REBUILD INDEXES IN OFFLINE MODE

hi all
we got SQL 2012 enterprise edition on our production server, As our frag levels are more we are planning to do defragmentation but when we scheduled rebuild indexs last time this ran for 7-8hrs and drive spaces decreased rapidly so we have killed
the process in the middle. I heard that offline indexes will be the better solution as it will be done quickly and keeping in simple recovery prevents the log file increase. could some one tell me how to schedule maintenance plan for rebuild with
offline mode in sql 2012 enterprise edtion or some other efficient way.
proposed plan for rebuilding->take full backup for DB
change recovery model to simple
configure m plan with offline mode
change to full after the plan finished
run dbcc update usage
take full backup after all done
could you please help me in this by letting me know is this correct way to do and how to configure plan which rebuils in offline mode
with regards,
ram.

->setting recovery model from full to simple is to save the disk space, as log will not increase
->As of now we are not taking any T-log backup due to some internal issues so there will be no issue with log chain break
Frankly, I get scared. OK, I don't know what your system is doing, and what your SLA is saying, but someone is paying a lot of money to use Enterprise Edition. But you are not taking log backups? I can only hope that your system does not have a disaster,
because if you have and you are not able to restart the business, you need to be in a country with very high labour security to not lose your job.
->won't the DB files size increase wen we do this bulk logged
Obviously, if you are not taking log backups, the log file file will keep growing, but it will grow less in bulk-logged recovery. On the other hand, the log backups - had you taken any - will be larger.
Please correct me If iam wrong, could you please tell me the procedure for REBUILD IN OFFLINE MODE through maintenance plan.
If you are talking about the maintenance plans you see in SSMS, I only have one advice: don't use them. Instead go to
http://ola.hallengren.com
for an enterprise solution.
Erland Sommarskog, SQL Server MVP, [email protected]

Similar Messages

Automatically sync index in batch mode (w/o ctxsrv)

Didn't find a way to rebuild the index in batch mode every 3 Minutes.
Tried this, which generated error in Oracle:
begin
execute immediate 'alter index vocdev.ua_text_ctx_idx rebuild online parameters(''sync'');';
end;
as a stored procedure, which should be called by the ora_snp0_ORCL process.
May be this kind of dynamic SQL is not allowed. But how can I achieve a solution?
Why isn't there a stored procedure like
CTX_DDL.REFRESH_INDEX('myschema.myindex')
PS: I'm using 8.1.5 on Solaris.
null

Now I found an answer.
-- NOTE: bug # 941367 prevents this from working at 8.1.5.
-- It is fixed in 8.1.6.
create or replace procedure sync
is
begin
execute immediate
'alter index dml_text rebuild online' | |
' parameters ( ''sync'' )' ;
execute immediate
'alter index dml_text rebuild online' | |
' parameters ( ''optimize full maxtime unlimited'' )' ;
end sync;
Looks like we have to upgrade to 8.1.6.
null

Domain creation using WLST offline mode

Hi,
We are migrating from WL8.1SP5 to WL10MP2. After reading through the various options (WLST online, WLST offline, WLST.configToScript(), and Configuration Wizard) , I have concluded that we will use WLST in offline mode to create domains in our prod, qa, and dev environments. In 8.1 I had a silent script that would create domains for me repeatedly in any environment very easily. I want to map this script into the corresponding SOME_NAME.py script to be used for WL10MP2 domain.
I have the BEA provided basicWLSDomain.py (please see below) script. I have difficulty in understanding more than half of that script! I know the basic concept is to traverse the MBean tree and creat and/or set parameters. But I do not know which MBean I will need to modify/create.
Example 1:
readTemplate("C:/bea/wlserver_10.0/common/templates/domains/wls.jar")
cd('Servers/AdminServer')
Q1] I went through http://e-docs.bea.com/wls/docs90/wlsmbeanref/core/index.html but could not find either ServersMBean or AdminServerMBean.
Example 2:
cd('/')
create('myJMSServer', 'JMSServer')
cd('/')
create('myJmsSystemResource', 'JMSSystemResource')
cd('JMSSystemResource/myJmsSystemResource/JmsResource/NO_NAME_0')
Q2] What is a JMSSystemResource? (If I remember correctly, there is no such thing in WL8.1)
Q3] What is JmsResource?
Example 3:
cd('/')
create('myDataSource', 'JDBCSystemResource')
cd('JDBCSystemResource/myDataSource/JdbcResource/myDataSource')
create('myJdbcDriverParams','JDBCDriverParams')
cd('JDBCDriverParams/NO_NAME_0')
set('DriverName','com.pointbase.jdbc.jdbcUniversalDriver')
set('URL','jdbc:pointbase:server://localhost/demo')
set('PasswordEncrypted', 'PBPUBLIC')
set('UseXADataSourceInterface', 'false')
create('myProps','Properties')
cd('Properties/NO_NAME_0')
create('user', 'Property')
cd('Property/user')
cmo.setValue('PBPUBLIC')
cd('/JDBCSystemResource/myDataSource/JdbcResource/myDataSource')
create('myJdbcDataSourceParams','JDBCDataSourceParams')
cd('JDBCDataSourceParams/NO_NAME_0')
set('JNDIName', java.lang.String("myDataSource_jndi"))
cd('/JDBCSystemResource/myDataSource/JdbcResource/myDataSource')
create('myJdbcConnectionPoolParams','JDBCConnectionPoolParams')
cd('JDBCConnectionPoolParams/NO_NAME_0')
set('TestTableName','SYSTABLES')
Q4] Can you please explain the above snippet line by line?
Q5] Why are certain attributes set like this --- set('TestTableName','SYSTABLES') while certain attributes like below are set like this -- myq.setJNDIName('jms/myqueue')?
Example 4:
myq=create('myQueue','Queue')
myq.setJNDIName('jms/myqueue')
myq.setSubDeploymentName('myQueueSubDeployment')
cd('/')
cd('JMSSystemResource/myJmsSystemResource')
create('myQueueSubDeployment', 'SubDeployment')
Q6] What us a SubDeployment?
I apologize for the long question. I would greatly appreciate any help!
Thanks!
Edited by: user10045656 on Oct 29, 2008 11:03 AM
Edited by: user10045656 on Oct 29, 2008 11:06 AM

1 - What is the best way to create a schema, for reporting application, during automated domain build process as we need to create new domains from the script and also be able to start and deploy applications on it. which will also require to have db schema for reporting application.
My suggestion would be to execute the scripts under /neelapu/bea/post31/RC4-samples/osb_10.3/dbscripts/oracle/*.sql with your automated process. OSB requires two simple tables WLI_QS_REPORT_DATA and WLI_QS_REPORT_ATTRIBUTE.
If reporting is not required then we can modify (I guess) in wlst offline mode to delete the below applications from domain.
<app-deployment>
<name>JMS Reporting Provider</name>
<target>osb_server1</target>
<module-type>ear</module-type>
<source-path>/neelapu/bea/xyz/load4/Oracle_OSB1/lib/common/jmsreportprovider.ear</source-path>
<deployment-order>125</deployment-order>
<security-dd-model>DDOnly</security-dd-model>
</app-deployment>
<app-deployment>
<name>Message Reporting Purger</name>
<target>osb_server1</target>
<module-type>ear</module-type>
<source-path>/neelapu/bea/xyx/load4/Oracle_OSB1/lib/common/msgpurger.ear</source-path>
<deployment-order>126</deployment-order>
<security-dd-model>DDOnly</security-dd-model>
</app-deployment>
Thanks
Manoj

Rebuilding indexes after importing...

My coworker and I are discussing whether it is necessary, or advised, to rebuild indexes after an import of the schema.
My thinking is that the index data is put into fresh blocks thereby creating a very flat index tree without any fragmentation.
But my coworker suspects that perhaps the blocks are built exactly as they existed in the source database.
I could understand, perhaps, if the refresh were done by using RMAN which copies block by block, but even then I'm not sure.
Can you help us understand this please?
Thanks.
Ed

Hi,
Normally, the indexes are build and statistics upfated after the import automatically. You do not ned to generate the statistics after the import until unless you are running very old version of database.
Regards
[sfa-dev1:oracle:10.2.0] $ imp help=Y
Import: Release 10.2.0.4.0 - Production on Fri Nov 13 11:49:56 2009
Copyright (c) 1982, 2007, Oracle. All rights reserved.
You can let Import prompt you for parameters by entering the IMP
command followed by your username/password:
Example: IMP SCOTT/TIGER
Or, you can control how Import runs by entering the IMP command followed
by various arguments. To specify parameters, you use keywords:
Format: IMP KEYWORD=value or KEYWORD=(value1,value2,...,valueN)
Example: IMP SCOTT/TIGER IGNORE=Y TABLES=(EMP,DEPT) FULL=N
or TABLES=(T1:P1,T1:P2), if T1 is partitioned table
USERID must be the first parameter on the command line.
Keyword Description (Default) Keyword Description (Default)
USERID username/password FULL import entire file (N)
BUFFER size of data buffer FROMUSER list of owner usernames
FILE input files (EXPDAT.DMP) TOUSER list of usernames
SHOW just list file contents (N) TABLES list of table names
IGNORE ignore create errors (N) RECORDLENGTH length of IO record
GRANTS import grants (Y) INCTYPE incremental import type
INDEXES import indexes (Y) COMMIT commit array insert (N)
ROWS import data rows (Y) PARFILE parameter filename
LOG log file of screen output CONSTRAINTS import constraints (Y)
DESTROY overwrite tablespace data file (N)
INDEXFILE write table/index info to specified file
SKIP_UNUSABLE_INDEXES skip maintenance of unusable indexes (N)
FEEDBACK display progress every x rows(0)
TOID_NOVALIDATE skip validation of specified type ids
FILESIZE maximum size of each dump file
STATISTICS import precomputed statistics (always) On 10gR2
Edited by: skvaish1 on Nov 13, 2009 11:50 AM

What is the difference between the drop and create the index and rebuild index ?

Hi All,
what is the difference between drop and create index & rebuild index ? i think both are same...Please clarify if both are same or any difference...
Thanks in Advance,
rup

Both are same. Rebuilding an index drops and re-creates the index.
Ref:
SSMS - https://technet.microsoft.com/en-us/library/ms187874(v=sql.105).aspx
TSQL - https://msdn.microsoft.com/en-us/library/ms188388.aspx
I would suggest you to also refer one of the best index maintenance script as below:
https://ola.hallengren.com/sql-server-index-and-statistics-maintenance.html

REBUILD INDEX vs DROP/CREATE INDEX

Hi there,
Does anyone has already got some performance degradation after REBUILD INDEXes ? Would it be better to perform DROP/CREATE INDEX instead ?
Thank you very much for anu reply.
Best regards,
Helena

Hi,
>>so is it then better to DROP/CREATE them ?
Well, In fact I learned that when you rebuild an index, Oracle creates a new index from the old index and does not perform sorting while building the new index, which results in performance enhancement. In this case, depending of the size of your data it's necessary sufficient space on a tablespace for storing the old as well as the new index (while creating the new index). Other advantage, is that Oracle can use the old index for answering queries while it builds the new index too using [alter index <index_name> rebuild online].
Cheers

Rebuild Index VS Drop and Rebuild?

Hey all,
I am currently redesigning a weekly process (weekly coz we pre determined the rate of index fragmentation) for specific indexes that get massive updates. The old process has proved to be able to fix and maintain reports performance.
In this process we rebuild specific indexes using the below command:
Alter index index_name rebuild online;
This command takes around 10 min for selected indexes.
Testing the below took 2 min for 6 or 7 indexes.
Drop Index Index_Name;
Create Index Index_Name on Table_name (Col1, col, ..);
I know that indexes might not be used, and the application performance would be degraded with stale or non-existent stats. But our production and all our test DBs have procedures that daily gather stats on them.
I tested the below script to make sure that execution plan does not change:
SELECT ProductID, ProductName, MfrID FROM PRODUCT WHERE MFRID = 'Mfr1';
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)|
| 0 | SELECT STATEMENT | | 37 | 3737 | 13 (0)|
| 1 | TABLE ACCESS BY INDEX ROWID| PRODUCT | 37 | 3737 | 13 (0)|
| 2 | INDEX RANGE SCAN | PRODUCT_X1 | 37 | | 3 (0)|
dropping PRODUCT_X1 and recreating it only changed the cost to 12.
Gathering the stats again took the cost to 14.
No performance issues were faced and index was still used.
My question is: Is there any oracle recommendation that requires rebuilding the index instead of dropping and recreating it?
Is there any side effect to my approach that I did not consider?
Thank you

Charlov wrote:
I am currently redesigning a weekly process (weekly coz we pre determined the rate of index fragmentation)Nice. Not only have you defined and located index fragmentation but have also measured the rate at which it occurs.
Could you please share your definition of index fragmentation, how you detect it, and how you measure the rate of change of this fragmentation.
I am curious about all this since it can be repeatedly shown that Oracle btree indexes are never fragmented.
http://richardfoote.files.wordpress.com/2007/12/index-internals-rebuilding-the-truth-ii.pdf
The old process has proved to be able to fix and maintain reports performance.Great so you have traces and run time statistics from before and after the rebuild that highlight this mysterious fragmentation and show how the fragmentation caused the report to be slow, details what effects the rebuild had that caused the reports to perform better.
Please share them as these would be an interesting discussion point since no one has been able to show previously how an index rebuild caused a report to run faster or even show the fragmentation that caused it to be slow in the first place.
I mean it would be a pity if the report was just slow because of an inefficient plan and compressing an index or two that probably shouldn't be used in teh first place appears to temporarily speed it up. Could you imagine rebuilding indexes every week, because some developer put the wrong hint in a query? That would be pretty funny.

"analyze index" vs "rebuild index"

Hi,
I don't undestand the difference between "analyze index" and "rebuild index".
I have a table where I do a lot of "insert" and "update" and "query", What is the best thing to do ??
thanks
Giordano

When you use dbms_stats.gather_schema_stats package with cascade=>true option, you are also collecting stats for the indexes, no need to collects stats separately using dbms_stats.gather_index_stats.Of course, but I refered to the rebuild index question. Therefore I only mentioned the GATHER_INDEX_STATS.
Auto_sample_size has many problems/bugs in 9iOk didn't know that - I'm using 10gR2.
But this discussion made me curious. So I tried something (10gR2):
CREATE TABLE BIG NOLOGGING AS
WITH GEN AS (
SELECT ROWNUM ID FROM ALL_OBJECTS WHERE ROWNUM <=10000)
SELECT V1.ID,RPAD('A',10) C FROM GEN V1,GEN V2
WHERE ROWNUM <=10000000;
SELECT COUNT(*) FROM BIG;
COUNT(*)
10000000
So I had a Table containing 10 Million rows. Now I indexed ID:
CREATE INDEX BIG_IDX ON BIG(ID)
I tested two different methods:
1.) GATHER_TABLE_STATS with estimate 10%
EXEC DBMS_STATS.GATHER_TABLE_STATS(TABNAME=>'BIG',OWNNAME=>'DIMITRI',CASCADE=>TRUE,ESTIMATE_PERCENT=>10);
It took about 6 seconds (I only set timing on in sqlplus, no 10046 trace) Now I checked the estimated values:
SELECT NUM_ROWS,SAMPLE_SIZE,ABS(10000000-NUM_ROWS)/100000 VARIANCE,'TABLE' OBJECT FROM USER_TABLES WHERE TABLE_NAME='BIG'
UNION ALL
SELECT NUM_ROWS,SAMPLE_SIZE,ABS(10000000-NUM_ROWS)/100000 VARIANCE,'INDEX' OBJECT FROM USER_INDEXES WHERE INDEX_NAME='BIG_IDX';
NUM_ROWS SAMPLE_SIZE VARIANCE OBJEC
9985220 998522 ,1478 TABLE
9996210 999621 ,0379 INDEX
2.) GATHER_TABLE_STATS with DBMS_STATS.AUTO_SAMPLE_SIZE
EXEC DBMS_STATS.DELETE_TABLE_STATS(OWNNAME=>'DIMITRI',TABNAME=>'BIG');
EXEC DBMS_STATS.GATHER_TABLE_STATS(TABNAME=>'BIG',OWNNAME=>'DIMITRI',CASCADE=>TRUE,ESTIMATE_PERCENT=>DBMS_STATS.AUTO_SAMPLE_SIZE);
It took about 1,5 seconds. Now the results:
NUM_ROWS SAMPLE_SIZE VARIANCE OBJEC
9826851 4715 1,73149 TABLE
10262432 561326 2,62432 INDEX
The estimate 10% was more exact - also a 1,7 and 2,6 percent variance is still ok. It's also very interesting, that using AUTO_SAMPLE_SIZE
causes oracle to execute a estimate 5% for the index and a estimate 0.5 for the table.
I tried again with a table containing only 1 Million records and oracle did an estimate with 100% for the index.
So for me I will continue using AUTO_SAMPLE_SIZE. Its very flexible, fast and accurate.
Dim
PS: Is there a way to format code like one can do in HTML using <code> or <pre>?

Rebuild index vs Analyze index

Hi All,
I am realy confused about rebuilding index versus Analyzing index.
Could anyone plz help me out what is the diffrence between them.
How to Perform analyze of indexes and Rebuld of Indexes for both Oracle 9i and 10g databases.
Thanks a lot

CKPT wrote:
You can see the posts of experts by jonathan
I am realy confused about rebuilding index versus Analyzing index. tell us you are getting confused why we need to ananlyze before reubild index? if so
if index analyzed the whole statistics of index will be gathered.... then you can check what is the hieght of the index.. according to the height of the index you need to take step is index need to be really rebuild or not...
lets see furhter posts from experts if not clear..Thanks OK, so you determine the height of an index is (say) 4. What then ? If you decide to rebuild the index and the index remains at a height of 4, what now ? Was it really worth doing and do you rebuild it again as the index height is still 4 and still within your index rebuild criteria ? At what point do you decide that rebuilding the index just because it has a height of 4 is a total waste of time in this case ?
OK, so you determine the index only has a height of (say) 3, does that mean you don't rebuild the index ? But what if by rebuilding the index, the index now reduces to a height of just 1 ? Perhaps not rebuilding the index even though it has just a height of 3 and doesn't currently meet your index rebuild criteria is totally the wrong thing to do and a rebuild would result in a significantly leaner and more efficient index structure ?
So what if it's pointless rebuilding an index with a height of 4 but another index with a height of 3 is a perfect candidate to be rebuilt ?
Perhaps knowing just the height of an index leaves one totally clueless after all as to whether the index might benefit from an index rebuild ...
Cheers
Richard Foote
http://richardfoote.wordpress.com/

Q/s on rebuilding index

Hi All
in one of our applications we want to rebuild index which his craete as below, this is on 11G 11.2.0.3.0 Solaris 64bit
CREATE INDEX idx_id ON scott.branch(bank_id)
INDEXTYPE IS CTXSYS.CONTEXT PARAMETERS
('FILTER CTXSYS.NULL_FILTER SECTION GROUP CTXSYS.HTML_SECTION_GROUP');
Is rebuilding the index a reasonable option or will that be much slower than a sync ?
secondly is ctx_ddl package installed by default
thanks

hi,
you should ask this question to: Text for get answers faster.
by the way, if you installed Oracle Text (which is default on installation) ctx_ddl package is also comming too.

I just updated to 4.0.1 on my mac and now it says "Firefox is currently in offline mode and can't browse the web". It is not my internet since I am using Safari just fine. Any suggestions? I sure wish I wouldn't have updated!

I just updated to 4.0.1 on my mac and now it says "Firefox is currently in offline mode and can't browse the web". It is not my internet since I am using Safari just fine. Any suggestions? I sure wish I wouldn't have updated!

Make sure that Work Offline is unchecked: File > [] Work Offline

I have a problem I can not up grade to the new AOL due to having a MAC 10.4. Now when I go on the site opens but when I finish one thing it tells me error message Offline Mode. What can i do it just shuts the internet down.

When I open Firefox , and go to AOL.com it goes to the home page with a message to up grade. I have tried that it tells me I can not do it on my operating system MAC 10.4. Now when I sign on to Aol to use my favorites some time it lets me on, but if i write something e-mail or such it sends it them tells me error message Offline mode check off in file which I do, but it shuts down the internet. I cannot get back on.

You are right, but how could i send it to Apple? when the phone company first replaced my iphone they had in stock alots of iphones and they just sent mine back to Apple and gave me a new one, so all i did is to give them my phone, but now how could i sent it to Apple? and i cant send it by myself, and the store wont do that, its a lost for them.. so sending it to Apple wasnt an option from the begining.
and for the record, i dont think the store where i bought it is an authorized shop.. its just a store who boughts phone's from Apple in a low price and sells it in much more money..

I have been using Firefox for years. I just downloaded your newest version. The new version shows to be downloaded successfully, but when I click Firefox Icon, I get a window that is called "Offline mode"

It states, "Firefox is curerntly in offline mode and cona't browse the web. It says to uncheck the "work offline" menu item.

See:
*File > [ ] Work Offline
Press F10 or press and hold the Alt key down to bring up the "Menu Bar" temporarily.

How can I prevent Firefox from starting in Offline Mode when there is no internet connection?

Hey!
When I fire up my laptop from standby it takes some time before the wireless internet connection is established. If i am too quick and open Firefox before that happens, it automatically goes into Offline Mode, which I hate a lot.
Is there any way to disable this behaviour?
I have already tried everything mentioned here: [http://superuser.com/questions/208146/can-firefoxs-offline-mode-be-disabled http://superuser.com/questions/208146/can-firefoxs-offline-mode-be-disabled]
Also I found this addon, which unfortunately does not work with Firefox 11: [https://addons.mozilla.org/de/firefox/addon/disable-automatic-offline-mana/ https://addons.mozilla.org/de/firefox/addon/disable-automatic-offline-mana/]

That shouldn't happen in Firefox 4 or later. You should just get a page not found or server not found message.
Can you check the following setting?
(1) In a new tab, type or paste '''about:config''' in the address bar and press Enter. Click the button promising to be careful.
(2) In the filter box, type or paste '''offline''' and pause while the list is filtered
(3) Look for '''network.manage-offline-status''' and reset it to False (either double-click or right-click/reset).
Does that work?

Can I stop Firefox from always opening in Work Offline mode because it's preventing my Macbook from accessing Internet on our wireless home network?

Sorry, I should have said iMac, not Macbook, if it makes a difference. The problem is Firefox 3.6.10 always starts in Work Offline mode, and Internet won't activate unless we restart, sometimes up to five times.
The iMac is on our home wireless network which we had no problems with before using Safari on the Macbook we upgraded from.
Note: I'm posting this query from another computer.

Did you check the network setting?
Sounds that you have set to connect automatically when a connection is not available.
*http://kb.mozillazine.org/Autoconnect
*http://kb.mozillazine.org/Browser_attempts_to_connect_when_already_connected

REBUILD INDEXES IN OFFLINE MODE

Similar Messages

Maybe you are looking for