The size of the database is the space the files physically consume on disk. You can find this with:
select sum(bytes)/1024/1024 size_in_mb from dba_data_files
; But not all this space is necessarily allocated.
What is the maximum size of datafile in Oracle?
Each Oracle datafile can contain maximum
4194303 (4 Million) data blocks
. So maximum file size is 4194303 multiplied by the database block size.
What is the maximum size of datafile in Oracle 11g?
The maximum size of the single datafile or tempfile is
128 terabytes (TB)
for a tablespace with 32 K blocks and 32 TB for a tablespace with 8 K blocks.
How do you increase the size of a datafile in Oracle?
You can also use
auto extend feature of datafile
. In this, Oracle will automatically increase the size of a datafile whenever space is required. You can specify by how much size the file should increase and Maximum size to which it should extend. SQL> alter database datafile ‘/u01/oracle/ica/icatbs01.
What is the default block size in Oracle 11g?
The default block size is
8k
in Oracle. This is the most common. Sometimes, people create the database with 16k block size for datawarehouses. You can also find some 32k block size, but less common which means more bugs.
What is max size in tablespace?
A bigfile tablespace contains only one datafile or tempfile, which can contain up to approximately 4 billion ( 2
32
) blocks. The maximum size of the single datafile or tempfile is
128 terabytes (TB)
for a tablespace with 32 K blocks and 32 TB for a tablespace with 8 K blocks. Smallfile (traditional) Tablespaces.
How do I find maximum size of tablespace?
So the right query is: select
TABLESPACE_NAME
, sum(decode(AUTOEXTENSIBLE, ‘YES’, MAXBYTES, BYTES)) MAX_SIZE from DBA_DATA_FILES group by TABLESPACE_NAME; This has been tested on 11g but it should also work on 10g. It gives you the maximum size of each tablespace in bytes.
How do I check my datafile size?
Check the Size of Oracle Database and PDB databases
select sum
(bytes)/1024/1024 size_in_mb
from dba_data_files; Check the total space used by data. select sum(bytes)/1024/1024 size_in_mb from dba_segments; Check the size of User or Schema in Oracle.
How do I know my PGA size?
You can check your overall PGA usage with
the v$pga_target_advice advisory utility or a STATSPACK or AWR report
.
How do I know the size of my Schema?
select OWNER,sum(bytes)/1024/1024/1000 “SIZE_IN_GB” from dba_segments group by owner order by owner; Share via: Facebook.
How do I increase my datafile size?
ALTER TABLESPACE users ADD DATAFILE ‘/u02/oracle/rbdb1/users03. dbf’ SIZE 10M AUTOEXTEND ON NEXT 512K MAXSIZE 250M; The value of NEXT is the minimum size of the increments added to the file when it extends. The value of MAXSIZE is the maximum size to which the file can automatically extend.
How do I resize a tablespace in Oracle?
- alter tablespace table_space_name add datafile ‘/path/to/some/file. dbf’ size Xm; that will add a new file to the existing tablespace. …
- alter database datafile ‘/path/to/some/existing/file. dbf’ resize Xm; …
- alter database datafile ‘/path/to/some/existing/file. dbf’ autoextend on next Xm maxsize Ym;
How can I reduce maximum datafile size in Oracle?
In that case the command you need will be similar to this:
alter database datafile ‘filename’ autoextend on
next 512K maxsize 11G; See the section Enabling and Disabling Automatic Extension for a Data File of the Oracle 12.1 Database Administrator’s Guide.
What is DB cache size?
DB_CACHE_SIZE specifies
the size of the DEFAULT buffer pool for buffers with the
primary block size (the block size defined by the DB_BLOCK_SIZE initialization parameter). The value must be at least 4M * number of cpus * granule size (smaller values are automatically rounded up to this value).
What is DB block size?
DB_BLOCK_SIZE specifies (in bytes) the size of Oracle database blocks. Typical
values are 4096 and 8192
. The value of this parameter must be a multiple of the physical block size at the device level.
What is Db_file_multiblock_read_count?
DB_FILE_MULTIBLOCK_READ_COUNT is one of the parameters you can use to minimize I/O during table scans. It
specifies the maximum number of blocks read in one I/O operation during a sequential scan
. … DSS and data warehouse environments tend to benefit most from maximizing the value of this parameter.
