 2000000000 (2GB). There are no restriction or shared memory.Important: Before setting the R/3 profile parameters. (see also SAP note 425207 (32-/64Bit)) SAP Notes for <=4. please check SAP Notes 217351.01.SAP Note 146289 Parameter Recommendations for 64-Bit SAP Kernel 1. They can be changed depending on the HW (RAM) and the configured SWAP Space: ztta/roll_extension abap/heap_area_dia abap/heap_area_nondia abap/heap_area_total 2000000000 (2GB) 2000000000 (2GB) 2000000000 (2GB) 2000000000 (2GB) See SAP Note 425207 for parameter limitations 4. Implement the SAP profile parameters as follows: em/initial_size_MB em/blocksize_KB ztta/roll_first ztta/roll_area 1024 up to 1TB (note 835474) 2048. Question & Answers 10. (Plus approx. please set the HP-UX operating system parameters according to R/3 Note 172747. For Windows 64Bit recommendations see note 88416 For Linux 64Bit recommendations see note 941735 Recommendations for HP-UX: . 8. we recommend at least 20 GByte of swap space. so all buffers sizes can be set very generously (see recommendations for category III in SAP note 103747). When implementing the 64-bit kernel. 217505.2011 Page 2 of 7 . 217507. 7. For AIX recommendations please see the Notes provided below depending on your SAP kernel release. 20 & lower) --different numbers like 576. When shall I use the 64-bit kernel ? The following check list provides a guideline: a) The usage of the 64-bit kernel makes sense for application servers with more than 2 GByte RAM b) There must be 20 GByte swap space available. (You cannot use 32-Bit DB releases Oracle or Informix with the 64-Bit SAP kernel). b) For DB2 UDB for Unix.01. c) For 'IBM DB2 Universal Database for OS/390 and z/OS' (32-bit database software) you can use both.Choose in the menu: System -> Status . d) For 'IBM DB2 for i' you always use the 64-bit SAP kernel.SAP Note 146289 Parameter Recommendations for 64-Bit SAP Kernel 9. Windows. you have to use 64-bit database software together with the 64-bit SAP kernel... c) You must have a development/test system where you can install the 64-bit kernel first.. only (or 32-bit database software together 32-bit SAP kernel). Is is possible to use 64-Bit database software with 32-bit SAP kernel and vice versa? a) For Oracle and Informix. 399 (old PID) Linux for zSeries --389 Linux for IBM POWER --391 Windows i386 560 --Windows IA64 --561 Windows x86_64 --562 Please see information about the avalilability of the R/3-Kernel in the 10. ) and 64-bit SAP kernel (AIX. SUN.).609 or 624 SUN 369 370 Linux i386 387 --Linux IA64 --388 Linux x86_64 --(Note 816097) 390. 32-bit SAP kernel (AIX.See the field "Plattform-ID": Platform 32-bit 64-bit ---------------------------------------------------------------DEC-Alpha --288 HP-UX 272 273. you can use a 64-bit database software together with 64-bit SAP kernel or 32-bit SAP kernel. SUN. 10.40 & higher)--324 OS400(6.2011 Page 3 of 7 . How can I check whether a 64-bit kernel is used (if available) ? . See SAP note 356828. 274 RM600 322 323 AIX 320 324 OS400(6. 11. Linux.. . '7. How can I check whether a 64-bit version of a database is used? a) Informix: Call transaction ST04 -> 'Detail analysis menu' -> 'Onstat commands' -> '-V print version'.SAP Note 146289 Parameter Recommendations for 64-Bit SAP Kernel notes under component XX-SER-SWREL.30.01. (Note: The version given in the ST04 main screen (e. this requires a large swap space. Why does 64-bit SAP system need 20 GByte of Swap Space? Using the 64-bit kernel.less program termination due to memory problems .g. For a 64-bit version.5): Call transaction ST04 -> 'Detail analysis menu' -> 'V$-Tables' -> 'V$Version' If a 64-bit version is used.0.low costs for tuning and configuration effort .2011 Page 4 of 7 . (For running a test system you may configure less swap space. therefore use the menue path given above. 'INFORMIX-OnLine Version 7. after applying SAP Note 182067 15.21C1') may be not correct. It is our opinion that the costs for 20 GByte Sap Space are low in comparison to the reduced time and cost for administration. The output is e. the string '64-bit version' is displayed 13.) b) Oracle (version at least 8.FC3'.24.UC3'. consulting and support. 12. How much Extended Memory is possible with the 64-bit kernel ? Up to 32768 MB. the character after the 2nd dot is an 'F'.) 14. R/3 can address memory much more generously.g. On the other hand. Does the memory consumtion (physical memory) and/or OS paging increase after applying the parameter recommendations in this note? The following issues may lead to an increased paging activity: a) When increasing the EM block size em/blocksize_KB from 1024 to 4096: In simple words: When increasing em/blocksize_KB programs run faster because of a more efficient memory allocation. as in '7.a single set of well-tested R/3 profile parameters for almost all R/3 systems. The benefits are: .less need for error analysis . On the other 10. 2011 Page 5 of 7 . this is a benefit for the users. In normal cases. Header Data Release Status: Released on: Master Language: Priority: Category: Primary Component: Secondary Components: BC-CST-MM Memory Management Released for Customer 23. we recommend that you go back to the parameter settings that you used before (with your 32-bit kernel) but that you stay on your 64-bit kernel. b) When increasing the EM size em/inital_size_MB: In simple words: Increasing em/inital_size_MB reduces the risk that the EM is fully used and work processes have to use PRIV memory. we recommend that you increase parameters step by step (perhaps on one or two instances only). you should check for programs with a large EM consumption (T-Code ST03 -> Detailed -> Extended Memory -> Block List). programs which previously terminated with memory shortage errors will now work on. On the other hand. a very large EM leads to increased paging due to administration overhead (even if a large part of EM is currently not used). However. this may lead to increased memory consumption and thus to increased paging.) If you observe a performance impact due to paging after applying the recommendations from this note. more EM is allocated which may lead to increased paging. On the other hand. The point where paging is performance-critical depends also on the operating system and hardware and is therefore difficult to predict. there is always a risk that an increased paging occurs and leads to a significant performance decrease.12. As a next step.01. In parallel. c) When increasing the quotas ztta/roll_extension and/or abap/heap_area_(non)dia: When increasing the quotas for the individual user contexts. In the first position. (The increase in paging is not linearly dependend from the increase in memory consumption. these three issues do not have any measurable negative impact on the performance of your system.SAP Note 146289 Parameter Recommendations for 64-Bit SAP Kernel hand. This is especially true. if you have "faulty" customer-developed programs or generic query programs with an "unlimied" memory consumption in your systems.2010 07:48:34 English Recommendations/additional info Consulting SV-BO Backoffice Service Delivery Valid Releases 10. 0A/ Windows Attributes 10. and Solaris Installation 64-bit SAP 4.2 and 5.0B/4.0.0B-64bit kernel Ordering 64-bit SAP R/3 4. Linux x86_64.5: UNIX 64-bit Zero administration memory management as of 4.6D Kernel for Solaris 64-bit SAP software SAP R/3 64-bit Kernel on AIX Installation SAP R/3 64-bit kernel for AIX Ordering 64-bit R/3 4.01.5B for ReliantUNIX SAP on HP-UX: OS kernel parameter recommendations Installation SAP R/3 64 bit kernel ReliantUNIX Installation SAP R/3 4.SAP Note 146289 Parameter Recommendations for 64-Bit SAP Kernel Software Component SAP_APPL SAP_APPL SAP_APPL SAP_APPL SAP_BASIS SAP_BASIS SAP_BASIS Release 40 45 46 46C 46 60 70 From Release 40A 45A 46A 46C 46D 610 700 To Release 40B 45B 46B 46C 46D 640 700 and Subsequent X X X X X Related Notes Number 1112627 941735 933778 931024 923610 835474 570375 563060 548845 445533 425207 422467 356828 353110 308375 214122 205074 199008 174089 172747 158709 155355 155135 153641 146528 146248 146218 126137 88416 Short Text SAP on HP-UX: Recommendations for swap and pseudo swap SAP memory management for 64-bit Linux systems SAP ERP 2004 SR1 Installation on RedFlag Linux FAQ: 64-bit platforms for Windows Memory param recommendations for Bank Analyzer 4.2011 Page 6 of 7 .5B for AIX and Oracle Order 64-bit SAP R/3 4.0 64-bit Swap space requirement for R/3 64-bit kernel Configuration of R/3 on hosts with much RAM Installation SAP R/3 4. current parameter ranges DB6: Installation of a 64-bit SAP System DB6: Migrating to 64-bit for AIX.0 64-bit Additions Oracle upgrade to 8.0B for HPUX 11.0B/4.5B-64bit kernel Ordering 64-bit SAP R/3 4.0 More than 32 GB extended memory SAP on Sun Solaris: Swap Space and Paging DB2/390: Configuring application server on Linux for zSeries Internal modes uses more than 2 GB Lots of extended memory on AIX (64 bit) SAP memory management.5B for HPUX 11. SAP Note 146289 Parameter Recommendations for 64-Bit SAP Kernel Attribute Transaction Transaction Transaction Transaction codes codes codes codes Value DB2 ST03 ST04 TIME 10.2011 Page 7 of 7 .01.
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