Insert Row Level Locking
Sep 17, 1998SQL Server 6.5 on-line help states that IRL is only effective if the table has a unique clustered index defined on the table. IF this true and if so does anyone know why.
thanks,
Stu.
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What Is Low Level And High Level Locking
May 3, 2007Hi, Can anybody please explain me, what is low level and high level locking in SQL Server 2005 database.
Also what is the name of process which converts low level locking into high level locking and vise versa.
-Sanjeev
Row Level Locking
Feb 24, 2006I have a busy transactional table , I wanna use row level locking mechanism in msSQL.
SELECT * FROM PARTY WITH (UPDLOCK ROWLOCK)
where LastName ='Clinton'
is there any downsides of this approach?
Raw-level Locking
Sep 19, 2002I used sp_indexoption to allow row locks and disallow page locks on all indexes of a heavily contented table (lots of concurrent selects/inserts/updates). The first error I saw was "The SQL Server cannot obtain a LOCK resource at this time. Rerun your statement when there are fewer active users or ask the system administrator to check the SQL Server lock and memory configuration.". I restarted the sql server and everything is ok (the server is not very powerful and will be beefed up).
My question is that with the above settings, will the select statements acquire row-level shared locks as well? Since our select queries are fairly complicated, my main concern is that we may frequently run of of resource even with a more powerful machine. Is my concern valid or I got everything wrong?
Thanks a lot.
Row Level Locking
Apr 28, 1999Hi there,
yes, There is a 'insert row level locking' but
Is there anything for delete or update row level locking?
We keep geting deadlock problem with our application with multi-users. First we ran into the deadlock on INSERT. By setting 'insert row level locking' help us to go a little bit further but later we run into deadlock with DELETE. For my knowlege, DELETE and UPDATE requires exclusive page lock. Might be I am out of date.
Thanks in advance for your help
Tung Nguyen
Row-Level Locking
Jul 20, 2005How do I do row-level locking on SQL Server?Thanks,Nid
View 16 Replies View RelatedHow Do I Do Row Level Locking In The Sql Server?
Apr 6, 2001View 2 Replies View Related
How To Do The Record/row Level Locking In SQL 6.5/7.0?
Jan 3, 2000I am writing a VB program, which needs to update record A in one table using transaction control (BeginTrans & CommitTrans). But due to the page-level locking, before the "CommitTrans", other users couldn't not read other records in the same table.
Is there any way that I can do the record/row level locking? If possible, could you provide me some VB source code? Such as how to use "DBCC ROWLOCK" or how to set for row-level locking.
Thanks for your kind help.
SQL 2000 - Row Level Locking
Jul 20, 2005Hi,We have encountered deadlock on a table which is used to generatesequential numbers for different categories eg typical entriesCategory ValueTRADE_NO 1456JOB_NO 267.....The applications reference the relevant category applicable to themand updatethe Value accordingly. This is table is very small, occupying 1 page.However, it has no index as it was not seen to be appropriate for atable this size.However, can someone please advise whether1. An index is required for row level locking2. If an index on a table as small as above is likely to reduce thedeadlock rate.Also, please consider the following but which I am not sure isrelevant for above query.We noted that when we migrated the database concerned from SQL 6.5 toSQL 2000, using DTS, that the database was NOT strictly in SQL 2000format for non clustered indexes (NC) ie the clustered key was notpart of the NC index until the clustered index was rebuilt.Given this should I just rebuild this table with a fake index and dropit thereafter.We are aware of the different techniques used to avoid deadlocks (egtables accessed in same order etc) and have , as much as possible,implemented those practices.I thank you in advance for any help you may be able to offer.ThanksPuvendran
View 12 Replies View RelatedTransact SQL :: Row Level Locking In Server
Apr 22, 2015We have one table.We have updated the status for one column to 1 and we did not committed the transaction. Can we do an another update on another row.
In below example i am updating GEO_D and transaction is not committed. Now my requirement is we have to update other records (not Geo_D). If try to update GEo_D it should wait.
IF OBJECT_ID('TEMPDB..##TEMP_STSTUS') IS NOT NULL
DROP TABLE ##TEMP_STSTUS
CREATE TABLE ##TEMP_STSTUS
(
ID INT IDENTITY(1,1)
,NAME VARCHAR(10)
,STSTUS VARCHAR(10)
)
INSERT INTO ##TEMP_STSTUS SELECT 'GEO_D','0'
[Code] ....
Row Level Locking And SQL Server 6.5 Compatibility Mode
Jan 5, 2001I'm running SQL Server 7.0. I have a DB running with 6.5 compatibility mode.
Do INSERT, UPDATE or DELETE queries use row level locking in this DB ?
(I know if I set the db compatibility mode to 7.0 row level locking will be enabled)
Thanks in advance for your help.
Dont Know About Database Level Locking Scheme
Apr 20, 2007I m using sql server 2005
i have got one request ,to apply page level locking on database
can nyone how it is done
i can do that for a single script and for session(transaction isolation level)
but dont know about database level locking scheme
thanks in advance
Force Row Level Locking In SQLServer 2000 ?
Jul 20, 2005HiIs it possible to force row level locking in one or more tables insome database. We have some problems when SQL Server decides to choosepage- or table-level locking.We are using SQL Server 2000.Best regardsAarno
View 1 Replies View RelatedRow Level Locking For Queue Table To Get Rid Of Concurrency Problem
Apr 7, 2004Hi all
We are writing a web-based multi-user call centre application application.
we are getting concurrency problems as you would expect with a multiuser application.
the application is made for callers who will bring up a different contact to call based on some predefined priority. now because the algorithm that prioritises the contacts takes a good 2 seconds to run, if 2 different caller request for the next prioritised contact, they will retrieve the same contact.
The only way that we think can resolve this problem is by building a queue. The queue would be implemented as a table, the particular implementation of this queue would be, when ever someone retrieves an entry from the queue, a background process will go on and generate a new queued item, i.e. in a FIFO manner. So that's how we think we should implement the queue.
Now come the question how to implement it. My idea is to have row level locking and a trigger to remove queue items from the queue. so that once one caller have looked at one of the item in the queue, another user can't look at the same item.
Any suggestions as to how i might be able to avoid concurrency problems?
What do you all think of my idea of implementing the FIFO queue?/
Is it possible to do row level locking in such a way that other users won't even be able to read the locked entry??
James :)
SQL Tools :: Maintenance Plan - Page Level Locking
May 9, 2008I am running one maintenance plan which includes just "Chech DB Integrity" and "Reorganised Index". But it failed and I am getting following error:-
Failed-1073548784) Executing the query "ALTER INDEX [CgiExclusion_ProfileId] ON [dbo].[CgiExclusion] REORGANIZE WITH ( LOB_COMPACTION = ON )" failed with the following error: "The index "CgiExclusion_ProfileId" (partition 1) on table "CgiExclusion" cannot be reorganized because page level locking is disabled.". Possible failure reasons: Problems with the query, "ResultSet" property not set correctly, parameters not set correctly, or connection not established correctly.
Locking In Read Committed With Row Versioning Isolation Level
Dec 27, 2007I have a question on locking pattern of read committed with snapshot isolation level that when two transaction update two different records then why do they block to each other even if they have previous committed value (old version of record).
I executed the below batch from a query window in SSMS
--Session 1:
use adventureworks
create table marbles (id int primary key, color char(5))
insert marbles values(1, 'Black')
insert marbles values(2, 'White')
alter database adventureworks set read_committed_snapshot on
set transaction isolation level read committed
begin tran
update marbles set color = 'Black' where color = 'White'
--commit tran
Before committing the first transaction I executed below query from second query window in SSMS
--Session 2:
use adventureworks
set transaction isolation level read committed
begin tran
update marbles set color = 'White' where color = 'Black'
commit tran
Here the first session blocks to second session. These same transactions execute simultaneuosly in snapshot isolation level. So my question is why this blocking is required in read committed with snapshot isolation level?
Thanks & Regards,
Subhash Chandra
DB Engine :: Possible To Force Row Level Locking In Server 2015 Before Inserting Data
Nov 11, 2015Is it possible to force row level locking in Sql server 2015 before inserting the data and release the same afterwords..find the code for which we would like to impliment the same
DECLARE @TravelAgentid Varchar(20)
DECLARE @Date DATETIME2(7)
DECLARE @InsDate DATETIME2(7)
set @TravelAgentid ='A101'
[code]....
Insert Statement Locking
Jun 11, 1999Does anyone know how to stop SQL server from applying exclusive table locks on mass Insert statements. I need to allow concurrent inserts into the same table using INSERT ... SELECT * FROM ...
SQL Server applies exclusive table locks that prevent this. I've tried setting LE as high as it goes but with no success. Microsoft suggest using single row inserts but this will be far too slow!
Any help would be much appreciated.
Jim Plant
Insert Statement Locking
Jun 11, 1999Does anyone know how to stop SQL server from applying exclusive table locks on mass Insert statements. I need to allow concurrent inserts into the same table using INSERT ... SELECT * FROM ...
SQL Server applies exclusive table locks that prevent this. I've tried setting LE as high as it goes but with no success. Microsoft suggest using single row inserts but this will be far too slow!
Any help would be much appreciated.
Jim Plant
Locking Occurs When Trying To Insert - HELP
Nov 11, 2001I am trying to insert data using the select * command from one table into another, but query analyzer just seems to run and run (over one hour before I stopped it). The current activity shows a huge number of extent locks. The table itself has approx 90,000 rows. What is causing this insert not to finish, and how do I sort it?
I am a little confused over LE thresholds etc. At present the server has the following settings:
LE threshold max - 10000
LE threshold min - 20
LE threshold % - 0
locks - 60000
Will changing these values help??
Derek
Locking Table While Insert
Apr 4, 2007Hi,
I want to insert a record in a table having an identity column as primary key. I want to lock the table while inserting. so that no one should be able to insert, select, update, delete from the table. and once my insert is over, then will release the lock.
Can I have the code for the same. M using SQL SERVER 2005.
Thanks,
Rahul Jha
T-SQL (SS2K8) :: Reduce Locking For Insert Statement?
Sep 10, 2014There are 2 tables which need to have data inserted into them for auditing purposes. The number of inserts per minute seems be at least 50-100. How to reduce locks during inserts.
There are 2 tables
Table1
ID - Surrogate Key/identity Column
SomeColumn1
SomeColumn2
SomeColumn3
SomeColumn4_timestamp
clustered index on ID column
Table2
ID Column ..... there's a call to get id from SCOPE_IDENTITY()
SomeColumn1
SomeColumn2
clustered index on ID column
NC idx on SomeColum1
NC idx on SomeColum2
A Sproc has the following code:
I changed the names to protect the innocent
CREATE PROCEDURE [dbo].[logging_sp]
@Audit BIGINT,
@varT1_1 NVARCHAR (50),
@varT1_2 NVARCHAR (64),
@varT1_3 INT,
@VarTime DATETIME,
@varT2_1 NVARCHAR (50),
@varT2_2 NVARCHAR (1024),
[code]....
SQL Server 2014 :: Table Locking While Insert Statement
Sep 18, 2015I have two tables for insertion in one transaction scope. Table one have 10 rows. After first table insert statement (not yet committed) if I run select on first table from other session, it holds table until my insert is committed or rolled back and from (SSMS), it display 10 rows and then wait for transaction scope till finished. My question is do I need to use no lock hint in this situation. Or there is something wrong with isolation level. One saying that in this situation table should not hols select while insert is in transaction scope.
View 5 Replies View RelatedIntegration Services :: Bulk Insert Is Locking A File Delete Task
Jun 19, 2015I have an SSIS package doing a bulk insert from a file. Then later on I'm trying to delete that file (in a file delete task), but I'm getting an error:[File System Task] Error: An error occurred with the following error message: "The process cannot access the file 'xyz' because it is being used by another process.".I'm wondering if there isn't some way to 'tweak' the bulk insert syntax so that it doesn't lock the file?
View 5 Replies View RelatedRecycling Conversations - Locking When Trying To Insert New Conversation Handle To SessionConversations Table
Feb 8, 2008
Hi,
I have implemented Remus Resanu's implementation from the Recycling Conversations article and I am experiencing locking issue when I try to insert new conversation handles to the SessionConversations table. I have copied the code in the article exactly including the activation procedure. Any ideas why I may be locking. I am thinking it is related to the HOLDLOCK hint on the table.
The sepcific line where I see locking is directly from the article:
INSERT INTO [SessionConversations] (SPID, FromService, ToService, OnContract, Handle) VALUES (...etc)
Thanks
Can I Delete The Record If Exist Before We Do Insert At The DataFlow Level?
Jan 11, 2008Can I delete the record if it exist before we do an insert at the DataFlow level base on a key of the record we are working on? Basically we want to keep history records and delete and reinsert any records that exist in the table.
View 5 Replies View RelatedSQL Server 2014 :: Best Isolation Level To Use In A Long Delete Insert Query?
Sep 23, 2015i use a single stored procedure to update many tables in sql server 2014 database, using defalut transaction isolation level we got random performance issues.
maybe it would better to use read uncommitted isolation level?
what's happens ,in the both cases( read committed, uncommitted) if the sp is called at the same time passing the same @key parameter?
this is a sample to show of the real stored procedure works:
CREATE PROCEDURE SP_Test
@Key int,
@Values1 Values1 readonly,
@Values2 Values2 readonly,
@Values3 Values3 readonly
[code]....
Conditional Split For Insert Or Update Cause Dead Lock On Database Level
Aug 28, 2007Hi
I am using conditional split Checking to see if a record exists and if so update else insert. But this cause database dead lock any one has suggestion?
Thanks
SQL Server 2014 :: Trigger On A View If Any Insert / Update Occurs On Base Table Level
Apr 21, 2015I have a situation where I have Table A, Table B.
View C is created by joining table A and table B.
I have written a instead of trigger D on view C.
I do not insert/update/delete on the view directly.
For every insert/update in table A /B the values should get insert/update in the view respectively. This insert/update on view should invoke the trigger.
And I am unable to see this trigger work on the view if any insert/update occurs on base table level.
Trigger is working only if any operation is done directly on the view.
Column Level Or Database Level Encryption/decryption....
Jan 16, 2008I want to perform column level and database level encryption/decryption....
Does any body have that code written in C# or VB.NET for AES-128, AES-192, AES-256 algorithms...
I have got code for single string... but i want to encrypt/decrypt columns and sometimes the whole database...
Can anybody help me out...
If you have Store procedure in SQL for the same then also it ll do...
Thanks in advance
High Level && Detail Level Design Documents
Nov 19, 2007
Hi,
AM in need of SSRS 2005 design documents for a project purpose. Can somebody let me know where can i find these documents? Thanks in advance
Transactions = Table Level Or Row Level ?
Nov 29, 2006When you utilize transactions in ADO.NET are the locks put on the entire TABLE used or at the row level?
For instance if you do a SELECT within a transaction if you only pull 5 rows out of a 1000 row table can you just make it lock the rows that have been pulled? It seems like it locks the entire table?
Thanks
Statement Level Vs. Row Level Triggers
Jul 20, 2005Hi..I'd very much appreciate it if someone would tell me how to translatea statement level trigger written in Oracle to its equivalent (if there isone)in MS SQL Server. Ditto for a row level trigger.If this is an old topic, I apologize. I'm very much a newbie to SQL Server.Regards,Allan M. Hart
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