Exectution Plan
Jun 22, 2001When looking at the Est. Execution Plan of a query in QA, what should I be looking for? What numbers are acceptible? Does anybody have a link to any information on this subject?
TIA,
Chris
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SQL Server 2008 :: Is Only One Plan Is Kept For One Query In Plan Cache
Mar 14, 2015Is only one plan is kept for one query in plan cache?
i heard generally hash is created for a query and plan is search with this hash.
Cached SQL Plan Vs. Stored Proc Plan
Dec 12, 2002We have a debate in our team about embedded SQL vs. Stored Procs.
The argument is why use SP's if you can embed the SQL in the code and SQL2K will cache it on the fly?
I can't find any definitive information on pros and cons between the two methods.
If there are no major performance issues, or gotchas, I guess it comes down to developer preference.
SP Pros:
- Great SQL support in VS.NET (dev, debug, integration)
- Seperation of database specific code from middle tier.
- Less lines of code in middle tier
- VS.NET support for .xsd dataset definitions.
- Logic closer to data for more demanding processes.
Embedded SQL Pros:
- Less artifacts for version control
- Better encapsulation of logic
Any info would be appreciated.
thanks
Kevin
Prepared SQL Plan Vs. Procedure Plan
Nov 23, 2005I am working on tuning the procedure cache hit ratio for my server. We haveadded 4 Gb of memory to the server, which has helped. In addition, I have runthe DBCC FREEPROCACHE, which helped for a couple of days to get the hit ratioup to about 84% (from 68%).When I use the performance monitor on the server and look at SQL Server CacheManager:Buffer Hit Ratio, I see that the Prepared SQL Plan is around 97%, butthe Procedure Plan hit ratio is down around 55%. I've done some research ondifferent tuning techniques, but can't seem to find 1. a clear definition ofthe difference between the prepared sql plan and the procedure plan and 2.other than adding memory and running dbcc freeprocache, how can I get theprocedure plan cache raised? I do know that there are some procedures thatneed to be modified to be called fully qualified (e.g. exec dbo.sp_###instead of exec sp_###), but I don't think that those will increase theprocedure plan by 30% or more.Any insight you can give would be greatly appreciated.Thanks,Michael--Message posted via SQLMonster.comhttp://www.sqlmonster.com/Uwe/Forum...eneral/200511/1
View 1 Replies View RelatedActual Execution Plan Vs Estimated Execution Plan
Jul 7, 2006The benefit of the actual execution plan is that you can see the actual number of rows passing through each step - compared to the estimated number of rows.But what about the "cost percentages" ?I believe I've read somewhere that these percentages is still just an estimate and is not based on the real execution.Does anyone know this and preferable have a link to something that documents it?Thanks
View 1 Replies View RelatedSQL Maintenance Plan
Mar 5, 2001I have deleted a database from SQL Enterprise Manager. Anyone know a way to clear that database from my maintenance plan? I do not wish to just uncheck the deleted database or create a new database plan.
Thanks!
Maitenance Plan
May 1, 2001Hi All,
I have around 10 maintenance Plans on my server and all the plans are running fine except for one which takes for ever....Yesterday I scheduled it to run at 1 AM and it was still running when I came in this morning...Usually this job used to take only 2 minutes and now it takes forever....
I tried to delete the maintenance Plan and created a new one , but no luck..
But If I try to back up the database by right clicking the database --
All Tasks --- Backup database , it takes less then 2 minutes..But If I try to run the job created by the Maintenance Plan to back up the database it takes forever and all I can see the status of the Job as ' Executing Job Step 1"..
I created a test database and restored the database in Issue onto the test database and created a maintenance Plan for the test database and it runs fine and takes less than 2 minutes.. and I don't see any security issues on this...
B'cause the job neither fails nor executes ..So there are no error messages to look in to ...
Please let me know if any one has encountered the same problem and how to resolve it..
Thanks in Advance
Venu
Maint. Plan
May 31, 2001In maint. plan when reorg is selected for a user db, it will also work on
sys tables in user database. Is it a good thing to do ? How do I avoid sys tables in a user database not to be part of maint optimization plan ? Some script would be helpful !
Thanks,
Ivan
Db Maintenance Plan
Oct 23, 2001Hello All
I have been given a SQL Server 2000 database to look after which has been set up with a Database maintenance plan. The plan is set to backup the complete database and the transaction log. The backups are written to the local disk correctly but the plan is also set to remove any backup files (both database .BAK and transaction log .TRN) that are over one week old. Complete database .BAK files are written daily and the .TRN are written every hour daily. The .BAK files are removed ok automatically but the .TRN files are not - they are just slowly filling the disk. There does not seen to be anything different between the way the main database and the transaction log is set up in the maintenance plan.
I would be very grateful for any ideas
Plan For Installing SP3
Dec 27, 2000Hi,
Can anyone help me in comming up with a plan to install SP3
Thanks
Reddy
Maintenance Plan
Aug 31, 2000I have a strange thing in one of our Maintenance plans.
On the first tab where you check which databases you're including in the plan I have (say my database name is CAT) a 'CAT' and 'cat' database listed and the one chosen is 'cat'. However my database in all other views shows up in all caps. (even when I do an sp_helpdb)
The backups look like they're working, etc. but it just seems weird. If I go to create a new plan it only gives me the one option 'CAT' which is really what's there. I'm new and I'm thinking the database at one time was 'cat' and this is when the maintenance plan was created. Then it was renamed to 'CAT' and there's the two db's showing in the old mainenance plan.
What would you do? Create a new plan with "CAT" and just get rid of the old one with the weird 'cat' and 'CAT'?
Any other suggestions or ideas on what happened..
ann
Maintenance Plan
Oct 4, 1999I've created a database maintenance plan to backup a database, but it just
isn't happening, am i missing something. The maintenance plan appears to be
created successfully.
responses appreciated.
thanks
Todd Minifie
DBA Admin Plan
Jan 11, 2000Hi there,
Could anyone please help me, I have been given the responsibility of planning and implementing the admnistration of 25 existing SQL Servers (6.5 and 7.0) countrywide and I am unsure as to where I should start. I am relatively new to SQL Server and if someone could just point me in the right direction or possibly recommend any good publications which I could refer to, I would be extremely grateful.
Capacity Plan
Mar 9, 2000Hi!
I got two questions and please forward all your suggestions:
1: Is there any document for capacity planning of SQL Server 6.5 database?
2: Is there a way to find out total number of transactions per day in SQL Server?
Thanks in advance!
Bad Execution Plan
Aug 21, 2001I'm new to SQL server but familiar enough with databases to know this doesn't seem right.
Here's the situation:
I have a table with real estate property information. There are about 650,000 rows in it. I have a nonclustered non-unique index on the city where the property is located. There are about 40 unique values in this index.
I do a simple query like:
SELECT city,address from propinfo where city= 'CARLSBAD'. The query will return about 4,000 rows. The problem is that the execution plan that it chooses is to do a full table scan. I.E. Even though there is an index on City, it chooses to look through 650,000 rows rather than do an index seek. Something sounds inefficient here. BTW, this happens in both SQL 7 and SQL 2000. Can anyone explain why this happens? I've got to think that SQL Server is more efficient here.
Query Plan
Jul 23, 2002I am noticing a discrepency in query plans when a process is run in Analyzer as either a proc or as straight sql.
I have a query that uses a view of 5 tables that have a check constraint on the year. When I run my query in query analyzer and state year = 1999 along with over parameters then the query plan only looks at the one table.
When I take that query and make a stored proc and run the process passing the year = 1999 along with other parameters the plan states that it is looking at all of the tables in the partitioned view.
Thanks,
Here is a copy of the proc
create procedure testproc
@CUST_I varchar(6),
@FISCAL_DD_D tinyint,
@FISCAL_MM_D tinyint,
@FISCAL_YY_D smallint,
@cont_cvarchar(1),
@invoice varchar(9)
as
Select
CONT_C,
INVC_I,
DIV_C,
REG_C,
LOC_I,
INVC_D,
CUST_I,
CR_PREF_C,
FISCAL_DD_D,
FISCAL_MM_D,
FISCAL_YY_D,
PAY_CODE,
REF_TEXT,
EC_TYPE,
ADJUST_A,
ALLOWANCE_A,
MAT_A,
TAX_A,
FRT_A,
REEL_A,
OTHER_A,
GST_A,
PRIOR_BAL
from MY_FIVE_YEAR_VIEW
whereFISCAL_YY_D = @FISCAL_YY_D
AND cont_c = @cont_c
AND FISCAL_DD_D = @FISCAL_DD_D
AND FISCAL_MM_D = @FISCAL_MM_D
AND (REF_TEXT LIKE '%' + @CUST_I + '%' or REF_TEXT LIKE '%' + @invoice + '%' )
order by cust_i, pay_code
Maintenance Plan
Oct 1, 2004Can you generate script for a maintenance plan?
I know how to script a job, I was wondering about a plan.
If not, whats the best way to record the configuration?
Thanks
Lystra
Maint. Plan Help
Aug 8, 2006I need to set up a Maintenance Plan on a 6.5 DB. I know the version is old but the customer cannot upgrade at this time. When I try and run the wizard to set it up I get a warning about running a plan on a DB that is larger that 400MB. Whats the deal? Thanks for the help!!
View 1 Replies View RelatedBackup Plan
Aug 13, 2006I am having a hard time setting up a backup plan for my sql server databases. Right now I create a copy of each database on another machine on the network once a day. Once a week I upload a MSAccess version to a remote site. Obviously there are huge amounts of potential data loss if a crash of some sort would occur locally.
My new plan is looking like this:
1) Run a complete database backup once a day
2) Run Transaction Log backups every hour
My questions are as follows:
1) What role does a "Backup Device" play in this process (I currently do everything through the Enterprise Manager interface)?
2) I am having a hard time scheduling mydatabase_complete.bak and mydatabase_trans.TRN at all. I get several errors.
3) I would like to run these backups on another network machine but am not seeing how to access "My Network Places" from the "Backup Database" utility in Enterprise Manager.
Any help in the form of answers or pointing me towards a useful resource for this process would be much appreciated!
Thanks in advance~
Help With Backup Plan
Feb 7, 2004Hi all,
I am new to SQL and was given a SQL server to administer. There are lots of databases on the server and no one seems to know which one is used and which one is not. I try to do some cleanning.
1. Can I find out if there is any activity on a database so I can delete them off and how?
2. There are backup jobs that run every night which do a full backup. I am thinking of changing it to do full backup once a week and differential every night. These databases are updated daily. Some have lots of activities, some have less. Does that sound reasonable? and if I do differential backup, should I create separate back up file or should I add on to the full backup file?
Any comments or suggestions are greatly appreciated.
SQL Maint. Plan Help
Apr 14, 2004I have setup maintenance plan to run nightly.
(1) Maint plan is setup to backup the databases that users actually use to update company information (2) diffrent databases.
(2) maint plan backs up the master database this is setup to run by itself.
(3) maint plan is setup to backup the model - msdb databases together.
I setup the email notification option to inform me if my backups were successfull. below is an example that I'm recieving everymorning on every database. Something about the single user mode is causing the problem. can somone explain this to? Maybe give me a direction to follow to correct this problem. Below is an example error message that I'm recieving.
I can backup any database by right clicking selecting all tasks then backup database and I get a complete backup to problem. Why is my Maint. Plan not going through. the rebuilding of indexs is successful.
Microsoft (R) SQLMaint Utility (Unicode), Version Logged on to SQL Server 'My Server name' as 'My_Domain_NameMy_SQL_Admin_Account (trusted)
Starting maintenance plan 'LEO-SLCBOM Full Nightly' on 4/13/2004 11:15:00 PM
[Microsoft SQL-DMO (ODBC SQLState: 42000)] Error 5070: [Microsoft][ODBC SQL Server Driver][SQL Server]Database state cannot be changed while other users are using the database 'Leo'
[Microsoft][ODBC SQL Server Driver][SQL Server]ALTER DATABASE statement failed.
[Microsoft][ODBC SQL Server Driver][SQL Server]sp_dboption command failed.
[1] Database Leo: Check Data and Index Linkage...
[Microsoft SQL-DMO (ODBC SQLState: 42000)] Error 7919: [Microsoft][ODBC SQL Server Driver][SQL Server]Repair statement not processed. Database needs to be in single user mode.
The following errors were found:
[Microsoft][ODBC SQL Server Driver][SQL Server]Repair statement not processed. Database needs to be in single user mode.
** Execution Time: 0 hrs, 0 mins, 1 secs **
[2] Database SlcBom: Check Data and Index Linkage...
** Execution Time: 0 hrs, 0 mins, 1 secs **
Deleting old text reports... 0 file(s) deleted.
End of maintenance plan 'LEO-SLCBOM Full Nightly' on 4/13/2004 11:15:01 PM
SQLMAINT.EXE Process Exit Code: 1 (Failed)
Emailing report to operator 'Admin, SQL'
Thnaks for any help
SQL Rookie
Maintenance Plan
Apr 7, 2008hi everyone..
this is a little bit weird ..
i am trying to make a backup strategy. i am using sql2005.
when i go to maintenance plan. right click >> new maintenance plan...
nothing happens..
if i go with the maintenance plan wizard everything goes normally.
after doing the backup, if i right click on it and press
modify , nothing happens too.
what i mean by nothing happens is that it doesn't open the "design view".
the back up is doing normally.. but i need to set a range of 5 days before overwriting the oldest backup.
any idea what is going on or what am i missing?!
thank you
Maintenance Plan??
Apr 9, 2008Windows Server 2003R2 w/ Sp2
SQL 2005 w/ Sp2
Created weekly (full backup) and a daily (differential backup) Maintenance Plans using the wizard. I formatted the server, installed the OS and SQL. Restored the full backup (No Recovery Mode), then restored the differential backup (Recovery Mode), tested and all worked well.
Then I noticed the original Maintenace Plans I created (Full and Differential) were gone; makes sense as I had formatted the server.
Is there a way to create a Maintenance Plan file or script that I can save and just add back to the server??
Hope that makes sense.
Any help appreciated.
Kerry
Execution Plan
Feb 2, 2006Hello, I have been looking at the execution plan for a procedure call and the select, compute scalar, stream aggregates, constant scan, nested loops, asserts are all at 0% cost, the PK costs are 2% apart from a rogue 7% and a few 20%, tables scans are all at 23%. The query cost realtive to the batch is 100%. What does this all mean?
I have put non-clustered indexes on all the table attributes that are involved in the select statements but this has made no difference, i am guessing this is because my tables are not heavily populated and i may have seen a difference if i had thousands of entries in the tables the select statements acted on, is this assumption correct?
Does anyone else bother using the execution plan to tweak there DB or is it a negligible tool?
Jill
Maintenance Plan OK?
Feb 26, 2006Hello 2 all,
Could someone advise and/or correct me with my thoughts on how I would do my db maintenance plans?
(db's on SQL2000 as 'full' model)
Backups:
1) Daily Transaction log backups scheduled frequently enough.
2) Full Backup scheduled daily. Good way to start I presume ;)
Maintenance: Would be scheduled daily if possible, on non-production hours and if not colliding with daily full BU schedule.
3) Full DB reorg data&indexes.
4) Update Query Optimizer Stats (although 'Auto Update Stats' is on)
5) Shrink the logfile (ldf) as I presume this will have grown due to previous maintenance jobs.
6) If 5 ok, alter ldf filesize back to new allocated size.
Rgds,
T.
Maintenance Plan
Mar 9, 2006Hi
As per my backup policy I need to do a full backup dialy & transactional backup every 30 minutes , can i use the Maintenance plan to do this
or should I write T-sql statements & create jobs.....
I mean whats the difference between the two methods.
Thanks
In Need Of Maintenance Plan
Jul 22, 2006Hi folks.
Our products are VB6-based interacting with MSDE2000 i.e. none of our clients have EM. We have auto-backups performed twice a day by default and we encourage people to keep it to a least 2 per day.
Yesterday, one of our clients reported a problem. Upon investigation, I did a DBCC CheckDB WITH ALL_ERRORMSGS which returned the following:
Object ID 1461580245, forward row page (1:159), slot 50 points to page (1:234), slot 43. Did not encounter forward row. Possible allocation error.
So after reading a lot of posts and blogs from Paul Randal, I proceeded cautiously to copy the DB then perform a DBCC CheckDB REPAIR_REBUILD which had no effect, then a DBCC CheckDB REPAIR_ALLOW_DATA_LOSS which also had no effect. Then, I determined which table was at fault via DBCC CheckTable and I exported its data to a blank table where I discovered the missing data row and corrected for it manually. End of story.
Not a funny situation. The worst part is that this defect may have been there for a very long time, meaning that restoring the latest backup would not have helped the situation. I now realize that relying on backups alone is a huge no-no.
So, having been scarred into reality, I would like to install an automated maintenance plan. I'm used to doing it on my personal station using EM but, as stated above, I can't do that for the clientele. I was thinking about simply shrinking the databases and then doing a DBCC CheckDB WITH ALL_ERRORMSGS on all of them before performing a backup. Would this be a complete enough procedure or should I be doing something else? My understanding is that this will verify index structure and data integrity, and not attempt to repair anything which is uncovered.
Any thoughts of wisdom would be greatly appreciated.
Thanks!
Maintanance Plan
Nov 28, 2006i have a few maintanance plans on one database that i wanna copy acrross the whole plans to another database of same set up... is there a way to do this?
instead of re typing all plans?
Execution Plan
Aug 29, 2007In sql server 2005 management studio where do I find the option to run the sql query in the query analyser and also show the execution plan?
At present I see the option under Query menu which is "Display estimated Execution plan" which only shows the plan but does not execute the query.
Thanks
Maintenance Plan
Nov 8, 2007Hi,
I have created maintenance plan. It was working fine. When I tried to edit it gives me error. How to sollve this error?
Please help me.
Cannot show the editor for this task.
ADDITIONAL INFORMATION:
Value of '11/8/2007 12:00:00 AM' is not valid for 'Value'. 'Value' should be between 'MinDate' and 'MaxDate'.
Parameter name: Value (System.Windows.Forms)
Backup Plan
Jan 6, 2008I would like to implement the following backup strategy in SQL Server 2000:
full backup is done once a week
diff backup daily
tran backup every hour
How should I approach this. Should I use a backup device linked to a hard disk file? Should I create a backup device for each type of backup (full, diff, tran) and schedule it. If I use a backup device how do I distinguish each backup for old backups.
thanks
Maintenance Plan
Feb 1, 2008Hi All,
As a part of creating a maintenance plan i want to copy the backfiles from the server to another machine.How can i achieve this .Please help its very urgent.
Thanks in Advance
RKNAIR
Maintenance Plan Help
Feb 7, 2008Hello everyone!
I was wondering if there were any best practices for creating maintenance plans?
Im just getting started into the DBA world and have been delegated the task of creating maintenance plans for our 8 SQL servers.
Right now, our backup policy is Fulls on Saturday, differentials Monday-Friday.
Also, since im new, if you defragment the database and rebuild the index, does that have the possibility of "breaking" anything?
Just looking for some good articles, or anything to get me started on best practices.
Much appreciated.
TCG