Books for you

Job Queue
Provides a scheduler service used to schedule user PL/SQL statements or procedures
in batch.
54 | Chapter 2: Oracle Architecture
Queue Monitor (QMNn)
Monitors Oracle Streams message queues with up to 10 monitoring processes
supported.
Automatic Storage Management (ASM) processes
RBAL coordinates rebalancing of activities for disk groups. ORBn performs the
actual rebalancing. ASMB provides communication between the database and
the ASM instance.
The Data Dictionary
Each Oracle database includes a set of metadata that describes the data structure
including table definitions and integrity constraints. The tables and views that hold
this metadata are referred to as the Oracle data dictionary. All of the components
discussed in this chapter have corresponding system tables and views in the data dictionary
that fully describe the characteristics of the component. You can query these
tables and views using standard SQL statements. Table 2-1 shows where you can
find some of the information available about each of the components in the data
dictionary.


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