Posted by Abishek Kathiresan
Introduction:
Hi All, Here we will discuss Scripts related to TEMP TABLESPACE.
To check instance-wise total allocated, total used TEMP for both rac and non-rac
set lines 152
col FreeSpaceGB format 999.999
col UsedSpaceGB format 999.999
col TotalSpaceGB format 999.999
col host_name format a30
col tablespace_name format a30
select tablespace_name,
(free_blocks*8)/1024/1024 FreeSpaceGB,
(used_blocks*8)/1024/1024 UsedSpaceGB,
(total_blocks*8)/1024/1024 TotalSpaceGB,
i.instance_name,i.host_name
from gv$sort_segment ss,gv$instance i where ss.tablespace_name in (select tablespace_name from dba_tablespaces where contents=’TEMPORARY’) and
i.inst_id=ss.inst_id;
Total Used and Total Free Blocks
select inst_id, tablespace_name, total_blocks, used_blocks, free_blocks from gv$sort_segment;
Another Query to check TEMP USAGE
col name for a20
SELECT d.status “Status”, d.tablespace_name “Name”, d.contents “Type”, d.extent_management
“ExtManag”,
TO_CHAR(NVL(a.bytes / 1024 / 1024, 0),’99,999,990.900′) “Size (M)”, TO_CHAR(NVL(t.bytes,
0)/1024/1024,’99999,999.999′) ||’/’||TO_CHAR(NVL(a.bytes/1024/1024, 0),’99999,999.999′) “Used (M)”,
TO_CHAR(NVL(t.bytes / a.bytes * 100, 0), ‘990.00’) “Used %”
FROM sys.dba_tablespaces d, (select tablespace_name, sum(bytes) bytes from dba_temp_files group by
tablespace_name) a,
(select tablespace_name, sum(bytes_cached) bytes from
v$temp_extent_pool group by tablespace_name) t
WHERE d.tablespace_name = a.tablespace_name(+) AND d.tablespace_name = t.tablespace_name(+)
AND d.extent_management like ‘LOCAL’ AND d.contents like ‘TEMPORARY’;
Temporary Tablespace groups
SELECT * FROM DATABASE_PROPERTIES where PROPERTY_NAME=’DEFAULT_TEMP_TABLESPACE’;
select tablespace_name,contents from dba_tablespaces where tablespace_name like ‘%TEMP%’;
select * from dba_tablespace_groups;
Block wise Check
select TABLESPACE_NAME, TOTAL_BLOCKS, USED_BLOCKS, MAX_USED_BLOCKS, MAX_SORT_BLOCKS, FREE_BLOCKS from V$SORT_SEGMENT;
select sum(free_blocks) from gv$sort_segment where tablespace_name = ‘TEMP’;
To Check Percentage Usage of Temp Tablespace
select (s.tot_used_blocks/f.total_blocks)*100 as “percent used”
from (select sum(used_blocks) tot_used_blocks
from v$sort_segment where tablespace_name=’TEMP’) s,
(select sum(blocks) total_blocks
from dba_temp_files where tablespace_name=’TEMP’) f;
To check Used Extents ,Free Extents available in Temp Tablespace
SELECT tablespace_name, extent_size, total_extents, used_extents,free_extents, max_used_size FROM v$sort_segment;
To list all tempfiles of Temp Tablespace
col file_name for a45
select tablespace_name,file_name,bytes/1024/1024,maxbytes/1024/1024,autoextensible from dba_temp_files order by file_name;
SELECT d.tablespace_name tablespace , d.file_name filename, d.file_id fl_id, d.bytes/1024/1024
size_m
, NVL(t.bytes_cached/1024/1024, 0) used_m, TRUNC((t.bytes_cached / d.bytes) * 100) pct_used
FROM
sys.dba_temp_files d, v$temp_extent_pool t, v$tempfile v
WHERE (t.file_id (+)= d.file_id)
AND (d.file_id = v.file#);
Additional checks
select distinct(temporary_tablespace) from dba_users;
select username,default_tablespace,temporary_tablespace from dba_users order by temporary_tablespace;
SELECT * FROM DATABASE_PROPERTIES where PROPERTY_NAME=’DEFAULT_TEMP_TABLESPACE’;
Changing the default temporary Tablespace
SQL> alter database default temporary tablespace TEMP;
Database altered.
To add tempfile to Temp Tablespace
alter tablespace temp add tempfile ‘&tempfilepath’ size 1800M;
alter tablespace temp add tempfile ‘/m001/oradata/SID/temp02.dbf’ size 1000m;
alter tablespace TEMP add tempfile ‘/SID/oradata/data02/temp04.dbf’ size 1800M autoextend on maxsize 1800M;
To resize the tempfile in Temp Tablespace
alter database tempfile ‘/u02/oradata/TESTDB/temp01.dbf’ resize 250M
alter database tempfile ‘/SID/oradata/data02/temp12.dbf’ autoextend on maxsize 1800M;
alter tablespace TEMP add tempfile ‘/SID/oradata/data02/temp05.dbf’ size 1800m reuse;
To find Sort Segment Usage by Users
select username,sum(extents) “Extents”,sum(blocks) “Block”
from v$sort_usage
group by username;
To find Sort Segment Usage by a particular User
SELECT s.username,s.sid,s.serial#,u.tablespace, u.contents, u.extents, u.blocks
FROM v$session s, v$sort_usage u
WHERE s.saddr=u.session_addr
order by u.blocks desc;
To find Total Free space in Temp Tablespace
select ‘FreeSpace ‘ || (free_blocks*8)/1024/1024 ||’ GB’ from v$sort_segment where tablespace_name=’TEMP’;
select tablespace_name , (free_blocks*8)/1024/1024 FreeSpaceInGB,
(used_blocks*8)/1024/1024 UsedSpaceInGB,
(total_blocks*8)/1024/1024 TotalSpaceInGB
from v$sort_segment where tablespace_name like ‘%TEMP%’
To find Total Space Allocated for Temp Tablespace
select ‘TotalSpace ‘ || (sum(blocks)*8)/1024/1024 ||’ GB’ from dba_temp_files where tablespace_name=’TEMP’;
Get 10 sessions with largest temp usage
cursor bigtemp_sids is
select * from (
select s.sid,
s.status,
s.sql_hash_value sesshash,
u.SQLHASH sorthash,
s.username,
u.tablespace,
sum(u.blocks*p.value/1024/1024) mbused ,
sum(u.extents) noexts,
nvl(s.module,s.program) proginfo,
floor(last_call_et/3600)||’:’||
floor(mod(last_call_et,3600)/60)||’:’||
mod(mod(last_call_et,3600),60) lastcallet
from v$sort_usage u,
v$session s,
v$parameter p
where u.session_addr = s.saddr
and p.name = ‘db_block_size’
group by s.sid,s.status,s.sql_hash_value,u.sqlhash,s.username,u.tablespace,
nvl(s.module,s.program),
floor(last_call_et/3600)||’:’||
floor(mod(last_call_et,3600)/60)||’:’||
mod(mod(last_call_et,3600),60)
order by 7 desc,3)
where rownum < 11;
Displays the amount of IO for each tempfile
SELECT SUBSTR(t.name,1,50) AS file_name,
f.phyblkrd AS blocks_read,
f.phyblkwrt AS blocks_written,
f.phyblkrd + f.phyblkwrt AS total_io
FROM v$tempstat f,v$tempfile t
WHERE t.file# = f.file#
ORDER BY f.phyblkrd + f.phyblkwrt DESC;
select * from (SELECT u.tablespace, s.username, s.sid, s.serial#, s.logon_time, program, u.extents, ((u.blocks*8)/1024) as MB,
i.inst_id,i.host_name
FROM gv$session s, gv$sort_usage u ,gv$instance i
WHERE s.saddr=u.session_addr and u.inst_id=i.inst_id order by MB DESC) a where rownum<10;
Check for ORA-1652
show parameter background
cd <background dump destination>
ls -ltr|tail
view <alert log file name>
shift + G —> to get the tail end…
?ORA-1652 —- to search of the error…
shift + N —- to step for next reported error…
I used these queries to check some settings:
— List all database files and their tablespaces:
select file_name, tablespace_name, status
,bytes /1000000 as MB
,maxbytes/1000000 as MB_max
from dba_data_files ;
— What temporary tablespace is each user using?:
select username, temporary_tablespace, default_tablespace from dba_users ;
— List all tablespaces and some settings:
select tablespace_name, status, contents, extent_management
from dba_tablespaces ;
TABLESPACE_NAME CONTENTS EXTENT_MAN STATUS
—————————— ——— ———- ———
SYSTEM PERMANENT DICTIONARY ONLINE
TOOLS PERMANENT DICTIONARY ONLINE
TEMP TEMPORARY DICTIONARY OFFLINE
TMP TEMPORARY LOCAL ONLINE
Now, the above query and the storage clause of the old ‘create tablespace TEMP’ command seem to tell us the tablespace only allows temporary objects, so it should be safe to assume that no one created any tables or other permanent objects in TEMP by mistake, as I think Oracle would prevent that. However, just to be absolutely certain, I decided to double-check. Checking for any tables in the tablespace is very easy
— Show number of tables in the TEMP tablespace – SHOULD be 0:
select count(*) from dba_all_tables
where tablespace_name = ‘TEMP’ ;
Checking for any other objects (views, indexes, triggers, pl/sql, etc.) is trickier, but this query seems to work correctly – note that you’ll probably need to connect internal in order to see the sys_objects view:
— Shows all objects which exist in the TEMP tablespace – should get
— NO rows for this:
column owner format a20
column object_type format a30
column object_name format a40
select
o.owner ,o.object_name
,o.object_type
from sys_objects s
,dba_objects o
,dba_data_files df
where df.file_id = s.header_file
and o.object_id = s.object_id
and df.tablespace_name = ‘TEMP’ ;
Identifying WHO is currently using TEMP Segments
10g onwards
SELECT sysdate,a.username, a.sid, a.serial#, a.osuser, (b.blocks*d.block_size)/1048576 MB_used, c.sql_text
FROM v$session a, v$tempseg_usage b, v$sqlarea c,
(select block_size from dba_tablespaces where tablespace_name=’TEMP’) d
WHERE b.tablespace = ‘TEMP’
and a.saddr = b.session_addr
AND c.address= a.sql_address
AND c.hash_value = a.sql_hash_value
AND (b.blocks*d.block_size)/1048576 > 1024
ORDER BY b.tablespace, 6 desc;
