SQL & PL/SQL :: Row-movement And Fragmentation?
May 29, 2012find out whether the rowmovement option in a partitioned table will cause fragmentation or not?
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SQL & PL/SQL :: Enable Row Movement On IOT?
Nov 11, 2011I have the table is partitioned.
Can I set the table table to "alter table x enable row movement" even when it is index organized table?
How do I know if the table is INDEX ORGANIZED TABLE.
Server Administration :: Enable Row Movement?
Jul 3, 2012I have a job that runs the following commands for each table in a schema.. (I just inherited it ugggg)
alter table ODS.ODS_MONTHLY_MF_AUM enable row movement;
alter table ODS.ODS_MONTHLY_MF_AUM shrink space;
alter table ODS.ODS_MONTHLY_MF_AUM disable row movement;
On occassion I get this error when enabling row movement
ERROR at line 1:
ORA-00054: resource busy and acquire with NOWAIT specified
Other than dealing with apps that depend on ROWID's is there any negative impact to always keeping row movement enabled for tables.
Secondly, does any body have a script that can determine if the space really needs to be shrunk for a table.
Server Administration :: How To Test Row Movement
Sep 6, 2011How to test row movement? I want to a row data reside in two different blocks. how to do the test?
View 13 Replies View RelatedPL/SQL :: Creation Of Stock Movement Report
Nov 8, 2012I want to create a Stock Movement Report of a Health Management System in Oracle Report Builder 6i, as per following columns.
Sr. No Medicine Name Entry Date Opening Stock Stock In Stock Out Stock on-Hand
1 Mefnac DS 14-Aug-2012 50 450 50 450
15-Aug-2012 450 0 100 350
16-Aug-2012 350 50 400 500
Stock-In would be an aggregate sum of purchased quantity against particular medicine in a specific date.
Stock-Out would be an aggregate sum of issued quantity against particular medicne in a specific date.
Exadata :: Compression And Partition Row Movement?
Mar 6, 2013If I have a Partitioned Table set as COMPRESS FOR QUERY/ARCHIVE HIGH what would be the impact when a row in Partition X has to move to Partition Y?
View 3 Replies View RelatedServer Administration :: Enable / Disable Row Movement
Oct 20, 2011for defragment of a table,
after enable it:
alter table test enable row movement;
do i need to:
alter table test disable row movement; ??
How To Remove Fragmentation
Sep 24, 2012I have table of 60 gb(indexes 60gb ) and it is subject to fragmentation around 10gb .
I m going to remove fragmentation . As i know i have three options
1.expdp/impdp .
2.CTAS (create table ........as.......) with parallel option .
3.Moving table into another tablespace with parallel option .
I have 4 physical and 4 logical cores(total 8 cores) on server .
Reports & Discoverer :: Oracle Report Dynamic Text Movement
Jan 11, 2011I have one report requirement like below diagrams, My report having one repeating frame and one dynamic LOGO field. My repeating frame have 2 field say item_no, and item_name. This repeating frame will grow based on the items say min 1 to max 8 items.
My dynamic logo has some min and max movement position, Say in the below diagram my dynamic logo min movement position is line no 6 and max movement position is 9.
Suppose i have only 1 or 2 or 3 or 4 or 5 items then LOGO should fit in the line no 6, if i have 6 items then logo should come in the 7th line, if i have 7 items then logo should come in the 8th line ect.,like that max 8 item will come in the report, if items are 8 then logo should fit in the 9th line number.
----------------
1|*****ITEM1****|
2|**************|
3|**************|
4|**************|
5|**************|
6|*****LOGO*****|-- MIN LOGO POSITION
7|**************|
[code]......
How To Find Table Fragmentation
Jul 22, 2011A query to find the table fragmentation.
View 1 Replies View RelatedTable Space Fragmentation
May 4, 2011I got the error ORA-01653: unable to extend table <OWNER.TABLE_NAME> by <BYTE> in tablespace <TABLESPACE> in my production database. But I could see 4GB of free space available in the tablespace. But this was resolved after increasing the Tablespace size by 1 more GB. So I wanted to know how I can I reclaim the 4GB space ?
While searching in internet I got few tips like there will be a fragmentation in the tablespace, the free space available in the tablespace may not be a continuous block. To avoid this we need to reorganize the tables using ALTER TABLE <TABLE_NAME> MOVE <TABLESPACE>; command.
But in my tablespace there are huge number of tables exists I cannot do reorganization of all the tables. So I need to know how to identify particularly what are the tables has more fragmentation? so that I can go for reorganizing those tables only.
My Database version in 9.2.0.7
Tablespaces are Locally Managed
SQL & PL/SQL :: Removing Table Fragmentation?
Aug 5, 2012To remove fragmentation which is the best method.
First one :
-----------------
1)Created a backup table from the Fragmented table (This table is a partitioned one).
2)Analyzed this table.
3)DROP the Fragmented table
4)Inserted the backuped up data from backup table to the Re-created table.
5)Analyze this table.
Second method
-------------------
1) Create a backup table newly, with PCTFREE =0
2) Inserted the data from Fragmented table ( This is a partitioned table) to backup table
3) Analyzed this table.
4) Truncate Fragmented table
4) Did Exchange partition of Fragmented table with Backup table.
The second method is not found to be removing the Fragmentation. Before the fragmentation was 28% after Second method the fragmentation is still the same. While the first method the fragmentation reduced to 16%.
Query used to find Fragmentation.
select table_name,
round((blocks*8),2) "table size kb",
round((num_rows*avg_row_len/1024),2) "actual data in table kb",
round((blocks*8),2)- round((num_rows*avg_row_len/1024),2) "wasted space kb",
[code]...
Does Update On A Partitioned Column Cause Fragmentation
Apr 11, 2008Does "Update on a Partitioned Column" cause fragmentation ?
See example below :
Suppose I have a table as below that has approx 3 million rows and growing :
1) Table ABC :
file_id number
status_flag varchar2(1)
file_Content clob
date_created date
2) This table is list partitioned on Column "status_flag".
Column "status_flag" can take 3 values "A" or "B" or "C"
3) A file_id can transition from 1 "Status_flag" to another. [ A--> B , C--> B, B-->C, A --> C, etc ]
This means its possible to UPDATE the "status_flag " - the partitioned column.
Question :
-------------
1) Would the movement of rows from 1 partition to another cause fragmentation ?
2) Or Instead, should this be achieved by maintaining 3 tables - 1 each for every "status_Flag" as Table_A, Table_B, Table_C
This would mean that, if file_id 1, changes "status_flag" from 'A' to 'B' :
-- The corresponding row from Table_A will be created in Table_B
--- The same will be deleted from Table_A
This would still cause fragmentation ... with the overhead of Inserting a CLOB column from 1 table to another.
3) How to determine how much percent of the table is fragmented ?
PL/SQL :: Delete Millions Of Rows And Fragmentation
Mar 18, 2013i have deleted 20 lak rows from a table which has 30 lak rows,
and i wanted to release the fragmented space, what is the procedure other than exp/imp or alter table move
and also the recommended way to do this prod env... (coalesce /alter move etc.. )
db version is 11.2
Fragmentation / Defragmentation Of Space In Database
Jul 31, 2012Oracle DB version : 10.2.0.5.0
OS version HP-UX B.11.31 U ia64
DB size : 2TB
We have the above configuration for one of our oracle database. One of our DBA acts like he is only the person on this earth who is managing the process of fragmentation removal from the tablespaces in order to improve the performance and wastage of the space. He performs that task at weekends and takes one-off day extra. I am not sure how the fragmentation removal improves the performance and deallocates the space.
Is it compulsory to perform the rebuild process weekly in order to remove fragmented space from tablespaces? Do we have any other method to automatically re-organize objects occupying waste space?
Why the reuild of indexes using separate tablespace improves performance? is there any specifi reason for it?
SQL & PL/SQL :: Horizontal Fragmentation In Oracle 10g Express Edition?
Feb 28, 2012I want to do horizontal fragmentation of a table say employee. But fragmentation is often related to distributed databases. So i want to ask how can i do this on my single home computer? list out the steps that should be performed. I saw the concept of link but really failed to understand that.
View 14 Replies View RelatedPerformance Tuning :: Remove Table Fragmentation
Dec 29, 2011I have tried below steps for removing the table fregmentation but for some table i am not getting good result here.
1. It will collect the data which are having more than 100MB fragmentation.
select owner,table_name,blocks,num_rows,avg_row_len,round(((blocks*8/1024)),2)||'MB' "TOTAL_SIZE", round((num_rows*avg_row_len
/1024/1024),2)||'Mb' "ACTUAL_SIZE", round(((blocks*8/1024)-(num_rows*avg_row_len/1024/1024)),2) ||'MB' "FRAGMENTED_SPACE" from
dba_tables where owner in('a','b','c','d') and round(((blocks*8/1024)-(num_rows*avg_row_len/1024/1024)),2)
> 100 order by 8 desc;
2. then move the object(table) to the same tablespace.
alter table abc move;
alter table bcd move;
alter table efg move;
3. also rebuild the dependent objects.
alter index abc_PK rebuild online;
4. Then analyze the table which are having more than 100MB of fragmentation.
exec dbms_stats.gather_table_stats('a','abc');
exec dbms_stats.gather_table_stats('b','bcd');
exec dbms_stats.gather_table_stats('c','cdf');
after that when check the table fragmentation, i am getting the same result, which i have collected from the 1st query.
Text :: Query To Determine Index Fragmentation?
Mar 27, 2013Is this the right query to determine index fragmentation ?
SELECT AVG (tfrag)
FROM (SELECT /*+ ORDERED USE_NL(i) INDEX(i DR$TEXT_IDX$X) */
i.token_text,
(1
[code]...
The reason I am asking that before index rebuild it returned 86% but after rebuild (ALTER INDEX .. REBUILD) it returned
96% which does not make sense.
I did try ctx_report.index_stats but it takes more time to run.
Performance Tuning :: Fragmentation Can Reduce Performance In Query Times
Jun 16, 2010I have a question about database fragmentation.I know that fragmentation can reduce performance in query times. The blocks are distributed in many extents and scans process takes a long time. Oracle engine have to locate the address of the next extent..
I want to know if there is any system view in which you can check if your table or index has high fragmentation. If it's needed I will have to re-create, move or rebulid the table or index, but before I want to know if the degree of fragmentation is high.
Any useful script or query to do this, any interesting oracle system view?