Tablespace Information
October 29th, 2009 by
sysdba
Here are some scripts related to Tablespace Information .
Information
TABLESPACE INFORMATION NOTES:
Tablespace Name – Name of the tablespace
Initial Extent – Default initial extent size
Next Extent – Default incremental extent size
Min Extents – Default minimum number of extents
Max Extents – Default maximum number of extents
PCT Increase – Default percent increase for extent size
Status – Tablespace status: ONLINE, OFFLINE, or INVALID (tablespace has been dropped)
Contents – Type of tablespace. This column will have ‘TEMPORARY’ (v7.3+) for dedicated temporary tablespaces, and ‘PERMANENT’ for tablespaces that can store both temporary sort segments and permanent objects.
select TABLESPACE_NAME,
INITIAL_EXTENT,
NEXT_EXTENT,
MIN_EXTENTS,
MAX_EXTENTS,
PCT_INCREASE,
STATUS,
CONTENTS
from dba_tablespaces
order by TABLESPACE_NAME
Coalesced Exts
WAIT STATISTIC NOTES:
Tablespace Name – Name of tablespace
Total Extents – Total number of free extents in tablespace
Extents Coalesced – Total number of coalesced free extents in tablespace
% Extents Coalesced – Percentage of coalesced free extents in tablespace
Total Bytes – Total number of free bytes in tablespace
Bytes Coalesced – Total number of coalesced free bytes in tablespace
Total Blocks – Total number of free oracle blocks in tablespace
Blocks Coalesced – Total number of coalesced free Oracle blocks in tablespace
% Blocks Coalesced – Percentage of coalesced free Oracle blocks in tablespace
select TABLESPACE_NAME,
TOTAL_EXTENTS,
EXTENTS_COALESCED,
PERCENT_EXTENTS_COALESCED,
TOTAL_BYTES,
BYTES_COALESCED,
TOTAL_BLOCKS,
BLOCKS_COALESCED,
PERCENT_BLOCKS_COALESCED
from dba_free_space_coalesced
order by TABLESPACE_NAME
Usage
TABLESPACE USAGE NOTES:
- Tablespace Name – Name of the tablespace
- Bytes Used – Size of the file in bytes
- Bytes Free – Size of free space in bytes
- Largest – Largest free space in bytes
- Percent Used – Percentage of tablespace that is being used – Careful if it is more than 85%
select a.TABLESPACE_NAME,
a.BYTES bytes_used,
b.BYTES bytes_free,
b.largest,
round(((a.BYTES-b.BYTES)/a.BYTES)*100,2) percent_used
from
(
select TABLESPACE_NAME,
sum(BYTES) BYTES
from dba_data_files
group by TABLESPACE_NAME
)
a,
(
select TABLESPACE_NAME,
sum(BYTES) BYTES ,
max(BYTES) largest
from dba_free_space
group by TABLESPACE_NAME
)
b
where a.TABLESPACE_NAME=b.TABLESPACE_NAME
order by ((a.BYTES-b.BYTES)/a.BYTES) desc
Users Default (SYSTEM)
SYSTEM TABLESPACE USAGE NOTES:
Username – Name of the user
Created – User creation date
Profile – Name of resource profile assigned to the user
Default Tablespace – Default tablespace for data objects
Temporary Tablespace – Default tablespace for temporary objects
Only SYS, SYSTEM and possibly DBSNMP should have their default tablespace set to SYSTEM.
select USERNAME,
CREATED,
PROFILE,
DEFAULT_TABLESPACE,
TEMPORARY_TABLESPACE
from dba_users
order by USERNAME
Objects in SYSTEM TS
OBJECTS IN SYSTEM TABLESPACE NOTES:
Owner – Owner of the object
Object Name – Name of object
Object Type – Type of object
Tablespace – Tablespace name
Size – Size (bytes) of object
Any user (other than SYS, SYSTEM) should have their objects moved out of the SYSTEM tablespace
select OWNER,
SEGMENT_NAME,
SEGMENT_TYPE,
TABLESPACE_NAME,
BYTES
from dba_segments
where TABLESPACE_NAME = 'SYSTEM'
and OWNER not in ('SYS','SYSTEM')
order by OWNER, SEGMENT_NAME
Freespace/Largest Ext
FREE, LARGEST, & INITIAL NOTES:
Tablespace – Name of the tablespace
Total Free Space – Total amount (bytes) of freespace in the tablespace
Largest Free Extent – Largest free extent (bytes) in the tablespace
select TABLESPACE_NAME,
sum(BYTES) Total_free_space,
max(BYTES) largest_free_extent
from dba_free_space
group by TABLESPACE_NAME
