Table of Contents
Can you change block size in Oracle?
You cannot modify the data block size after a database is created. You can only create a new database with the correct block size, export the old database and do a full import into the new database.
Can we change DB block size?
The DB block size is one of the Oracle system parameters. The default DB block size cannot be changed once the database is created, but multiple DB block sizes can be set up to meet the requirement.
What contains SGA?
The SGA contains the following data structures:
- Database buffer cache.
- Redo log buffer.
- Shared pool.
- Java pool.
- Large pool (optional)
- Streams pool.
- Data dictionary cache.
- Other miscellaneous information.
What is the minimum size of an Oracle database Mcq?
Which is the smallest unit of storage in an Oracle database? Data Block is the smallest unit of storage in an Oracle database. Oracle database’s design is also called as Database Schema. 6.
What is Oracle SGA size?
The granule size depends on the database version and sometimes on the operating system. In Oracle 9i and earlier, it is 4 MB if the SGA size is less than 128 MB, and 16 MB otherwise. For later releases, it is typically 4 MB if the SGA size is less than 1 GB, and 16 MB otherwise.
What is the maximum size of a database?
Database Block Size Maximum Operating system dependent; never more than 32KB Database Blocks Minimum in initial extent of a segment 2 blocks Database Blocks Maximum per datafile Platform dependent; typically 222- 1 blocks Controlfiles Number of control files 1minimum; 2or more (on separate devices) strongly recommended Controlfiles
What is the default size of a data block in SQL?
The block size for data warehouses is often 32K (you want many rows to be read at a time) and OLTP systems are often 8K. Most experts recommend an 8K block size. The data block cache for the default block size is set using the DB_CACHE_SIZE initialization parameter.
How to increase the DB_block_size of a database?
You must rebuild the database if you want to increase the DB_BLOCK_SIZE. The block size for data warehouses is often 32K (you want many rows to be read at a time) and OLTP systems are often 8K. Most experts recommend an 8K block size.
What is the best block size for a data warehouse?
The block size for data warehouses is often 32K (you want many rows to be read at a time) and OLTP systems are often 8K. Most experts recommend an 8K block size.