85 Oracle 10g DBA jobs available on Apply to Database Administrator, Senior Database Administrator, Junior Database Administrator and more! Oracle Architecture Overview 2. Tools and Architecture 3. Creating an Oracle Instance 4. Oracle Physical Architecture and Data Dictionary Views 5. With the introduction of Oracle Database 10g, DBAs will have in their hands one top 20 new Oracle Database 10g features for database administration tasks.
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So, DBAs who take the time to understand the proper application of new Oracle technology to their everyday jobs will enjoy oracle 10g dba time-saving, and ultimately, money-saving new capabilities.
Oracle Database 10g: The Top 20 Features for DBAs
Oracle Database 10g really is that big of a deal for DBAs. Over the new 20 weeks, I will help you through the ins and outs of this powerful new release by presenting what I consider to be the top 20 new Oracle Oracle 10g dba 10g features for database administration tasks.
Datafiles have the following characteristics: One or more datafiles form a logical unit oracle 10g dba database storage called a tablespace. A datafile can be associated with only one tablespace.
Datafiles can be defined to extend automatically when they are full. Data in a datafile is read, as needed, during normal database operation and stored in the memory cache of Oracle Database.
For example, if a user wants to access some data in a table of a database, and if the requested information is not already in the memory cache for the database, then it is read from the appropriate datafiles and stored in memory.
Modified or new data is oracle 10g dba necessarily written to a datafile immediately. To reduce the oracle 10g dba of disk access and to increase performance, data is pooled in memory and written to the appropriate datafiles all at once.
The instance writes redo log buffers to the redo log as quickly and efficiently as possible.
The redo log aids in instance recovery in the event of a system failure. An insufficient amount of memory allocated to the shared oracle 10g dba can cause performance degradation.
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Caches blocks of data retrieved from the database KEEP buffer pool: A specialized type of database buffer cache that is tuned to retain blocks of data in memory for long periods of time RECYCLE buffer pool: A specialized type of database buffer cache that is tuned to recycle or remove block from memory quickly nK buffer cache: One of several specialized database buffer caches designed to hold block sizes different from the default database block size Java pool: This reduces the amount of memory needed and reduces oracle 10g dba processing-time used for parsing and execution planning.
Data dictionary cache[ edit ] The data dictionary comprises a set of tables and views that oracle 10g dba the structure of the database. Oracle databases store information here about the logical and physical structure of the database.
The data dictionary contains information such as: Oracle operation oracle 10g dba on ready access to the data dictionary—performance bottlenecks in the data dictionary affect all Oracle users.
Because of this, database administrators must make sure that the data dictionary cache  has sufficient capacity to cache this data.
Oracle 10g DBA II
Without enough memory for the data-dictionary cache, users see a severe performance degradation. Allocating sufficient memory to the shared pool where the data dictionary cache resides precludes this particular oracle 10g dba problem.
This Oracle OCA DBA exam review training is designed for the practicing Oracle professional but it is useful to anyone interested in learning Oracle 10g database administration. This includes Oracle developers, Oracle DBAs, Oracle web developers and any computer professional who needs to understand the architecture of an Oracle oracle 10g dba.