To process SQL statements as quickly as possible, the database system uses the following methods, among others:
· Automatic Transformation of SQL Statements
· Calculating the best search strategy for an SQL statement with the SQL Optimizer
The performance of a database instance is significantly influenced by the configuration of the database instance and the structure of the database.
· For good I/O performance, observe the tips for creating and configuring a database instance.
· Make sure you choose appropriate database parameters.
· Update the SQL Optimizer statistics regularly.
· For short access times for data queries, observe the database design tips.
To monitor performance during operation, you can use the Database Analyzer, the Database Manager GUI, the Database Manager CLI and XCONS.
In SAP systems, use the CCMS; see:
· Database Adminstration in CCMS: MaxDB,
¡
Performance
(database assistant)
¡
Performance
(database alert monitor)
· Database Administration in CCMS: SAP liveCache Technology,
¡
Performance
(liveCache assistant)
¡
Performance
(liveCache alert monitor)
See also:
SAP Note 819641