var q sapbwfunctionaldesigntemplateSAP R3 Performance Monitoring and Tuning. R3 On Oracle. Reorganize Memory. SAP encourages a buffer hit ratio of at least 9. Dedicate a large amount of memory to the DBBLOCKBUFFER initialization parameter. Spread IO Around. Segregate highly volatile tablespaces such as PSAPSTABD and PSAPBTABD. VBAP, VBUP, and VBEP. Create two copies of each target tablespace to allow for COPY TABLE AS SELECT reorganization. OpenText Vendor Invoice Management. for SAP Solutions Administration Guide This guide describes the technical and functional aspects of administering OpenText. 11480 2546806 10192017. 46208 2450370 1092017. 46248 2450370 1092017. 46366 2450370 1092017. 46288 2461152 1092017. 46089 2465869 1092017. 46784 2497092. Virtual Germany Business Enterprise Senior Consultant fm Job BW. Looking for the right tools for integrating SAP BusinessObjects Lean about SAP Business Explorer SAP BEx, as well as the Web Intelligence WI reporting toolset. Dedicate partition a separate disk controller for writing the archived redo logs. To that mount point isolate high volumes and write activity with exclusive control. Size Redo Logs. Size redo logs so that they switch no more than once every 3. Set the LOGBUFFER initialization parameter large enough to avoid redo log space requests. Buffer tables with many read accesses but with fewer than 1. Display table call statistics from the initial screen, Administration System administration Monitor Performance SetupBuffers Buffers Detail analysis menu Call statistics. On the next screen, make a selection and choose Enter. Sort the display according to the data records called. Position the cursor on an entry in the column Calls under DB activity and choose Sort. The Changes column indicates which tables are being changed most frequently since the system was started. Size Rollback Segments. Rollback segments should be set large enough to avoid snapshot too old messages. SAP Help IsU Device Management Download as PDF File. pdf, Text File. txt or read online. SAP Help IsU Device Management. Technical Manuals Technical Manuals. Content Administrator Guide. Getting Started. Welcome to SAP Data Services Welcome. For example, if a 6. MB rollback segment is large enough to avoid all snapshot too old messages, then allocate the rollback segment with the following code. Freespace Not Needed In blocks. In its table creation data defintion language DDL, SAP uses fixed length CHAR datatypes rather than. VARCHAR variable length character datatype. This is perhaps not all database vendors do not support it. Oracle provides VARCHAR so that it can store data using the actual size of the field rather than. However, because SAP tables are NOT created with VARCHAR datatypes. SAP produces large archived redo logs. So it is not uncommon for large SAP databases to archive many gigabytes of information every hour. Also for efficiency, Oracle performs IO tofrom disk in. KB blocks containing several rows. Oracle accomodates varying actual VARCHAR lengths by reserving a percent of blocks free for expansion. VARCHAR fields. As of SAP 4. SAP tables are defined with PCTFREE1. With default 4. K blocks, the reserved space will equal 4. So any row that has more than 4. I0 looking for free blocks. Ironically, since SAP does not use VARCHAR datatypes, expansion will never occur and the space is wasted. Furthermore, PCTFREE1. SAP table rows are usually quite large up to 1. Thus, Oracle wastes additional IO looking for free blocks which are usually too small anyway. It is usually faster for Oracle to extend into new blocks than to reuse existing blocks, which. IO for Oracle to link and unlink blocks to a freelist of where free blocks are available for use. Therefore, the strategy for SAP is. Set PCTFREE1 very low to turn off freelist linksunlinks altogether. Best yet, create tables with Oracle 1. EXTENT MANAGEMENT LOCAL. Because of large rows and use of LONG RAW within SAPs tables particularly in the CLU tablespace. Oracles default block size to the largest allowed by the Unix operating systems 8. K. would minimize row chaining. SAP tables begin with the letter Z. Burelson 1. 99. 9, pg. SAP 4. 0. SAP delivers all of its tables. PCTUSED4. 0. This setting means that a block must become less than 4. The lower the value for PCTUSED, the less IO the system will have at insert time. A block will be nearly empty before it becomes eligible to accept new rows. As a result, many SAP tables relink blocks onto the freelists. Ive seen cases where changing the table values using the Oracle ALTER TABLE command. PCTUSED so that newly linked blocks have enough room to accept rows. Burelsons pctused. PCTFREE and PCTUSED as a function of the number of rows to store between IOs. Cluster Resequence Tables. When SAP table rows are resequenced in the same physical order as the tables primary key index. Oracle can retrieve together all at once. This situation saves as much as 5. IO with some SAP queries. To identify tables that will benefit from resequencing. SAP primary key indexes i. DBAINDEXES data dictionary view. Just because a table has many extents does not necessarily mean its inefficient. Numerous benchmarks have repeatedly demonstrated that extended tables often outperform tables that reside in a single extent. Due to file size limitations in older Unix systems. SAP tables must be allocated in two gigabyte chunks. This means that any SAP tables that are more than two gigabytes must have more than two extents, since Oracle does not permit an extent to span a datafile. Resequencing can be performed one of several ways. CREATE TABLE AS SELECT CTAS SQL statement. CREATE TABLE vbapsorted TABLESPACE vbapcopy. STORAGE INITIAL 5. M. NEXT 5. 0M. MAXEXTENTS UNLIMITED. PARALLEL DEGREE 4. AS SELECT FROM sapr. ORDER BY mandt, vbe. Oracles exportimport utilities Oracles SQLoader utility Index Optimization. SAP tables are created with a primary key index TABLENAME0. This means that full table index range scans are not needed. This also means that during normal SAP processing does not take advantage of. Oracles parallel query features which make use of SMP Symmetric Multi Processors with multiple independent CPUs sharing a common communication bus. However, SAP applications can take advantage of Oracle Parallel Server OPS services. Oracle instances to read the same database. A Distributed Lock Manager DLM specific to each hard disk manages access from several CPUs. To reduce pinging of data from other clusters. Create large indexes with tablespaces that are twice as large as the index tree. ALTER INDEX indexname REBUILD. TABLESPACE tablespacename. PARALLEL 2. 0 UNRECOVERABLE. STORAGE INITIAL newinitial. NEXT newnext. FREELISTS newfreelistnumber. UNRECOVERABLE avoids the overhead of writing to the redo logs, which nearly double the speed. But these indexes need to be recreated after a roll forward recovery operation.