I have a weekly Maintenance Plan Reindex job that has failed because of a deadlock. My question seems simple enough and I'm ashamed to say I ought to know this answer, but here goes: Does the rest of a given job continue after such failures (this one was maybe 3/4 through the log) occur?
View 6 RepliesI have a query that will generate records monthly based on the number of months that i calculate between two date feilds for a given requestid. How can i use the same query to generate records for weekly and bi weekly based on the receiveddate field that i use in the subtraction for calculating the number of months.
Also when inserting i have been adding a month for every record as i was generating monthly and now i would have to add week and 2 weeks to the receiveddate
SET NOCOUNT ON
GO
declare @num_of_times int
declare @count int
declare @frequency varchar(10)
declare @num_of_times1 int
[Code] ....
I have query on grouping data on weekly basis..
1. Week should start from Monday to Sunday
2. It should not consider current week data(suppose user clicks on report on Tuesday, it should display the data for last week).
3. I want output like below
Week1,week2,week3..... week12,AverageofWeek
12 , 10 ,0.........0 12
Let's say I have a trigger on my orders table.
When this fires a query is done on the customer table to get some values
and put some order/customer data into an audit trail table.
In one period of time, it appears that the trigger did not put the data into the separate table. No known reason.
Suspicion: What if the customer table were locked by some process when the trigger fired. Maybe the trigger was chosen as a deadlock-victim.
?? I guess I need to check for @@ERROR during the trigger and do something. Any suggestions? I think I can raise the priority of my trigger to "win" during a deadlock.
If trigger activity is chosen as a deadlock-victim, can the trigger make another attempt to complete it's activity?
I've setup a deadlock monitor using extended events like this.
CREATE EVENT SESSION [deadlock] ON SERVER
ADD EVENT sqlserver.lock_deadlock(
ACTION(package0.process_id,sqlserver.client_app_name,sqlserver.client_hostname,
sqlserver.database_id,sqlserver.database_name,sqlserver.plan_handle)
[Code] ....
Deadlock happened couple of days ago. I'm trying to determine the cause of deadlocks. What script should I use to pull that information to see what objects/processes caused deadlock?
I have enabled 1222 and 1204 trace and restarted sql server. then i have replicated deadlock in my local.
This is the error came in sql
Msg 1205, Level 13, State 45, Line 1
Transaction (Process ID 51) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. Rerun the transaction.
Then i opened ERRORLOG file , there is no information about deadlocks .
Where can found deadlock information and file path. is there any extra options required to enable trace?
DBCC TRACESTATUS(1222,-1)
TraceFlagStatusGlobalSession
1222110
How to find location trace log?
I am getting deadlock in my production, i was taken deadlock information from trace file , i found deadlock graph but i am unable to find exact scenario . I am attaching deadlock trace file.
View 5 Replies View RelatedI am learning Extended event to capture deadlock which already happened, for this in my SQL SERVER 2012.. I am simulating a deadlock . With [URL]... where given a query to find the deadlock details using extended event here is the code..Retrieve from Extended Events in 2012.
SELECT XEvent.query('(event/data/value/deadlock)[1]') AS DeadlockGraph
FROM ( SELECT XEvent.query('.') AS XEvent
FROM ( SELECT CAST(target_data AS XML) AS TargetData
FROM sys.dm_xe_session_targets st
JOIN sys.dm_xe_sessions s
[code]...
This code creates a deadlock but when i run the above Extended events query to get the details of deadlock, it doesnot display any results.
In order to troubleshoot some deadlocking that I am seeing on SQL Server, I am trying to capture the Deadlock XML by enabling the Events Extraction Settings option 'Save Deadlock XML events separately' and specifying a Deadlock XML results file.
Meanwhile, I am also tracing the Deadlock graph, Lock:Deadlock, and Lock:Deadlock Chain events. Yet the xdl file remains empty even though I am getting hits on the events themselves in the SQL Profiler trace.
Also, I have the following trace flag settings enabled.
TraceFlagStatusGlobalSession
1204110
1222110
Why the xdl file remains empty even though (I think) it should contain some XML for deadlocks that are actually happening?
We have (running SQL 2012 Std) and have enabled trace flag 1204 and 1222 for capturing deadlock through extended events. I have enabled deadlock notification through email .But it only send deadlock event occurred notification from the sql server error log . I was wondering if its possible to email the deadlock details they get generated in extended events via DB mail.
View 1 Replies View RelatedI am getting a number of deadlocks when inserting and deleting items from the same table.
The delete statement has a U lock and awaiting an IX lock on an index that covers the column in the where clause.
The insert statement has a IX lock and awaiting a U lock on the same index.
The delete statement is deleting about 5000 rows, where as the insert statement is inserting a single row.
Both these statements are found in stored procedures being called from LINQ to SQL.
I am wondering if there is a way I can prevent the delete statement taking the U lock out?My thinking being if the delete didn't take out the U lock then it would not deadlock with the insert. Are there any hints I could use to avoid the particular lock above?
I have seen various examples of multiple updates causing a deadlock, which can be fixed by adding multiple indexes. However, as I am inserting and deleting rows I imagine that all the indexes will need to be updated by both operations.
I have inherited the architecture and don't have the time to redesign everything at present. My backup plan is to deprioritize the delete and build in a retry mechanism.
However, it would be really good if I could find a more elegant way to handle deleting and inserting rows at the same time.
Deadlock trace information below...
11/02/2015 22:21:26,spid21s,Unknown,waiter id=process1cc9c68558 mode=IX requestType=wait
11/02/2015 22:21:26,spid21s,Unknown,waiter-list
11/02/2015 22:21:26,spid21s,Unknown,owner id=process203f31b498 mode=U
11/02/2015 22:21:26,spid21s,Unknown,owner-list
11/02/2015 22:21:26,spid21s,Unknown,pagelock fileid=1 pageid=721673 dbid=6 subresource=FULL objectname=PerforceReports_Staging.dbo.DebugReport id=lock1663f5d900 mode=U
[Code] ....
We have around 5 SP’s which are inserting data into Table A,and these will run in parallel.From the temp tables in the SP,data will be loaded to Table A. We are getting deadlock here.No Begin and End Transaction used in the stored procedure.
What could be done to avoid deadlock.
I have a deadlock trace running on a production server that is filling up with the following:
Lock: Deadlock Chain
Parallel query worker thread was involved in a deadlock SPID 8
105 - Resource Type Exchange
Spid 8 is a SQL process LOCK MONITOR
There are no graphs as seen with typical deadlock, so it is not two queries that are deadlocking, and I've never seen a deadlock for "LOCK MONITOR"
Is there a way to send out an email woth deadlock information (victim query, winner query, process id's and resources on which the deadlock occurred) as soon as a deadlock occurs in a database or at instance level?I currently has trace flag 1222 turned on. And also created an alert that send me an email whenever a deadlock occurs. but it just says that a deadlock occurred and I log into sql server error log and review the information.
View 5 Replies View RelatedHi guys.
I an application here developed by a third party software house.
In the past, for some reason, the database would fail daily. The software
house recommended that we use dbcc reindex on all tables within the
databases twice daily. This was scheduled and is now running. Now the
database no longer fails.
The fix works and I don't understand why.
I don't understand why this would fix the problem. Why would reindex
twice daily solve the problem.
It seems excessive to have to reindex every user table twice daily.
Parg
I tried to run dbcc reindex on all user tables in a database. There are no
clustered indexes, but multiple non-clustered indexes on each table.
The output file from dbcc reindex shows that it should have worked. But when I
run DBCC SHOWCONTIG, the scan density of the indexes that were in bad shape did
not improve.
Any ideas?
Thanks,
Ben Reeder
.
Hello everybody.
1. I have 28 Gig database with 4 tables above 4 Gig each with very bad
fragmenataion, each table has between 3 and 5 indexes
2. Database set for full recovery and I use custom log Shipping to restore
db on stand by server every 15 min.
I tried to run DBCC INDEXDEFRAG on one index on 4Gig table .
following took place
1. It took 4 hrs to complite DBCC INDEXDEFRAG
2. log shipping fail.
3. log file size of 2 Gig generated after DBCC INDEXDEFRAG complited
I tried to run drop and create clustered index on table it create same
problem - log growing, log shipping fails
(if log shipping fails and stand by database get suspended it will take 6- 8
hrs to restore it from backup and apply all logs)
So my question is
What would be best way to rebuild- reindex - defragment 28 Gig database
when it set to fully recovery and log shipping
Thank you
Alex
Hi guys,
I need a help with this question. In SQL 2000, Can i run update,insert or delete queries while the Indexes of that table is being Rebuilt? Will
i get blocked by the DBCC DBreindex process?
thank you
I have a process that runs each day and it imports about 550K records into a database. My questions is it appears I have to reindex the database after each import otherwise the sp's that I have written will just run and run and run. After the reindex job things run within 60 seconds. I am just looking for some insight on why, I understand why a reindex is done, but dont know if I understand why I have to reindex every time.
View 9 Replies View RelatedHi experts, I would like to ask for this error that occurs upon executing my reindexing script
here is my script
USE mydatabase
DBCC DBREINDEX('outpatient', '', 70)
go
Then this error message will appear. I researched for this error and from the site that I've found they say that the table is corrupted? That I need to restore a better backup..?
The statement has been terminated.
Msg 824, Level 24, State 2, Line 1
SQL Server detected a logical consistency-based I/O error: torn page (expected signature: 0x55555555; actual signature: 0x55555545). It occurred during a read of page (1:353409) in database ID 10 at offset 0x000000ac902000 in file 'C:Program FilesMicrosoft SQL ServerMSSQL.1MSSQLDataBizbox_HS7.mdf'. Additional messages in the SQL Server error log or system event log may provide more detail. This is a severe error condition that threatens database integrity and must be corrected immediately. Complete a full database consistency check (DBCC CHECKDB). This error can be caused by many factors; for more information, see SQL Server Books Online.
Darren Bernabe Blanco
how often should be done and if it don't do it what will happen?
=============================
http://www.sqlserverstudy.com
I#ve been doing disaster recovery on a web box that died today.
So I thought I'd do some "downtime" maintenance on the DB server
I ran a BDREINDEX on all tables, all indexes. (I know this is the 2000 way, but I assume its as good as the proper 2005 way??).
5 minutes on a 10GB database. Not bad!
I checked the DEFRAG and UPDATE STATS processes that run overnight.
They are basically defragging only tables with SHOWCONTIG indicating fragmentation. And then doing an UPDATE STATISTICS WITH FULLSCAN on all tables
That is taking an average of 30 minutes ...
Is DBREINDEX the equivalent of an UPDATE STATISTICS WITH FULLSCAN, or is it in some way a smaller-sample version?
I'm wondering why I don't just lock the DB and do a REINDEX of everything in 5 minutes ...
Kristen
Hi,i have several tables in production whose contents are renewd totally in 1week. So everyd day we delete ~15% records and then insert 15% new.And after a few days, the performances drops :TABLE level scan performed.- Pages Scanned................................: 169617- Extents Scanned..............................: 21630- Extent Switches..............................: 153827- Avg. Pages per Extent........................: 7.8- Scan Density [Best Count:Actual Count].......: 13.78% [21203:153828]- Logical Scan Fragmentation ..................: 45.06%- Extent Scan Fragmentation ...................: 52.66%- Avg. Bytes Free per Page.....................: 5042.5- Avg. Page Density (full).....................: 37.70%I can't program a dbcc reindex every day because of concurrent access (itlocks the tables too long), actually i can only program it on sunday.What else can i do ? I can adjust the fill factor but how to find the goodvalue if i don't want to waste space.The total size of the database is ~150GB.Thx
View 1 Replies View RelatedI am currently running the Back Office Resource Kit Log shipping option for a database running on an SQL 7 installation. As part of the on-going maintenance work that we are being asked to perform by the application vendor I need to run a DBCC REINDEX run on most of the tables in the database. Currently this is done by stopping the log shipping routine and then running the reindex script, then taking a full backup and restoring the backup to the secondary server then restarting the log shipping scripts. This is a very time consuming task that has to be performed at unsociable hours.
Has anybody got an opinion as to if this would work at the same time as the log shipping scripts or do I have to continue as at present.
Responses gratefully received.
Regards
Phil Corby
Geest IT Services
I am maintaining a large table with millions of rows that has two non clustered indexes and data changing frequently, I need to keep the indexes fresh. Update Statistics runs much quicker than Reindex. What is the appropriate situation for each and why?
Thanks in advance.
All,
I first ran indexdefrag on a table with 1.5 billion rows.
logical fragmentation was at 95%.
logical frag went down to 3% with no real effect on disk.
DBCC reindex had previously been bombing undetected.
Now I've run a reindex on this table:
Reindex Job with Fillfactor =100
Ran in 3:05
Free Disk went from ~150GB before operation to 49GB
File4 went from 347GB to 504GB
Why has so much free disk been consumed by this operation and not released ??????????
Is my only choice to shrink data file???
thanks
Env.
Win2k ENT os
SQL 2k5 std 64bit
I have a production 60GB database set to Full Recovery and every 15 minutes I am log shipping to a Stand by Server .
During the production hours there are no problems but at night when I run DBCC DBREINDEX, the log grows to 22GB and because of this I have a problem sending this over the network to the stand by server.
I tried changing the recovery model to Bulk_Logged but the there is no difference in log file backup size.
AnyIdea
Dear All,
is it ok to run index rebuild script on publisher and after that in subscriber? what are the steps i need to take to do this?
will it affect the replication? please help me here.
Arnav
Even you learn 1%, Learn it with 100% confidence.
Hi Folks,SQL Server 2000 SP3 on Windows 2000. I have a database on which I ranthe command :dbcc dbreindex ('tablename')gofor all tables in the database. Then I compared the dbcc showcontigwith all_index output from before and after the reindex and on thelargest table in the database I found this. First output is prior toreindex:Table: 'PlannedTransferArchive' (1975014117); index ID: 1, database ID:7TABLE level scan performed.- Pages Scanned................................: 184867- Extents Scanned..............................: 23203- Extent Switches..............................: 23324- Avg. Pages per Extent........................: 8.0- Scan Density [Best Count:Actual Count].......: 99.07% [23109:23325]- Logical Scan Fragmentation ..................: 11.13%- Extent Scan Fragmentation ...................: 35.46%- Avg. Bytes Free per Page.....................: 60.0- Avg. Page Density (full).....................: 99.26%Second output is from after the reindex:DBCC SHOWCONTIG scanning 'PlannedTransferArchive' table...Table: 'PlannedTransferArchive' (1975014117); index ID: 1, database ID:8TABLE level scan performed.- Pages Scanned................................: 303177- Extents Scanned..............................: 37964- Extent Switches..............................: 42579- Avg. Pages per Extent........................: 8.0- Scan Density [Best Count:Actual Count].......: 89.00% [37898:42580]- Logical Scan Fragmentation ..................: 43.19%- Extent Scan Fragmentation ...................: 24.78%- Avg. Bytes Free per Page.....................: 75.1- Avg. Page Density (full).....................: 99.07%Following are my concerns:The following numbers are all higher after reindex than before reindex:pages scanned, extent switches, logical scan fragmentation, avg bytesfree per page, avg page density.scan density is lower after reindex than before reindexSeems to me that the numbers that are higher after reindex should belower and numbers that are lower after reindex should be higher? Ididn't specify the fill factor in the dbcc reindex command so it shouldhave used the default fill factor. The fill factor has never beenchanged on this machine.Am I missing something?Thanks,Raziq.*** Sent via Developersdex http://www.developersdex.com ***
View 3 Replies View RelatedDoes running DBCCReindex update the space allocated columns in sysindexes? I understand that running dbcc updateusage updates the space allocated columns in the sysindexes table. But, I cannot find any documentation that indicates whether dynamically rebuilding the indexes as opposed to drop and recreating the indexes updates the space allocated columns in the sysindexes table?
Any information would be helpful.
Thanks.
Gail Wade
Database Administration
Raymond James Financial
gwade@it.rjf.com
I have a standard reorganise/reindex job running against a 32GB database on SQl Srever 2000. When trying to run the job it fails and returns Error 1105 <'PRIMARY' filegroup is full>. What's confusing me is that I have 53GB free on the drive on which my Primary file group sits.
Has anyone else come accross this problem when trying to set up a regular reindex job?
(more detail) the maintenance plan only includes the reorganisation/reindex job, no other jobs - including backing up the DB - are included. The DB in question is the only DB on the server: it's a test server.
I'm trying to understand what is happening to one large table.
In a DB SQL 2008R2, I'm trying to track a rapidly increasing DB size. It's due to one table recently added.
Despite the table's no rows increasing its size reduces after a scheduled re-index.
I've recorded the space used by this table by recording EXEC sp_spaceused 'tableName'
---
NoRows reserved data index_size unused
128864512300384 KB 2290928 KB9432 KB24 KB AFTER reindex
128864515406232 KB 5366184 KB39280 KB768 KBBEFORE reindex
N.B. The only thing I'm aware of happening in the time period is a reindex as part of scheduled task. I could be missing something else happening.
The table has only one Index the PK which is clustered, No Fill factor is specified. The Server Default fill factor =0.
I read fillfactor=0=100 Will always try and fill the pages so space used will be minimised?
After running the reindex the index fragmentation is v.low. I've not recorded the fragmentation before reindex.
I can see the Data is not added in Clustered index order.
Does anyone know what the commands would be? I am trying to create a job that puts a DB in simple mode then launches a reorg and re-index, then sets it back to full when it is complete. This way I can eliminate large transaction logs being created.
Any help would be great!
Thanks