Performance Gap After Some Time Of Idle.
Jan 29, 2008
Hello everybody,
I have a ASP.NET (3.5) Web site which uses an data connection to my Sql Server 2005 Express. When I browse in my data-driven pages of my website, I am satisfied with the performance. But when I try my website after a long break, e.g. in the morning, the data-driven pages take a long time to come up, about 10 seconds. After this gap, when surfing on the other pages, there is no problem. It is only the first page. So it seems that my SQL Server goes "to sleep" after a certain time of idle.
First I read a post about this problem which came up with the user instances of Sql Server. So I got rid of my user instance and set up my database "normally". But still I have that performance gap.
I am using Linq To SQL and a couple of ListViews.
I am totally confused how to manage this problem.
Any suggestions?
Thanks in advance,
Hannes
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Feb 13, 2007
Hi, everyone!
I have this strange problem... After every time my application leaves sql-server idle (doesn't send anything, doesn't retrieve anything) next command to sql-server processes really long.
I've also noticed this bug/feature/misconfiguration even if I open a DB in Management Studio...
Please, could someone tell me, is there any timer that "puts a DB to sleep" if no one is using it for some time? Can I change the way server behaves in this situation?
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Dec 7, 2007
I am using MS JDBC driver 2005 1.2 and in-house written connection pooling that was working fine for a number of years. This combination worked OK with SQLserver 2000. But recently we switched to SQLServer 2005 (x64) on WIN Server 2003 Standard x64 eddition. Everything seems work OK during business hours, however, after business hours when there are lesser users and connection stays idle for sometime, I am getting the following error:
com.microsoft.sqlserver.jdbc.SQLServerException: The connection is closed.
at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDriverError(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.checkClosed(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.setAutoCommit(Unknown Source)
at com.nms.serverframework.dbaccess.OnlineTransactionManager.freeConnection(OnlineTransactionManager.java:420)
at com.nms.serverframework.dbaccess.OnlineTransactionManager.releaseConnection(OnlineTransactionManager.java:707)
at com.nms.serverframework.dbaccess.OnlineTransactionManager.releaseConnection(OnlineTransactionManager.java:688)
at com.nms.serverframework.dbaccess.OnlineTransactionManager.finalize(OnlineTransactionManager.java:399)
at java.lang.ref.Finalizer.invokeFinalizeMethod(Native Method)
at java.lang.ref.Finalizer.runFinalizer(Finalizer.java:83)
at java.lang.ref.Finalizer.access$100(Finalizer.java:14)
Any help would be appreciated
thanks in advance
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Feb 10, 2007
I've noticed that after the database have been idle for some time, it takes up to 10 seconds to get it started when something needs to access it. In the event viewer it says that the database <name> have been started.
Obviously, there is some idle timeout setting.
I saw an option in the database properties that is called "Auto Close" which is set to true. I assume this is what i'm looking for. Can someone confirm that? (it could take some time to test myself...)
But what i'm actually wondering is:
1. Is it possible to adjust how long it would wait before timing out?
2. What advantages does closing the database bring? Does it free up (a noticeable amount of) ressources? Or is it only that it's unlocking the files, so that it's possible to copy the database source files?
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Sep 12, 2004
1. Use mssql server agent service to take the schedule
2. Use a .NET windows service with timers to call SqlClientConnection
above, which way would be faster and get a better performance?
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Jun 9, 2003
Should these two stats added together give me the time (ms) since SQL Server has been restarted? Maybe I don't understand but @@cpu_busy is the amount of time sql server has accessed the cpu and @@idle is the amount of time sql server has no cpu activity. When I add these two figures together, I don't get the total amount of time (ms) SQL Server has been running. What am I not doing? Any help is appreciated.
Thanks
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Jun 18, 2001
Hi all,
We got this message on our production server event viewer for source MSDTC.
"String message: Session idle timeout over,tearing down the session"..
Even though it is marked as informational, just wanted to know what it is?..
thanks guys,
Marx
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Sep 20, 2007
folks
We have a situation where people just login run complex queries and then just don't shut off their query analyzer of apps.
Some of these chew up a lot of CPU cycles and unless we kill the query the CPU cycles are not released.
I see some of them are idle for over 1-2 hours or more, their last_batch would be at least 2 hours old.
The question is, "Is there a setting in the sql server whereby we can automatically disconnect idle threads?"
Regards
Paresh Motiwala
Boston, USA
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Mar 21, 2006
Is it possible to stop the server from going to sleep when it is idle to improve responsiveness to new connections?
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Aug 21, 2006
I have been seeing this issue for several weeks now. The distribution agent will become idle even though there is activity occurring within the replicated database. If I manually start the distribution agent, it will begin retrieving the transactions. I thought that this might be due to inactivity but I have modified the inactivity threshold and I am not receiving an actual inactive agent warning. There are no warnings -- it simply sits there and does not resume sending transactions.
Any thoughts? This is a transactional replication with a distribution agent that is run at the subscriber.
Thanks,
MV
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Jun 8, 2005
Hi.. I have application which is connected to my SQL 2000 database. Normally our users use Terminal service to the SQL 2000 and application (same box) remotely and connect to the database. But some time the connection break and I have idle login stuck there.
For example, if I use sp_who, I can see many logins still login to DB even they are out. And sometimes I see duplicate logins too even there is only one person using that login to logon to DB. Is there a way to find out what is the idle timeout of the user login session??
Is that under SQL server properties -->remote server connections-->Query time-out--> >> sec ?
Is there a way to limit only 1 session can be allow for each login ??
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Apr 6, 2006
Hi
I have been looking at the new DMV's prefixed with dm_exec_....and found a limitation with them.
Books online says sysprocesses is replaced with sys.dm_exec_connections, sys.dm_exec_requests and sys.dm_exec_sessions. The problem I came accross is identifying any sessions connected to a specific database which were idle. This is the sort of thing you need to know if you tried to restore a database and it says the database is in use.
I wonder if this is a bug or by design?
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Mar 24, 2015
SQL Server 2014 BI
Windows 2008 R2
Every time machine is rebooted performance counters are missing.
select * from sys.dm_os_performance_counters returns no records. I execute "lodctr" command and get it back every time.
I would like to know the route cause of this issue, why it gets removed every time the machine is rebooted.
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May 29, 2008
Depending on the way I write a query, I come up with these 2 stats.
Is there a sure winner in this race, keeping in mind the overall health of the server?
(I'm not sure of the specs of the server, as I can't log on to it :/ but are there any sql variables that would show cpu speed and # of cpus?)
I almost am leaning towards the single cpu query because of lower resources used -
or are most of the "reads" in the parallel'd query not read directly from the HD, but using the Table Spool created internally (query plan shows it)?
CPU Reads Writes Duration
Parallel: 200k 3.2m 2400 62s
Solo: 79k 1.1m 600 79s
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Feb 20, 2007
Just upgraded to SQL Express 2005 from MSDE for Firehouse. Upgrade went great and the db is accessable and running fine. Except when not used for a while. Then I need to restart the db to allow connections of any kind. If I don't I get an error that the db is not accessable and I can't connect. Everything runs fine after until it goes to "sleep" on me again. We upgraded to make use of the 4GB limit as we were at 1.9GB and MSDE was getting a little unhappy.
Any suggestions? Is this a "feature" and if so, is there a script I can run to kick it into working mode again?
Thanks
Chris
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Mar 13, 2008
Does SQLServer go to sleep when it's been idle? How can I connect without an error?
I have SQLExpress on a server. Server Name is SqlExpress. I have 2 DBs on that server... Tuna & Guppy. I'm connecting to the DBs from a remote PC which runs my App... an exe created with Visual Studio 2008, Visual Basic.
If I run my App at say 9:30PM, after the server has been idle for several hours, I get a "Can't open connection to Guppy" error, which is my error message when the connection attempt fails. If I quit & relaunch the app, it connects fine, and will continue connecting fine unless you leave the server idle for serveral hours again.
If I'm developing a 2nd app all evening... which connects to a 2nd DB...Tuna, that activity seems to keep the SqlServer awake and then launching the 1st app at 9:30PM connects to Guppy just fine.
I tried adding a "Connection Timeout=30" to my connection string but that did not help.
My connection code is as follows (note the server's name is SQLExpress):
Dim strConnG As String = "Data Source=SQLEXPRESSSQLEXPRESS;Initial Catalog=Guppy;Integrated Security=True;Connection Timeout=30"
Using ConnG As New SqlConnection(strConnG)
'open Guppy connection
Try
ConnG.Open()
Catch ex As Exception
MsgBox("Can't open connection to guppy")
Return False
End Try
'Code that does stuff
End using
Can anyone tell me how to fix this so I can connect without error, even if the server has been idle?
Thank you,
Joe A
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Feb 21, 2008
Hi all;
I want to implement "Auto disconnection" (or kill) of user session that exceed a specified idle duration in SQL Server 2005.
I know how do that in oracle by creating a profile and set the IDLE_TIME paramter and asign that profile to all users. But in SQL Server i don't know how to do it.
Can anyone help me.
Kindly
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Jul 4, 2006
Hi,
We are processing 60,00, 000 rows(2 GB file) available in a flat file and loading them in to a database tables using OLEDB Destination components. In the data pipeline of an SSIS package we have 1 flat file source reader, 7 look up components(full cache mode), 1 multicast component and 2 OLE DB destinations with fast load option.
We have observed that first 10,00, 000 rows are processed and loaded in to target tables in just 4 minutes time. The second set of 10,00, 000 rows are processed in 15 minutes time. After this for processing each 1,00,000 rows SSIS is taking approximately 8 - 10 minutes time. We are not able to identify the reasons for the unexpected behaviour of SSIS.
We thought that as the input file size is 2 GB SSIS is not able to manage and slowing down over time of execution. We did split the big input file in to 60 small 37 MB (approx) size files. Then we modified the package by adding For-Each loop task to process all the 60 small files and load them in to database server sequentially. Even in this approach also we have identified data loading has slowed down drastically after processing 13 files.
In order to verify is there any problem with reading source file or transformation, we have replaced OLEDB destinations component with Flat File destinations. With Flat file destination the time taken for processing rows is very constant. For every 8 minutes package is able to process 10,00,000 rows and write them in to the destination files. So, there is no problem with the with either Look up components or flat file source reader.
We are sure that target database server is in same state/condition from the starting to the end of package execution. The client box in which we are running the package is having 1 GB RAM. During package execution time the CPU usage is at 30 % and PF usage is 580 MB. SP1 is also installed on both Client and Server.
Does any one have clue what is causing slow down of data load over the time of package execution?
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Aug 25, 2015
I know I should probably be posting this in the RS section but I have a Win 2008 R2 server and RS 2012 along with SSIS and Database server installed. I also have SQL 2005 instance with Sql 2005 SSIS running on the server.
I saw that Reporting services was consuming 9gb of ram a few days ago with no published reports. It's just a default install.
So I investigated the settings and the document: [URL]......
I added this section to the reportserver.config file to restrict memory usage
<WorkingSetMaximum>512000</WorkingSetMaximum>
<WorkingSetMinimum>128000</WorkingSetMinimum>
Any example altering the reportserver.config file in your standard build of sql server reporting services?
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Feb 21, 2007
We recently implemented merge replication.We were expereincing. The replication is between 2 SQL Servers (2005) over same network box, and since we have introduced the replication, the performance has degraded considerably on subscriber end.
1) One thing that should be mention is that its a "unidirectional Direction" flow of changes is from publisher towards subscriber (only one publisher and distributor as well and one subscriber ).
2) Updates are high than inserts and only one article let say "Article1" ave update up to 2000 per day and i am experiecing that dbo.MSmerge_upd_sp_Article1_GUID taking more cpu time.what should be do..
on subscriber database response time is going to slow and i am experiencing a lot of number of LOCK time outs on application end.
can any one can also suggest me server level settings for aviding locking time out.
looking for any experieced solution/suggestion.
Thanks in advance.
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Oct 21, 1999
Hello:
We have a new sales force automation application for sales rep to log their contacts, etc. It runs on mssql 6.5, sp 4.
They log in and leave their connections on without logging off or leave their coonections idle .
We set the user connections fiarly high but we are concerned that the max amount of user connections weill be consumed and the sql serve becomes locked.
My questions are:
1) Is there any parameter in the sql server configuration that will log off idle users have a certain time and dsiconnect them?
2) A backup of the database will be made each night. If there is no parameter, would it be a good idea to stop and start the sql server every night to release the idle connections?
3) If so, how to stop sql server from the commadn and start it with a command line command and do this in a batch file as a scheduled task?
4) Is there any other way to release these idle connections each night?
Any information you can supply will be appreciated. THanks.
David Spaisman
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Aug 7, 2007
Hi all,
I have created a report in SSRS 2005 which is being viewed by users from different Time Zones.
I have a dataset which has a field of type datetime (UTC). Now I would like to display this Date according to the User Time Zone.
For example if the date is August 07, 2007 10:00 AM UTC,
then I would like to display it as August 07, 2007 03:30 PM IST if the user Time Zone is IST.
Similarly for other Time Zones it should display the time accordingly.
Is this possible in SSRS 2005?
Any pointers will be usefull...
Thanks in advance
sudheer racha.
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Oct 13, 2004
Here's the DB Connection code for a site (Web.config file)
I was wondering how I could specify an idle timeout or orphan timeout.
I tried idle timeout=x and kept getting errors
<add key="DBConn"
value="server=localhost;Trusted_Connection=true;database=SaltwaterFishing;Min Pool
Size=5;Max Pool Size=150;"></add>
Thank you
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Jun 23, 2006
Hello Everyone,I have a very complex performance issue with our production database.Here's the scenario. We have a production webserver server and adevelopment web server. Both are running SQL Server 2000.I encounted various performance issues with the production server with aparticular query. It would take approximately 22 seconds to return 100rows, thats about 0.22 seconds per row. Note: I ran the query in singleuser mode. So I tested the query on the Development server by taking abackup (.dmp) of the database and moving it onto the dev server. I ranthe same query and found that it ran in less than a second.I took a look at the query execution plan and I found that they we'rethe exact same in both cases.Then I took a look at the various index's, and again I found nodifferences in the table indices.If both databases are identical, I'm assumeing that the issue is relatedto some external hardware issue like: disk space, memory etc. Or couldit be OS software related issues, like service packs, SQL Serverconfiguations etc.Here's what I've done to rule out some obvious hardware issues on theprod server:1. Moved all extraneous files to a secondary harddrive to free up spaceon the primary harddrive. There is 55gb's of free space on the disk.2. Applied SQL Server SP4 service packs3. Defragmented the primary harddrive4. Applied all Windows Server 2003 updatesHere is the prod servers system specs:2x Intel Xeon 2.67GHZTotal Physical Memory 2GB, Available Physical Memory 815MBWindows Server 2003 SE /w SP1Here is the dev serers system specs:2x Intel Xeon 2.80GHz2GB DDR2-SDRAMWindows Server 2003 SE /w SP1I'm not sure what else to do, the query performance is an order ofmagnitude difference and I can't explain it. To me its is a hardware oroperating system related issue.Any Ideas would help me greatly!Thanks,Brian T*** Sent via Developersdex http://www.developersdex.com ***
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Jun 22, 2006
Hello Everyone,I have a very complex performance issue with our production database.Here's the scenario. We have a production webserver server and adevelopment web server. Both are running SQL Server 2000.I encounted various performance issues with the production server witha particular query. It would take approximately 22 seconds to return100 rows, thats about 0.22 seconds per row. Note: I ran the query insingle user mode. So I tested the query on the Development server bytaking a backup (.dmp) of the database and moving it onto the devserver. I ran the same query and found that it ran in less than asecond.I took a look at the query execution plan and I found that they we'rethe exact same in both cases.Then I took a look at the various index's, and again I found nodifferences in the table indices.If both databases are identical, I'm assumeing that the issue isrelated to some external hardware issue like: disk space, memory etc.Or could it be OS software related issues, like service packs, SQLServer configuations etc.Here's what I've done to rule out some obvious hardware issues on theprod server:1. Moved all extraneous files to a secondary harddrive to free up spaceon the primary harddrive. There is 55gb's of free space on the disk.2. Applied SQL Server SP4 service packs3. Defragmented the primary harddrive4. Applied all Windows Server 2003 updatesHere is the prod servers system specs:2x Intel Xeon 2.67GHZTotal Physical Memory 2GB, Available Physical Memory 815MBWindows Server 2003 SE /w SP1Here is the dev serers system specs:2x Intel Xeon 2.80GHz2GB DDR2-SDRAMWindows Server 2003 SE /w SP1I'm not sure what else to do, the query performance is an order ofmagnitude difference and I can't explain it. To me its is a hardware oroperating systemrelated issue.Any Ideas would help me greatly!Thanks,Brian T
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Apr 25, 2014
Sample Table
USE [Testing]
GO
/****** Object: Table [dbo].[Testing] Script Date: 4/25/2014 11:08:18 AM ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
[Code] ....
It seems to work fine with one million records.
Each primary key is unique, but the begindate is non-unique, and i guess even if i use datetime2 and add nanoseconds, from what i have read, there is a chance that i could have a duplicate datetime since the date is imported via XML from multiple sources.
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Jun 11, 2015
Is there a way to keep track in real time on how long a stored procedure is running for? So what I want to do is fire off a trace in a stored procedure if that stored procedure is running for over like 5 minutes.
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Oct 22, 2015
I am trying to load previous days data at 3 am via a SSIS job.
The Date variable is initiated as DATEADD("dd",-1, GETDATE()) in the for loop.
Now, as this job runs at 3 am, and I set the variable as GETDATE() - 1, it excluded the data from 12 am to 3 am in the resultset as Date is set as YYYY-MM-DD 03:00:00:000 I need this to be set as YYYY-MM-DD 00:00:00:000
How can i do this?Â
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Oct 3, 2015
I hope to update a DateTime column value with a Time input parameter.  Poor attempt below but it looks like the @ApptTime param is coming in as 10:45:00.0000000 and I might have an existing @SendOnDate as: 2015-10-05 07:00:00.000...I hope to end up with 2015-10-05 10:45:00.000
ALTER PROCEDURE [dbo].[SendEditUPDATE]
@QuePoolID int=null
,@ApptTime time(7)
,@SendOnDate datetime
[code]...
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Dec 15, 2006
I am using VS2005 (VB) to develop a PPC WM5.0 Program. And I am using SQLCE 3.0. My PPC Hardware is in 400MHz.
The question is when the program try to insert the first record into sdf database after each time the program started. It takes a long time. Does anyone know why and how can I fix it?
I will load the whole database into a dataset when the program start and do all the "Insert", "Update", "Delete" in this dataset and fill it into database after each action.
cn.Open()
sda = New SqlCeDataAdapter(SQL, cn) 'SQL = Select * From Table
scb = New SqlCeCommandBuilder(sda)
sda.Update(dataset)
cn.Close()
I check the sda.update(), it takes about 0.08s for filling one record into database normally. But:
1. Start the PPC Program
2. Load DB into dataset
3. Create a ONE new record in dataset
4. Fill back to DB
When I take this four steps everytime, the filling time is almost 1s or even more!
Actually, 0.08s is just a normal case. Sometimes, it still takes over 1s to filling back a dataset which only inserted one record when the program is running. (Even all inserted records are exactly the same in data jsut different in the integer key)
However, when I give up the dataset and using the following code:
cn.Open()
Dim cmd As New SqlCeCommand(SQL, cn) ' I have build the insert SQL before (Insert Into Table values(XXXXXXXXXXXXXXX All field)
cmd.CommandType = CommandType.Text
cmd.ExecuteNonQuery()
cn.Close()
StartTime = Environment.TickCount
I found that it is still the same that the first inserted record takes more time, but just about 0.2s. And the normal insert time is around 0.02s. It is 4 times faster!!!
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Apr 21, 2015
SELECTÂ
  CONVERT(VARCHAR(10),attnc_chkin_dt,101) as INDATE,
  CONVERT(VARCHAR(10),attnc_chkin_dt,108) as TimePart
FROM pmt_attendance
o/p
indate   04/18/2015
time part :17:45:00
I need to convert this 17:45:00 to 12 hours date format...
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Nov 12, 2007
Hi,
We need to select rows from the database that have been recently inserted/updated. We have a main primary table (COMMIT_TEST) and a second update table (COMMIT_TEST_UPDATE). The update table contains the primary key and a LAST_UPDATE field which is a datetime (to tell us when an update occurred). Triggers on the primary table are used to populate the update table.
If we insert or update the primary table in a transaction, we would expect that the datetime of the insert/update would be at the commit, however it seems that the insert/update statement is cached and getdate() is executed at the time of the cache instead of the commit. This causes problems as we select rows based on LAST_UPDATE and a commit may occur later but the earlier insert timestamp is saved to the database and we miss that update.
We would like to know if there is anyway to tell the SQL Server to not execute the function getdate() until the commit, or any other way to get the commit to create the correct timestamp.
We are using default isolation level. We have tried using getdate(), current_timestamp and even {fn Now()} with the same results. SQL Queries that reproduce the problem are provided below:
/* Different functions to get current timestamp €“ all have been tested to produce the same results */
/*
SELECT GETDATE()
GO
SELECT CURRENT_TIMESTAMP
GO
SELECT {fn Now()}
GO
*/
/* Use these statements to delete the tables to allow recreate of the tables */
/*
DROP TABLE COMMIT_TEST
DROP TABLE COMMIT_TEST_UPDATE
*/
/* Create a primary table and an UPDATE table to store the date/time when the primary table is modified */
CREATE TABLE dbo.COMMIT_TEST (PKEY int PRIMARY KEY, timestamp) /* ROW_VERSION rowversion */
GO
CREATE TABLE dbo.COMMIT_TEST_UPDATE (PKEY int PRIMARY KEY, LAST_UPDATE datetime, timestamp ) /* ROW_VERSION rowversion */
GO
/* Use these statements to delete the triggers to allow reinsert */
/*
drop trigger LOG_COMMIT_TEST_INSERT
drop trigger LOG_COMMIT_TEST_UPDATE
drop trigger LOG_COMMIT_TEST_DELETE
*/
/* Create insert, update and delete triggers */
create trigger LOG_COMMIT_TEST_INSERT on COMMIT_TEST for INSERT as
begin
declare @time datetime
select @time = getdate()
insert into COMMIT_TEST_UPDATE (PKEY,LAST_UPDATE)
select PKEY, getdate()
from inserted
end
GO
create trigger LOG_COMMIT_TEST_UPDATE on COMMIT_TEST for UPDATE as
begin
declare @time datetime
select @time = getdate()
update COMMIT_TEST_UPDATE
set LAST_UPDATE = getdate()
from COMMIT_TEST_UPDATE, deleted, inserted
where COMMIT_TEST_UPDATE.PKEY = deleted.PKEY
end
GO
/* In our application deletes should never occur so we don€™t log when they get modified we just delete them from the UPDATE table */
create trigger LOG_COMMIT_TEST_DELETE on COMMIT_TEST for DELETE as
begin
if ( select count(*) from deleted ) > 0
begin
delete COMMIT_TEST_UPDATE
from COMMIT_TEST_UPDATE, deleted
where COMMIT_TEST_UPDATE.PKEY = deleted.PKEY
end
end
GO
/* Delete any previous inserted record to avoid errors when inserting */
DELETE COMMIT_TEST WHERE PKEY = 1
GO
/* What is the current date/time */
SELECT GETDATE()
GO
BEGIN TRANSACTION
GO
/* Insert a record into the primary table */
INSERT COMMIT_TEST (PKEY) VALUES (1)
GO
/* Simulate additional processing within this transaction */
WAITFOR DELAY '00:00:10'
GO
/* We expect at this point that the date is written to the database (or at least we need some way for this to happen) */
COMMIT TRANSACTION
GO
/* get the current date to show us what date/time should have been committed to the database */
SELECT GETDATE()
GO
/* Select results from the table €“ we see that the timestamp is 10 seconds older than the commit, in other words it was evaluated at */
/* the insert statement, even though the row could not be read with a SELECT as it was uncommitted */
SELECT * FROM COMMIT_TEST
GO
SELECT * FROM COMMIT_TEST_UPDATE
Any help would be appreciated, we understand we could make changes to the application/database to approximate what we need, but all the solutions have identified suffer from possible performance issues, or could still lead to missing deals (assuming the commit time is larger than some artifical time window).
Regards,
Mark
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Sep 21, 2015
I need to do a time test for restoring an Azure SQL database from a point in time. Can I automate this through PowerShell.
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