Re-platforming the E-Business Suite Database

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1 Re-platforming the E-Business Suite Database Ahmed Alomari Performance Specialist Database SIG

2 Agenda Options Case Study Q & A

3 Options

4 Re-platforming Options Transportable DB Transportable Tablespace Oracle GoldenGate with the Extended Datatype Interface Data Pump (Full Export/Import) Re-implementation

5 Re-platforming Options Transportable DB Transportable Tablespace Oracle GoldenGate with the Extended Datatype Interface Data Pump (Full Export/Import) Re-implementation

6

7 Source Configuration Database Size: 11 TB 2 Node RAC Cluster with 12 Application Tier nodes IBM P570 Servers (AIX 5.3) with DB GPFS 7X24 Global Instance 2,000+ DB files ~20 MB/sec RAC traffic 1 TB+ of redo daily Shared Disk EBZPROD1 EBZPROD2 Private Interconnect Public Network App Tier (1) App Tier (2) App Tier (3) App Tier (12)

8 Target Configuration Database Size: 11 TB 4 Node RAC Cluster with12 Application Tier nodes Grid Infrastructure (CRS + ASM) Intel (x86) Linux Servers (64 bit Kernel) Quad Core processors Red Hat Enterprise Linux Server release DB with ASM and then upgraded to 11gR2 DB. Private Interconnect Shared Disk EBZPROD1 EBZPROD2 EBZPROD3 EBZPROD4 Public Network App Tier (1) App Tier (2) App Tier (3) App Tier (12)

9 If Endianness is different, extra steps are needed. Check V$TRANSPORTABLE_PLATFORM Else TransportDB option can be used which is much simpler. In this case, AIX-Based Systems (64-bit)[Big] to Linux x86 (64-bit) [Little] requires file conversions.

10 Ensure source and target systems have the same logical version of the version of the DB home including PSUs and one-off patches. Ensure one-off patches related to Data Pump and RMAN are in sync on both the source and target system. Apply patch for bug

11 Create the violations table exec dbms_tts.transport_set_check() Mark tablespaces in the transport set as readonly excluding RDBMS tablespaces such as TEMP, UNDO, SYSTEM, CTX, SYSAUX, etc.. Create the transport set Drop un-used columns (query dba_unused_col_tabs) Resolve violations. Export tablespace metadata (transport_tablespace option) with statistics. Avoids having to re-gather on target system.

12 Export with the full option and without data Full=y Exclude tables, indexes, constraints, MVs, etc.. Export with the full option to capture all VPD policies Full=y Include=RLS_POLICY Export the system schemas SYS, SYSTEM, ORDSYS, MDSYS, etc.. Note the AQ settings.

13 Export the GTT table definitions. Convert the datafiles using RMAN on the target system using the CONVERT option with PARALLELISM option From platform [AIX-Based Systems (64-bit)] Use db_file_name_convert to remap path names. Create an RMAN script for each set of 20 files and launch multiple rman sessions. Leverage the horsepower of the cluster to launch multiple RMAN sessions on each node. Very I/O intensive so storage performance is key.

14 Entire file conversion process took about 12 hours. Initially took 60+ hours, but after storage tuning and using multiple streams of RMAN, it reduced to 11. The DB file conversion step will take the longest amount of time out of the entire migration. So focus on optimizing this step and test with different numbers of parallelism and number of files per RMAN script to find the optimal settings in your environment.

15 Import TTS metadata into the source system. Exclude PL/SQL units since metadata needs to be imported first. Import datafiles using the TRANSPORT_DATAFILES option Exclude Table and Index statistics to avoid the lengthy step of generating statistics. This optimization alone can save 10+ hours depending on the volume of the DB. Convert the transportable tablespaces on the target DB to read write mode.

16 Update user metadata including default tablespace and quote information. Import PL/SQL units from the full DDL export. Import the VPD policies from the RLS export. Activate the queue tables. Rebuild spatial indexes. Import the system schema and GTTs. Import the schema statistics (saved earlier). Avoids having to re-gather statistics.

17 Post Steps Reset AQs Verify grants and synonyms are in sync. Recompile invalid objects and review list of invalid objects. Compile flex fields and recreate grants/synonyms for Apps. Run the program DQM Staging Program (ARHDQM) to build the DQM indexes.

18 Post Steps Check for missing statistics on Apps related objects including column level statistics. Avoid sub-optimal execution plans prior to releasing the system to the users. Gather System Statistics and Fixed Object Statistics on the target system (do this during a peak period). Fixed object statistics refreshes the statistics on the X$ tables. Stale or non-representative statistics on the fixed objects can result in poor performance of V$ related queries which can impact Applications performance.

19 Post Steps Gather System Statistics and Fixed Object Statistics on the target system (do this during a peak period). Fixed object statistics refreshes the statistics on the X$ tables. Stale or non-representative statistics on the fixed objects can result in poor performance of V$ related queries which can impact Applications performance. For DB upgrades, normally handled by adstats.sql, however, timing of when this is run is key. Run the commands below to refresh the fixed object statistics. Normally takes about minutes depending on CPU speed. exec dbms_stats.delete_fixed_objects_stats; exec dbms_stats.gather_fixed_objects_stats;

20 Post Steps Ensure OS huge pages are being used for the SGA vm.nr_hugepages <SGA size in MB+overhead size>/(2) Ex: vm.nr_hugepages = (80 GB SGA) Ensures SGA memory is pinned and locked. Set memorylock Shell limit to the size of physical memory on each node soft memlock hard memlock Add entry to /etc/rc.d/init.d/ohasd to ensure huge pages are used on DB startup by CRS. ulimit -l unlimited

21 Post Steps Tune message buffer size InterConnect traffic. net.core.rmem_default= net.core.rmem_max= Tune timeout and heartbeat frequency in /etc/sysconfig/o2cb if any OCFS file system is being used. Run AutoConfig on all nodes. For App. servers, ensure an internal node is the last node in the cycle for which AutoConfig is executed. Start Application Services. Change Concurrent Manager affinity.

22 References Note #: Description: Cross Platform Transportable Tablespaces on 11i with 10gR Export/Import DataPump Parameters INCLUDE and EXCLUDE - How to Load and Unload Specific Objects Oracle E-Business Suite Upgrades and Platform Migration Using Transportable Database to migrate Oracle E-Business Suite 11i Using Oracle Database or 11g

23 Question & Answer Thank You for Attending.

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