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SQL 2005 Maintenance Jobs (backup, index reorg, index rebuild, shrink, etc.)

Posted on 2008-11-18
Medium Priority
Last Modified: 2012-06-21
I have some general questions about SQL Maintenance Jobs.   Currently, I have a separate backup job for each of our DB's, 3-5 jobs, which also notify a group via DBMAIL upon failure.   Now, I want to introduce Index rebuild, Index Reorg, and Shrink plans.   So here are my questions:
1).  Would it be better to have my backup jobs under one maintenance plan and w/ multiple subplans? The backup jobs are scheduled daily and run in the evening.
2).  I know the difference between Index Rebuild and Index Reorg and that with SQL 2005, you can do an index rebuild online leaving the index available.  Which one is better?  How often do you would you want to run either? I assume weekly or on demand depending on performance or size issues.
3).  For the DB Shrink, this could be set to run weekly and before the backup, so when the backup job runs, it will pick up the smaller DB?  Can it be be a subplan of the db backup job and have a constraint for the backups to start once the DB shrink subplan is completed?
4).  Is there any specific order these four maintenance plans/subplans should be run?  

Any specifics on the parameters in the index rebuild wizard or t-sql would be appreciated.  
Question by:66chawger
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LVL 15

Accepted Solution

MohammedU earned 2000 total points
ID: 22986976
It is better to have to different jobs/plans for backup and maintenance (reindex).
Online reindexing is only available in EE and it has some ristrictions like table should not have text/varchar(max) columns...
It is better to reindex the table which fragmented instead of doing all without checking the fragmetation.
DB shrink is not advisable because, if may grow again and can impact the peformance...

YOu can also you use the script to reindex instead of maintenance plance...


Author Comment

ID: 22987313
Very interesting!!!  When you speak of reindexing are you speaking in general, or about rebuild vs. reorg?  I have had luck performing index reorg test, but as you said about the online reindexing (assume you are speaking about rebuild) I have encountered errors.  This could be related to what you mentioned about tables that should not have text/varchar (max) columns....

Ok, what is the best way to look at fragmentation do decide if it is feasible to do a index reorg?  
So you would not advise doing DB shrink as part of a maintenance job, correct?  So other than backup plans, what other maintenance plans would you suggest if not index reorg/rebuild and shrink?

Author Comment

ID: 22987386
I spoke too soon!  I see you gave me a link to check fragmentation.  Is it true that index reorganization, not rebuild, locks the table?
LVL 15

Expert Comment

ID: 22987404
ReOrg will create big tlog because it is logged operation irrespective of recovery model...
rebuild locks the table unless you use ONLINE indexing option...

Author Closing Comment

ID: 31517928
Excellent feedback..thanks!

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