xviii
■ Resource Manager enhancements for CPU utilization limit
You can use Resource Manager to limit the CPU consumption of a consumer
group. This feature restricts the CPU consumption of low-priority sessions and can
help provide more consistent performance for the workload in a consumer group.
For more information, see "Managing CPU Resources Using Oracle Database
Resource Manager" on page 9-10.
■ New package for Automatic SQL Tuning
The
DBMS_AUTO_SQLTUNE
package is the new interface for managing the Automatic
SQL Tuning task. Unlike the SQL Tuning Advisor package
DBMS_SQLTUNE
, which
requires
ADVISOR
privileges,
DBMS_AUTO_SQLTUNE
requires the
DBA
role.
For more information, see "Configuring Automatic SQL Tuning" on page 17-7.
■ Oracle Orion I/O Calibration Tool Documentation
Oracle Orion is a tool for predicting the performance of an Oracle database
without having to install Oracle or create a database. Unlike other I/O calibration
tools, Oracle Orion is expressly designed for simulating Oracle database I/O
workloads using the same I/O software stack as Oracle. Orion can also simulate
the effect of striping performed by Oracle Automatic Storage Management.
For more information, see "I/O Calibration with the Oracle Orion Calibration
Tool" on page 8-12.
Oracle Database 11g Release 2 (11.2.0.1) New Features in Oracle
Database Performance
The new and updated performance tuning features include:
■ New Automatic Workload Repository (AWR) views
AWR supports several new historical views, including
DBA_HIST_DB_CACHE_
ADVICE
and
DBA_HIST_IOSTAT_DETAIL
.
For more information, see "Using Automatic Workload Repository Views" on
page 5-21.
■ New Automatic Workload Repository reports
New AWR reports and AWR Compare Periods reports have been added for Oracle
Real Application Clusters (Oracle RAC).
For more information, see "Generating Automatic Workload Repository Reports"
on page 5-22 and "Generating Automatic Workload Repository Compare Periods
Reports" on page 5-28.
■ Table annotation support for the client result cache
The client result cache supports table annotations.
For more information, see "Using Result Cache Table Annotations" on page 7-61.
■ Enhancement to the
RESULT_CACHE
annotation for PL/SQL functions
In Oracle Database 11g Release 1 (11.1), PL/SQL functions that performed queries
referencing annotated tables required the
RELIES_ON
clause. This clause has been
deprecated and is no longer required.
■ Hints specifying parallelism at the statement level
The scope of the parallel hints has been extended to include the statement level.