FRAGMENTATION_STATUS

Hi All,
I got this query in ur blog for FRAGMENTATION
SELECT dfsc.tablespace_name tablespace_name,DECODE ( dfsc.percent_extents_coalesced,
100,(DECODE ( GREATEST ((SELECT COUNT (1) FROM dba_free_space dfs WHERE dfs.tablespace_name = dfsc.tablespace_name), 1),1,'No Frag','' ) ),'Possible Honey Comb Frag')
fragmentation_status FROM dba_free_space_coalesced dfsc ORDER BY dfsc.tablespace_name;
and output is as follows
TABLESPACE_NAME FRAGMENTATION_STATUS
XNSX No Frag
XTRD No Frag
XTRX No Frag
XXLODD
XXLODX No Frag
ZFAD No Frag
ZFAX No Frag
i want to know what is the meaning of No Frag and the blank in TABLESPACE_NAME XXLODD
Please help me.
thanks in advance.

NBOSS wrote:
Hi All,
I got this query in ur blog for FRAGMENTATIONI don't know who ur is or why he has a blog, and I don't know what FRAGMENTATION is. Though I do know that many people worry about something they think is fragmentation and it isn't and it doesn't make any performance difference.
What exactly are you trying to discover here?
>
SELECT dfsc.tablespace_name tablespace_name,DECODE ( dfsc.percent_extents_coalesced,
100,(DECODE ( GREATEST ((SELECT COUNT (1) FROM dba_free_space dfs WHERE dfs.tablespace_name = dfsc.tablespace_name), 1),1,'No Frag','' ) ),'Possible Honey Comb Frag')
fragmentation_status FROM dba_free_space_coalesced dfsc ORDER BY dfsc.tablespace_name;
and output is as follows
TABLESPACE_NAME FRAGMENTATION_STATUS
XNSX No Frag
XTRD No Frag
XTRX No Frag
XXLODD
XXLODX No Frag
ZFAD No Frag
ZFAX No Frag
i want to know what is the meaning of No Frag and the blank in TABLESPACE_NAME XXLODD
Please help me.Please help us help you. Are you using LMT tablespaces? What version (exactly, show us the banner) are you on?
It is entirely possible the help you need is "this is leftover from the olden days and misleading."

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Removing Tablespace fragmentation in 10g

i have a problem with a tablespace space that is highly fragmented . It's locally managed with PCT_INCREASE set to 0. How can i reduce the fragmentation in this tablepsace
Free/Used Space Report :
Tablespace                        Used MB    Free MB   Total MB Pct. Free
FRP_I01                            158556      44625     203181         22
select PCT_INCREASE,EXTENT_MANAGEMENT,SEGMENT_SPACE_MANAGEMENT from dba_tablespaces where TABLESPACE_NAME='FRP_I01';
PCT_INCREASE EXTENT_MAN SEGMEN
           0 LOCAL      AUTO
fragmentation report :
select
2 tablespace_name,
3 count(*) free_chunks,
decode(
4    5 round((max(bytes) / 1024000),2),
6 null,0,
7 round((max(bytes) / 1024000),2)) largest_chunk,
8 nvl(round(sqrt(max(blocks)/sum(blocks))*(100/sqrt(sqrt(count(blocks)) )),2),
9 0) fragmentation_index
10 from
11 sys.dba_free_space
12 group by tablespace_name
13 having tablespace_name='FRP_I01'
14 order by
15 2 desc, 1;
TABLESPACE_NAME                FREE_CHUNKS LARGEST_CHUNK FRAGMENTATION_INDEX
FRP_I01                                201         11904               13.56
SELECT   dfsc.tablespace_name tablespace_name,
2           DECODE (
3              dfsc.percent_extents_coalesced,
            100,
4    5              (DECODE (
6                  GREATEST ((SELECT COUNT (1)
7                               FROM dba_free_space dfs
8                              WHERE dfs.tablespace_name = dfsc.tablespace_name), 1),
9                  1,
10                  'No Frag',
11                  'Bubble Frag'
12               )
13              ),
14              'Possible Honey Comb Frag'
15           )
16                 fragmentation_status
17      FROM dba_free_space_coalesced dfsc
18 where dfsc.tablespace_name='FRP_I01'
19 ORDER BY dfsc.tablespace_name;
TABLESPACE_NAME                FRAGMENTATION_STATUS
FRP_I01                        Bubble Frag

yes, i know that. But as per my script this particular tablespace is fragmented and i want to know if some1 can help me out how to defragment it ?
A 100% score indicates no fragmentation at all. Lesser scores verify the presence of fragmentation.The free chunks count column will tell you how many segments of free space are scattered throughout the tablespace.
thanks in advance

A Nice Audit Script

Hi,
I am trying to build yet an other database audit script. Actually my db target are 9i/10g. The goal is to tell if the database respect some standard and good basics practice. I want to be able to parse the result because it have to run on many databases.
- Any suggestions or remarks are welcome
- your scripts (or link to some url) will be tested and welcome
- I may provide you the source script when it will be advanced.
- You may note that i was inspired for the beginning on a script in www.dba-village.com
The actual defined rules are following :
Instance     hiddens parameters
     Events valuated in init.ora
     Spfile unused
     Having no Jvm and Java Pool not set to 0
Difference with v$parameter and spfile
Database     Control file name not following rule name
     Datafile not folliowing rule name
     Redo logs file name not following rule name
     Archivelog file name not following rule name
     Spfile file name not following rule name
     Directories udump, bdump, cdump not following rule name
Tablespace     Tablespace having extents no multiple of db_bloxk_size *db_file_multiblock_read_count
     Tablespace having data and index
     Tablespacfe dictionnary managed
     Tablespace not having uniform extent
     Tablespace empty
     None temporary segment in temporary tablespace
     MaxExtent of system tablespace
Role     Dangerous Role granted
Privilege     Dangerous Privilege Granted
     System user granted on object to application user
     non system user granted to system schema
Schema     Samples schema installed
Segment      Non system segment in tablespace sysaux
     Non system segment in tablespace system
     Lob not in specific tablespace
Objects     Objects having blank in name
     Columns having blank in name
Datafile     Datafile in autoextend mode
     Datafile in autoextend mode without maximum
Schema     Samples schema installed
     User having objects with name like "SYS%'
     User having not default tablespace
     User having not temporay tablespace
Statistics      Statistics with different date on same schema
     Schema without Statistics
Table     Big table, with statistic without index
     Big table, without statistics without index
     Table > 10 go with statistic unpartionned
     Table > 10 go without statistic unpartionned
     Table having more than two unique index
     Little table with statistic having index
     Little table without statistic having index
Index     Index having constraint disabled
     Little table with statistic having index
     Analyzed table but not analyzed index
synonym     Phantom synonym
Data     Type used long, long raw, and char
The actual Draft (1st result) is following :
-- Instance Information --
Cpu_Count 2 | Host_Name CBID5000133
Instance_Name puma | Database_Status ACTIVE
Status OPEN | Startup_Time 02-08-2007 10:14
Version 10.2.0.3.0 | Instance_Role PRIMARY_INSTANCE
Database log mode ARCHIVELOG
Background Dump Dest C:\ORACLE\ADMIN\PUMA\BDUMP
Spfile C:\ORACLE\10.2.0\DATABASE\SPFILEPUMA.ORA
-- Database Space (Mb) 1073 | SGA (Mb) 276 --
-- Nb. Datafiles 5 | Nb. Tempfiles 1 --
Data Buffer Hit ratio 96,0 | Library Buffer Hit ratio 99,9
Dict. Buffer Hit ratio 81,0 | Switch number (last hour) 0
Session number 4 | Active session number 4
Redo size (Kb) 51200
Dba_Tablespaces Status OK | V$Log Status OK
V$Datafile Status OK | V$Tempfile Status OK
V$Recover_File OK | V$Recovery_Log OK
Lock number 0 | Indexes unusable 0
Tablespace in Backup Mode 0 | Tablespace > 90% 3
Jobs Broken 0 | Objects Invalid 0
Shared_Pool Failure 0 | Latch > 1% 5
Trigger Disabled 16 | Constraint Disabled 27
-- More Instance Information --
07_dictionnary_accessibility FALSE Db_Keep_Cache_Size 0
Compatible 10.2.0.3.0 Db_Block_Size 8192
Created 31-07-2007 14:03 Logins ALLOWED
Cursor_Sharing EXACT Sort_Area_Size 65536
Db Name PUMA Dbid 3523213029
Db_Cache_Advice ON Db_File_Multiblock_Read_Count 8
Db_Cache_Size 0 Open_Cursor 300
Db_Domain Null Db_Unique_Name puma
Log_Archive_Format ARC%S_%R.%T Remote_Login_PasswordFile EXCLUSIVE
Open_Mode READ WRITE Logins ALLOWED
Processes 150 Pga_Aggregate_Target 95420416
Sga_Target 289406976 Sga_Max_Size 289406976
Shared_Pool 0 Java_Pool_Size 0
Statistics_Level TYPICAL Job_Queue_Processes 10
Undo_Management AUTO Undo_Retention 900
Undo_Tablespace UNDOTBS1 Nls_Character_Set WE8MSWIN1252
-- Tablespaces --
% Largest
Alloc Used Free Used Nb Free % Ext. Ext. Auto
Content Tablespace Name (Mb) (Mb) (Mb) Space frag Ext.(Mb) Coal. M. Ext.
PERMANENT SYSTEM 480 472 8 98.3 2 7.9 100 LOCAL Yes
SYSAUX 240 234 6 97.7 14 4.8 100 LOCAL Yes
EXAMPLE 100 77 23 77.4 3 19.8 100 LOCAL Yes
USERS 5 3 2 65.0 1 1.8 100 LOCAL Yes
sum 825 787 38 20
TEMPORARY TEMP 20 20 0 100.0 LOCAL Yes
sum 20 20 0
UNDO UNDOTBS1 30 30 0 99.4 3 .1 100 LOCAL Yes
sum 30 30 0 3
Tablespace Fragmentation Details
Tablespace FRAGMENTATION_STATUS
EXAMPLE Bubble Frag
SYSAUX Bubble Frag
SYSTEM Bubble Frag
UNDOTBS1 Bubble Frag
USERS No Frag
* Fragmentation Summary
Database total size: 855MB
Fragmentation total size: 0MB,
that is 0% of total
Table fragmentation size: 0MB,
that is 0% of total
Index fragmentation size: 0MB,
that is 0% of total
* Table Fragmentation Summary by Tablespaces
aucune ligne sélectionnée
* Index Fragmentation Summary by Tablespaces
aucune ligne sélectionnée
============================================================================================
OBJECTS FOR REORGANISATION
============================================================================================
* This script reports the table that is highly fragmented
============================================================================================
ALL OBJECTS WITH NUMBER OF EXTENTS > 500 (except temporary and rollback segments)
============================================================================================
============================================================================================
ALL TABLES WITH PERCENTAGE OF CHAINED ROWS > 0.1% (acceptable < 3%)
============================================================================================
============================================================================================
ALL TABLES WITH FREESPACE/BLOCK > 2*PCTFREE
============================================================================================
============================================================================================
ALL TABLES WITH PERCENTAGE OF EMPTY BLOCKS (ABOVE HWM) > 50% (waisted space)
============================================================================================
============================================================================================
display the table name and column name of the tables that need to be indexed
============================================================================================
TABLE_NAME CONSTRAINT_NAME TABLE_TO_BE_INDEXED COLUMN_TO_BE_INDEXED
CHANNELS COSTS_CHANNEL_FK COSTS CHANNEL_ID
PROMOTIONS COSTS_PROMO_FK COSTS PROMO_ID
REGIONS COUNTR_REG_FK COUNTRIES REGION_ID
COUNTRIES CUSTOMERS_COUNTRY_FK CUSTOMERS COUNTRY_ID
EMPLOYEES DEPT_MGR_FK DEPARTMENTS MANAGER_ID
============================================================================================
lists foreign keys that are missing indexes
on the foreign key columns in the child table. If the index is not in place
share lock problems may occur on the parent table
============================================================================================
Missing Index
HR-> COUNTR_REG_FK(REGION_ID[1]) ***** Missing Index
HR-> DEPT_MGR_FK(MANAGER_ID[1]) ***** Missing Index
SH-> COSTS_CHANNEL_FK(CHANNEL_ID[1]) ***** Missing Index
SH-> COSTS_PROMO_FK(PROMO_ID[1]) ***** Missing Index
SH-> CUSTOMERS_COUNTRY_FK(COUNTRY_ID[1]) ***** Missing Index
-- xx. Objects having blank in name --
Rule xx - MICKY TABLE "test blank"
-- xx. Empty tablespaces
Rule xx - Tablespace MICKY_02 vide
Rule xx - Tablespace MICKY_03 vide
Rule xx - Tablespace MICKY_04 vide
Rule xx - Tablespace MICKY_05 vide
-- xx. Analyzed index but not analyzed table
Rule xx Index SYS_IL0000052024C00022$$ not analyzed but table CUSTOMERS is.
Rule xx Index SYS_IL0000052024C00023$$ not analyzed but table CUSTOMERS is.
Rule xx Index SYS_IL0000052024C00022$$ not analyzed but table CUSTOMERS is.
Rule xx Index SYS_IL0000052024C00023$$ not analyzed but table CUSTOMERS is.
-- xx. Dangerous Privilege Granted
Rule xx -> Grantee PRIVILEGE ADM
Rule xx SCHEDULER_ADMIN CREATE ANY JOB YES
Rule xx WMSYS UNLIMITED TABLESPACE NO
Rule xx XDB UNLIMITED TABLESPACE NO
Rule xx OLAP_DBA CREATE ANY TABLE NO
Rule xx OLAP_DBA LOCK ANY TABLE NO
Rule xx OLAP_DBA ALTER ANY DIMENSION NO
-- xx. Table name and column name of the tables that need to be indexed
Rule xx -> TABLE_NAME CONSTRAINT_NAME TABLE_TO_BE_INDEXED COLUMN_TO_BE_INDEXED
!Rule xx CHANNELS COSTS_CHANNEL_FK COSTS CHANNEL_ID
!Rule xx PROMOTIONS COSTS_PROMO_FK COSTS PROMO_ID
!Rule xx REGIONS COUNTR_REG_FK COUNTRIES REGION_ID
!Rule xx COUNTRIES CUSTOMERS_COUNTRY_FK CUSTOMERS COUNTRY_ID
!Rule xx EMPLOYEES DEPT_MGR_FK DEPARTMENTS MANAGER_ID

Hi, for Oracle 10g you can use the Oracle Policy for custom alerts, then you can monitoring the database from Oracle Database Control.
Regards.

Checking Tablespace Fragmentation...

Folks,
Can someone share a high-end script for Checking Tablespace Fragmentation that shows exact numbers/values?
The one I have shows only yes or no..
Pasting my script below:
Prompt Fragmentation Level in the db
Prompt
TTitle left "*** Fragmentation Level in the db (As of:"xdate ") from mtdb" skip2
SELECT dfsc.tablespace_name tablespace_name,
DECODE (
dfsc.percent_extents_coalesced,
100,
(DECODE (
GREATEST ((SELECT COUNT (1)
FROM dba_free_space dfs
WHERE dfs.tablespace_name = dfsc.tablespace_name),
1),
1,
'No Frag',
'Fragmented'
'Possible Honey Comb Frag'
fragmentation_status
FROM dba_free_space_coalesced dfsc
ORDER BY dfsc.tablespace_name
ttitle off
results:
TABLESPACE_NAME FRAGMENTATION_STATUS
IIS_TABS1 No Frag
IIS_TABS2 No Frag
IIS_TABS3 Fragmented
IIS_TABS4 No Frag
IIS_TABS5 No Frag
regards,
Lily

Can you explain what, exactly, you mean by "tablespace fragmentation"? Assuming you are on a recent version of Oracle and using locally managed tablespaces (LMT's), fragmentation in the sense of having a chunk of space on disk that cannot be reused because it is too small is all but impossible. Technically, it is still possible in a LMT with automatic rather than uniform extent allocation, but it is exceptionally difficult in practice to come up with such a scenario.
Tablespace fragmentation was a potential problem in long-ago days when there were dictionary-managed tablespaces (DMT's) when individual objects could have different extent allocation policies and PCTINCREASE could be specified. The solution back then was to set INITIAL = NEXT = <<some reasonable constant>> and PCTINCREASE = 0 and simulate the uniform extent allocation option of LMTs.
Justin

Fregmentation on LMTs!!!

Hi All,
If this query is OK..then why fregmentation happens on LMTs..as it is almost impossible on LMT..
mostly INDEX tablespaces have fregmentation so as to some data tablespaces..
why is it so?
SELECT dfsc.tablespace_name tablespace_name,
DECODE (
dfsc.percent_extents_coalesced,
100,
(DECODE (
GREATEST ((SELECT COUNT (1)
FROM dba_free_space dfs
WHERE dfs.tablespace_name = dfsc.tablespace_name),
1),
1,
'No Frag',
'Fragmented'
fragmentation_status
FROM dba_free_space_coalesced dfsc
ORDER BY dfsc.tablespace_name
TABLESPACE_NAME FRAGMENTATION_STATUS
DRSYS No Frag
FIN_DATA Fragmented
FIN_IDX Fragmented
INDX Fragmented
INV_DATA No Frag
INV_IDX Fragmented
OTHER_DATA Fragmented
OTHER_IDX No Frag
PAY_DATA Fragmented
PAY_IDX Fragmented
SALE_DATA Fragmented
SALE_IDX Fragmented
SYSTEM No Frag
TESTDATA Fragmented
UNDOTBS1 Fragmented
USERS Fragmented
XDB No Frag
Thanx in Advance!!!
ORA 9.2/WIN 2K SERVER

Hi,
In addition, take a look on this thread below:
Checking Tablespace Fragmentation...
Cheers

FRAGMENTATION_STATUS

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