In Oracle database, tablespaces are physical storage structures used to store database objects (such as tables, indexes, etc.).
Understanding the size of tablespaces and expanding them in time is an important task in database management.
Here are some suggestions for viewing tablespace sizes and scaling in Oracle databases:
1. Check the table space size
1. Use SQL query
SELECT tablespace_name,
ROUND(SUM(bytes) / 1024 / 1024, 2) AS "Total Size (MB)",
ROUND(SUM(maxbytes) / 1024 / 1024, 2) AS "Max Size (MB)",
ROUND(SUM(user_bytes) / 1024 / 1024, 2) AS "Used Size (MB)",
ROUND(SUM(bytes - user_bytes) / 1024 / 1024, 2) AS "Free Space (MB)"
FROM dba_data_files
GROUP BY tablespace_name;2. Use Enterprise Manager (EM)
Log in to Oracle Enterprise Manager
Navigate to Database -> Storage -> Tablespaces to view tablespace usage
2. Amplify the table space
1. Manually amplify tablespace data files
Tablespace data file location query
SELECT
file_name, tablespace_name, bytes
FROM
DBA_DATA_FILES
ORDER BY tablespace_name , file_name;ALTER DATABASE DATAFILE 'path_to_datafile' RESIZE size_in_megabytes;
where path_to_datafile is the path to the data file and size_in_megabytes is the new file size.
2. Automatically amplify tablespace data files
It can be automatically amplified by setting the AUTOEXTEND property of the tablespace.
ALTER TABLESPACE tablespace_name AUTOEXTEND ON NEXT size_in_megabytes MAXSIZE max_size_in_megabytes;
where size_in_megabytes is the size of each amplification, and max_size_in_megabytes is the maximum size of the tablespace (the maximum will not exceed 32G).
3. Add new tablespace data file
ALTER TABLESPACE tablespace_name ADD DATAFILE 'new_datafile_path' SIZE size_in_megabytes;
This adds a new data file to the tablespace.
Make sure to back up the database before performing any tablespace operations in case of unexpected situations.
Summarize
The above is personal experience. I hope you can give you a reference and I hope you can support me more.