SAP NetWeaver Programming Dylan Liu 劉兆宏 SAP NetWeaver Technical Consultant &MSN: Dec
SAP NetWeaver Programming ABAP Performance & Tuning
Graph: Performance and Cause
Architecture of the ABAP Application Server
Access Times to the Sap Buffer and the Database
The Dialog Step
Table Buffering: Types
Database architecture
WAS and Database Architecture
Open SQL Keywords and Their Functions KeywordFunction SELECTRead data from database tables. INSERTInsert lines into database tables. UPDATEChange the contents of lines in database tables. MODIFY Insert lines into database tables or change the contents of existing lines. DELETEDelete lines from database tables. COMMIT WORK Confirm all changes made in a database logical unit of work (LUW*). ROLLBACK WORK Undo all changes in a database LUW.
Rule 1: Keep the Hit List Small
Keep the Hit List Small
Keep the Hit List Small: Effects
Rule 2: Minimize the Amount of Transferred Data
Minimize the Amount of Transferred Data
Minimize the Amount of Transferred Data: Effects
Rule 3: Keep the Number of Round Trips Small
Keep the Number of Round Trips Small
Keep the Number of Round Trips Small: Effects
Rule 4: Keep the Cost of the Search Down
Keep the Cost of the Search Down
Reasonable Index Design
Keep the Cost of the Search Down
Keep the Cost of the Search Down: Effects
Rule 5: Remove the Load From the Database
Remove the Load From the Database
Statements that Bypass the Table Buffer
Remove the Load From the Database
Remove the Load From the Database: Effects
Summary There is just one database server Buffers and indices Try to stick to the presented rules: Small hit list Minimize transfers Minimize number of round trips Narrow your search Minimize database load
SAP NetWeaver Programming NetWeaver Programming: Java
SAP NetWeaver provides complete support for Java technology: Before SAP NetWeaver 7.0: J2EE 1.4 From SAP NetWeaver CE 7.1: Java EE 5
What is JCo? SAP's Java middleware, the SAP Java Connector (JCo) allows SAP customers and partners to easily build SAP- enabled components and applications in Java. JCo supports both inbound (Java calls ABAP) and outbound (ABAP calls Java) calls in desktop and (web) server applications
Jco Examples (1)
Jco Examples (2)
Fundamentals of Web Dynpro History: Why the name “Web Dynpro”? Dynpro = ”Dynamic program” Dynpro is SAP‘s legacy technology for interactive UIs (R/2, R/3) programming in ABAP Dynpro‘s are rendered in SAP GUI application Web Dynpro is to combine: “high interactivity” (= dynamic GUI) and “zero installation” (= ubiquitous GUI, e.g. web browser)
Fundamentals of Web Dynpro Minimize coding, maximize design Separate layout and logic Support arbitrary backend system Run on multiple platforms Support reuse of components 508 accessibility support
Web Dynpro Java: Design Time WYSIWYG Editor
Web Dynpro Java: Runtime
SAP NetWeaver Programming Advice on ABAP career
Questions?