Jdbc Performance Issuses With 2005 Vs 2000
Aug 18, 2006
I cannot get performance out of sql server 2005 through jdbc connections.
I have used multiple drivers against 2000 and 2005. 2000 always comes out on top.
I installed the os the same, configured the raid array the same, configured the os the same, configured the database the same, installed the software the same, etc.
It seems to come down to the jdbc driver and the way the database handles batch requests from jdbc. Is there some configuration in 2005 that I need to alter to improve the performance of batched inserts through the jdbc driver?
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Mar 12, 2008
I've got an import app written in Java. One table I'm importing from contains 22 million records. When I run the app in a 2000 environment, I have my max heap set at 512, and the table gets imported. When I run in a 2005 environment, I have to change the max heap to 1152 or it will error out with a similiar error:
com.microsoft.sqlserver.jdbc.SQLServerException: The system is out of memory. Use server side cursors for large result sets:Java heap space. Result set size:854,269,999. JVM total memory size:1,065,484,288. (<--this is with max heap at 1024)
what is the difference between the 2000 and 2005 JDBC that I have to set max heap in one and not the other?
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Oct 5, 2006
Hi,
I'm using JDBC driver for Server 2005 (version 1.1.1501) to access Server 2000. I have no problems reading my data, but every update returns "Cursor is READ ONLY".
If I use driver for Server 2000 I have no problems. And I have no problems running the same program with 2005 driver against SQL Server Express.
Where should I start debugging?
Thank you,
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Jun 22, 2007
I have sql 2000 running with a client database that is about 200 people per day. A VB front end runs it. I have some problems with performance. Would upgrading to Sql 2005 improve my database performance?
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Nov 22, 2007
Hi all.
Context: SQL 2000, JDBC 1.2
I have a query with 9 parameters that run as follows (approximate timing):
1. Using prepared statement: 1,7 sec
2. Re-using the same statement: 1,7 sec
3. Using prepared statement, no parameters (the params are hardcoded): 20 ms
4. Using statement+resultset+rs.getFirst: 20 ms
5. from inside SQL analyzer: instantly
So, I observe a problem when using parameters. Do I miss something, do I have to do something?
If the actual query may help, I will post it promptly.
Thx in advance
Denis
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Oct 18, 2007
Hi all,
We are in the process of upgrading a sql 2000 database over to 2005 and have noticed some substancial performance drops with scalar udfs in 2005.
I have already read the following post
http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=491984&SiteID=1
and recognise that udfs are not the most performant option in the first place, but was surprised how much slower these have become on 2005.
Has anyone else had this sort of issue, we really don't want to go away from the udf's but would like to know if there is a design issue within a udf that might be causing this (or even a usage issue). What I am getting as is: Is there certain types of queries, or keywords that should be avoided in udfs on 2005?
A simple example we have is a udf that returns an exchange rate stored in the db, this has parameters of "from currency", "to currency", and date.
SET @ret = ( SELECT TOP 1 TELE_TRANSFER_RATE
FROM dbo.EXCHANGE_RATES
WHERE EXCH_CURRENCY_NO = @from
AND CURRENCY_NO = @to
AND RATE_DATE <= @date
ORDER BY RATE_DATE DESC )
RETURN @ret
And then this is called from a script that returns financials, standard select statement, with udf call in select clause.
Any comments?
Thanks in advance.
Clint Colefax
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Feb 10, 2008
Hi guys
We are in the process of moving from SQL Server 2000 to 2005. In this process in general I have noticed that performance is better as a result of the move but in a couple of specific cases performance is about 10 time worse as a result of the move and i am wondering if anyone can tell me why.
1) Should I be noticing that calling functions from within a where clause are slower in 2005.
2) Has the and/or logic processing been changed between the different versions.
3) Why does this segment of code run really slow in 2005 but really fast in 2000 (note, i know that its not nice looking but it is pre-existing code from before we came on board and there are more examples of these so its a bit of a change to go through and fix it all up to what it should be but i need to know why before i can move on and as i said i know its not nice and one should expect it to be slow but i specially need to know why it would run fine in 2000 and not on 2005):
.....
AND (Deleted = 0)
AND (DATEDIFF(d, dbo.GetStartOfDate(ReviewedDate), dbo.GetStartOfDate(GETDATE())) = 3)
OR (ProgressPointId = 32)
AND (Deleted = 0)
AND (DATEDIFF(d, dbo.GetStartOfDate(ReviewedDate), dbo.GetStartOfDate(GETDATE())) = 3)
OR (ProgressPointId = 30)
AND (Deleted = 0)
AND (DATEDIFF(d, dbo.GetStartOfDate(ReviewedDate), dbo.GetStartOfDate(GETDATE())) = 3)
....
Thanks for your help.
Anthony
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May 15, 2008
I was hoping I wouldn't be another poster with performance issues after migrating to SQl 2005 from SQL 2000 but here I am.
I am in the process of testing out our databases on Sql Server 2005 for migration from SQL Server 2000 and there are certain portions of code that have been affected negatively. I have read thru many of the posts here and have tried out most of the recommendations. I will start out with things I've done and then provide the actual SQL.
1) I have rebuilt all indexes ( using the DBCC REINDEX using the table option).
2) Updated the db engine to latest hot fix (build 3239) that addresses speed related fixes.
3) I also ran sp_createstats using the 'fullscan' option to create stats on all columns of all tables (minus indexed columns)
4) Since nothing seemed to work, I even ran UPDATE STATICS with FULL SCAN on all tables even though I did not need it as the REBUILD woudl have created stats. But I was willing to try anything.
I have confirmed that the execution plans are different even though the data on both sql 2000 and sql 2005 are identical (i put a copy on 2005). The plans themselves are huge as the queries are huge. Here is the query.
SELECT InterimView.* ,TestView.*
FROM View_LabDataExport_TestFormData_55 TestView
RIGHT OUTER JOIN ( SELECT ReqView.*, CDView.*
FROM View_LabDataExport_FormData_55 ReqView
LEFT OUTER JOIN View_LabDataExport_FormData_CD_55 CDView
ON ( CDView.DB_SubjectID_CD = ReqView.DB_SUbjectID )
) InterimView
ON ( InterimView.DB_FormID = TestView.DB_FormID_T AND
InterimView.DB_LabSampleID = TestView.DB_LabSampleID_T )
The above query takes abotu 8 secs to run on 2000 and about 1 minute to run on 2005. This is for a small dataset and on larger datasets this is only going to more pronounced ( as confirmed by other teams that have already migrated in my company). Another point worth mentioning might be if I remove the TestView.* from the select list, it works in 5 to 6 seconds. Is there an issue with Sql 2005 and a large number of columns or anything of that sort? On 2000, the time remains the same , about 8 seconds if I remove this from the select list.
Here is the statistics ion on 2005
(21234 row(s) affected)
Table 'Worktable'. Scan count 75490, logical reads 3676867, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'LabTestToReportPanel'. Scan count 476, logical reads 1524, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'LabReportPanel'. Scan count 0, logical reads 260, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'DiscreteValue'. Scan count 1, logical reads 176106, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'LabReleasedSampleTest'. Scan count 1, logical reads 2078, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'LabSample'. Scan count 1360, logical reads 18567, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'Form'. Scan count 2302, logical reads 8225, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'LabTest'. Scan count 1, logical reads 23, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'LabSampleDef'. Scan count 1, logical reads 10530, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'LabArea'. Scan count 1, logical reads 2, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'Lab'. Scan count 1, logical reads 2, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'Location'. Scan count 1, logical reads 2, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'Study'. Scan count 0, logical reads 6, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'Item'. Scan count 1335, logical reads 32940, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'ObjectState'. Scan count 1, logical reads 10972, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'Object'. Scan count 0, logical reads 20674, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'Subject'. Scan count 0, logical reads 3293, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'FormDef'. Scan count 2, logical reads 70, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'PrintedLabSampleLabel'. Scan count 0, logical reads 13144, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'PrintedForm'. Scan count 0, logical reads 4219, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'StudySite'. Scan count 0, logical reads 2756, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'StudyEvent'. Scan count 18, logical reads 40, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'StudyEventDef'. Scan count 0, logical reads 36, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'FormDefToStudyEventDef'. Scan count 1, logical reads 43, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'LabSampleDefToFormDef'. Scan count 1, logical reads 255, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Here is the statistics ion on 2000
Table 'LabTestToReportPanel'. Scan count 2123, logical reads 4820, physical reads 44, read-ahead reads 0.
Table 'LabReportPanel'. Scan count 130, logical reads 260, physical reads 0, read-ahead reads 0.
Table 'DiscreteValue'. Scan count 103914, logical reads 208214, physical reads 0, read-ahead reads 0.
Table 'Location'. Scan count 19031, logical reads 38062, physical reads 2, read-ahead reads 0.
Table 'Lab'. Scan count 19031, logical reads 38062, physical reads 0, read-ahead reads 0.
Table 'LabArea'. Scan count 19031, logical reads 38062, physical reads 0, read-ahead reads 0.
Table 'LabSampleDef'. Scan count 24670, logical reads 49340, physical reads 0, read-ahead reads 0.
Table 'LabTest'. Scan count 19406, logical reads 39575, physical reads 0, read-ahead reads 0.
Table 'LabReleasedSampleTest'. Scan count 4289, logical reads 73865, physical reads 1014, read-ahead reads 24.
Table 'Study'. Scan count 4291, logical reads 8582, physical reads 0, read-ahead reads 0.
Table 'LabSample'. Scan count 5647, logical reads 31382, physical reads 308, read-ahead reads 4.
Table 'Form'. Scan count 4291, logical reads 9272, physical reads 2, read-ahead reads 10.
Table 'PrintedLabSampleLabel'. Scan count 4289, logical reads 17097, physical reads 114, read-ahead reads 308.
Table 'ObjectState'. Scan count 6860, logical reads 13760, physical reads 1, read-ahead reads 0.
Table 'Object'. Scan count 6860, logical reads 23559, physical reads 90, read-ahead reads 701.
Table 'PrintedForm'. Scan count 1375, logical reads 4505, physical reads 40, read-ahead reads 16.
Table 'StudySite'. Scan count 1378, logical reads 2756, physical reads 4, read-ahead reads 0.
Table 'Subject'. Scan count 1599, logical reads 3332, physical reads 2, read-ahead reads 0.
Table 'StudyEvent'. Scan count 18, logical reads 52, physical reads 0, read-ahead reads 0.
Table 'StudyEventDef'. Scan count 18, logical reads 54, physical reads 0, read-ahead reads 2.
Table 'FormDefToStudyEventDef'. Scan count 1, logical reads 69, physical reads 0, read-ahead reads 23.
Table 'FormDef'. Scan count 2, logical reads 78, physical reads 1, read-ahead reads 4.
Table 'LabSampleDefToFormDef'. Scan count 1, logical reads 308, physical reads 1, read-ahead reads 306.
Table 'Item'. Scan count 1335, logical reads 36510, physical reads 140, read-ahead reads 1047.
(21234 row(s) affected)
(147 row(s) affected)
One difference between the two is the work table that 2005 creates versus 2000. I can attach the plans but they are huge. I will attach it if you ask.
What I was looking for was suggestions on what I could do short of rewriting code or any suggestions in general.
Thanks
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Mar 11, 2008
What are the ways to do that ?
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Aug 14, 2007
I need to show my boss that 2005 will on average be faster than 2000.
Are there any performance benchmark results available to show this?
Also I need similar benchmarks to show 64 bit will be faster than 32 bit SQL 2005.
Ian
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May 15, 2008
I was hoping I wouldn't be another poster with performance issues after migrating to SQl 2005 from SQL 2000 but here I am.
I am in the process of testing out our databases on Sql Server 2005 for migration from SQL Server 2000 and there are certain portions of code that have been affected negatively. I have read thru many of the posts here and have tried out most of the recommendations. I will start out with things I've done and then provide the actual SQL.
1) I have rebuilt all indexes ( using the DBCC REINDEX using the table option).
2) Updated the db engine to latest hot fix (build 3239) that addresses speed related fixes.
3) I also ran sp_createstats using the 'fullscan' option to create stats on all columns of all tables (minus indexed columns)
4) Since nothing seemed to work, I even ran UPDATE STATICS with FULL SCAN on all tables even though I did not need it as the REBUILD woudl have created stats. But I was willing to try anything.
I have confirmed that the execution plans are different even though the data on both sql 2000 and sql 2005 are identical (i put a copy on 2005). The plans themselves are huge as the queries are huge. Here is the query.
SELECT InterimView.* ,TestView.*
FROM View_LabDataExport_TestFormData_55 TestView
RIGHT OUTER JOIN ( SELECT ReqView.*, CDView.*
FROM View_LabDataExport_FormData_55 ReqView
LEFT OUTER JOIN View_LabDataExport_FormData_CD_55 CDView
ON ( CDView.DB_SubjectID_CD = ReqView.DB_SUbjectID )
) InterimView
ON ( InterimView.DB_FormID = TestView.DB_FormID_T AND
InterimView.DB_LabSampleID = TestView.DB_LabSampleID_T )
The above query takes abotu 8 secs to run on 2000 and about 1 minute to run on 2005. This is for a small dataset and on larger datasets this is only going to more pronounced ( as confirmed by other teams that have already migrated in my company). Another point worth mentioning might be if I remove the TestView.* from the select list, it works in 5 to 6 seconds. Is there an issue with Sql 2005 and a large number of columns or anything of that sort? On 2000, the time remains the same , about 8 seconds if I remove this from the select list.
Here is the statistics ion on 2005
(21234 row(s) affected)
Table 'Worktable'. Scan count 75490, logical reads 3676867, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'LabTestToReportPanel'. Scan count 476, logical reads 1524, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'LabReportPanel'. Scan count 0, logical reads 260, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'DiscreteValue'. Scan count 1, logical reads 176106, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'LabReleasedSampleTest'. Scan count 1, logical reads 2078, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'LabSample'. Scan count 1360, logical reads 18567, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'Form'. Scan count 2302, logical reads 8225, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'LabTest'. Scan count 1, logical reads 23, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'LabSampleDef'. Scan count 1, logical reads 10530, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'LabArea'. Scan count 1, logical reads 2, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'Lab'. Scan count 1, logical reads 2, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'Location'. Scan count 1, logical reads 2, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'Study'. Scan count 0, logical reads 6, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'Item'. Scan count 1335, logical reads 32940, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'ObjectState'. Scan count 1, logical reads 10972, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'Object'. Scan count 0, logical reads 20674, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'Subject'. Scan count 0, logical reads 3293, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'FormDef'. Scan count 2, logical reads 70, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'PrintedLabSampleLabel'. Scan count 0, logical reads 13144, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'PrintedForm'. Scan count 0, logical reads 4219, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'StudySite'. Scan count 0, logical reads 2756, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'StudyEvent'. Scan count 18, logical reads 40, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'StudyEventDef'. Scan count 0, logical reads 36, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'FormDefToStudyEventDef'. Scan count 1, logical reads 43, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Table 'LabSampleDefToFormDef'. Scan count 1, logical reads 255, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Here is the statistics ion on 2000
Table 'LabTestToReportPanel'. Scan count 2123, logical reads 4820, physical reads 44, read-ahead reads 0.
Table 'LabReportPanel'. Scan count 130, logical reads 260, physical reads 0, read-ahead reads 0.
Table 'DiscreteValue'. Scan count 103914, logical reads 208214, physical reads 0, read-ahead reads 0.
Table 'Location'. Scan count 19031, logical reads 38062, physical reads 2, read-ahead reads 0.
Table 'Lab'. Scan count 19031, logical reads 38062, physical reads 0, read-ahead reads 0.
Table 'LabArea'. Scan count 19031, logical reads 38062, physical reads 0, read-ahead reads 0.
Table 'LabSampleDef'. Scan count 24670, logical reads 49340, physical reads 0, read-ahead reads 0.
Table 'LabTest'. Scan count 19406, logical reads 39575, physical reads 0, read-ahead reads 0.
Table 'LabReleasedSampleTest'. Scan count 4289, logical reads 73865, physical reads 1014, read-ahead reads 24.
Table 'Study'. Scan count 4291, logical reads 8582, physical reads 0, read-ahead reads 0.
Table 'LabSample'. Scan count 5647, logical reads 31382, physical reads 308, read-ahead reads 4.
Table 'Form'. Scan count 4291, logical reads 9272, physical reads 2, read-ahead reads 10.
Table 'PrintedLabSampleLabel'. Scan count 4289, logical reads 17097, physical reads 114, read-ahead reads 308.
Table 'ObjectState'. Scan count 6860, logical reads 13760, physical reads 1, read-ahead reads 0.
Table 'Object'. Scan count 6860, logical reads 23559, physical reads 90, read-ahead reads 701.
Table 'PrintedForm'. Scan count 1375, logical reads 4505, physical reads 40, read-ahead reads 16.
Table 'StudySite'. Scan count 1378, logical reads 2756, physical reads 4, read-ahead reads 0.
Table 'Subject'. Scan count 1599, logical reads 3332, physical reads 2, read-ahead reads 0.
Table 'StudyEvent'. Scan count 18, logical reads 52, physical reads 0, read-ahead reads 0.
Table 'StudyEventDef'. Scan count 18, logical reads 54, physical reads 0, read-ahead reads 2.
Table 'FormDefToStudyEventDef'. Scan count 1, logical reads 69, physical reads 0, read-ahead reads 23.
Table 'FormDef'. Scan count 2, logical reads 78, physical reads 1, read-ahead reads 4.
Table 'LabSampleDefToFormDef'. Scan count 1, logical reads 308, physical reads 1, read-ahead reads 306.
Table 'Item'. Scan count 1335, logical reads 36510, physical reads 140, read-ahead reads 1047.
(21234 row(s) affected)
(147 row(s) affected)
One difference between the two is the work table that 2005 creates versus 2000. I can attach the plans but they are huge. I will attach it if you ask.
What I was looking for was suggestions on what I could do short of rewriting code or any suggestions in general.
FYI, this has also been posted on the SQL Server Engine forum.
Thanks
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May 10, 2007
I have read another thread on this, but I wanted to ask a little more generally, what makes this happen?
The app I got called on is a SQL Server database with an Access front end and a web app front end. The database was on an old machine with SQL Server 2000 and it performed adequately. Then they bought a new high end machine, brought the database over in SQL 2005 and it performs worse than before.
So when I see it, I will check the usual hardware issues but I don't think there will be any.
So the question is, all else being the same, what are the usual things that cause slowness in going from 2000 to 2005?
Do you need to redo indexes? Recompile procs and views?
Any thoughts/ideas much appreciated.
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Jan 5, 2006
Hi all,
I am wondering if anyone has similar experience.
I did the migration by detaching the database from SQL 2000 running on W2K Pro and attaching it to SQL 2005 running on XP Pro. Some queries with simple aggregate functions such as AVG() have been slowed by at least an order of magnitude. I understand that SQL server can intelligently adapt to improve the performance. I am not sure how much it can improve at this point of time.
H
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Aug 1, 2007
Hi,
I'm having an issue with a query I'm running on Sql Server 2005. It's a semi-complex query involving an in-line table function and several left outer joins which are joined on to the results of the function call. Two of the left outer joins are then qualified in a where clause of the form where table.Col is not null; the idea is that the final result set contains data that has no match in those two tables.
The problem revolves around a where clause in the function and the last left outer join (ie, one of the ones qualified with where not null). When I alter the where clause of the function to further restrict the result set the function returns, the query times shoots up from 1 second to roughly 2-3 minutes. Note that the time the function takes to complete is not affected. The difference in time is purely down to what the query does with the results the function provides. Also note that the change to the where clause provides a subset of the original data; it does not add any more data (it actually restricts the original resultset by roughly 1000 rows).
I can bring the query speed back down again by removing the last left outer join - this join takes one of the columns from the function, and joins it to a small table - 924 rows. So it appears that this particular join is the cause of the issue, but only when using the resultset generated from the modified function query.
Now, as the thread title alludes, Sql Server 2000 and 2005 handle this differently, or appear to. When I execute this same query on a Sql 2000 machine, there's no apparent time differences, and the data that is returned is as expected. Does anyone have any suggestions as to what might be causing this and how I can fix it? I could simply return the larger resultset and use managed code to filter out the rows I don't want; however, I would like to get to the bottom of this, especially if it's going to effect future queries.
Cheers,
Chris
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Jul 20, 2005
Hi,I have a problem to set a JDBC connection as READ UNCOMMITED.setTransactionIsolation(Connection.TRANSACTION_REA D_UNCOMMITTED)This is causing lots of blocking on tablesand update or insert doesn't work properly.Does anyone have any idea what I'm missing here?I asked i-net support and they suggested to callsetAutoCommit(false) after the above functionand it didn't work.also suggested impltrans = true, and I changed that option on SQLand it caused more blocking.Thanks in advance for any info.
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Sep 21, 2007
Hello,
We previously having two servers A and B. Server A is used for updation of data and the data then replicated to server B. Server B is used for
Server A :
purpose : used for database updation/ modification
SQL Server version : SQL Server 2000 SP 2
Server Z :
purpose : used for Reporting
SQL Server version : SQL Server 2000 SP 2
We were doing Transactional replication from Server A to Server B.
Last month we have broght another server (Server B) with same hardware configuration but having SQL SERVER 2005 installed. This is to speed up our database update process. We have moved some of the database on this new server so that we can achieve our deadlines.
Server B :
purpose : used for database updation/ modification
SQL Server version : SQL Server 2005
I have set up the transactional replication from Server B to Server Z and replication works fine.
However, the issue is after it is started replicating from this new server (Server B) performance of all the queries reduced a lot.(making my life harder)
I didnt expected this as our reporting server is still SQL server 2000.
I have restored the backup of database which was replicated from server A (sql server 2000) and compared execution plan for one of our common query (which is used in most of the reports and which is now taking longer time to provide results)
I found that database which is replicated from Server B (Sql server 2005) is having primary keys. which was not present in the database which replicated from server A(Sql server 2000).
I have then removed the primary key and make the indexes same as previous copy of database(which was replicated from server A) But still the query takes long time.
Execution plan now shows "Table Spool" which was not present in previous copy of database.
Almost every query for this database is taking longer time now.
Can someone suggest me what is wrong and what should I need to fix.
Am I going on the right direction?
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Aug 23, 2007
Hi I am trying to load a bunch of excel files into a table and running into tables
I create a seq container--> add a foreach loop control task configure a variable thats ok as I am displaying the files names through script
I am stuck as how to configure the next data flow task to load into a destination
I create a source excel and then map the expression to the variable but the destination SQL connection is not able to see this one
Any ideas what I am doing wrong
Thanks
Po
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Dec 29, 2006
Hi,
Recently we have migrated our application from MSDE 2000 to SQL Server Express 2005(SP 1). This has significantly reduced the performance of our Windows.NET application which is developed using C#.
For example : While logging in to the application two databases are being attached.
Time taken in MSDE: 16 secs
Time taken in SQL Server Express 2005 : 58 secs
Also note performance is degraded for normal screens where data is retrived from database using inline queries.
Questions:
1) Is there any special(optimum) configuration(installation parameters) while installing the SQL Server Express 2005 setup?
2) Is there any query optimization to be done w.r.t SQL Server Express 2005 ?
We highly appreciate any help towards resolving the above problem.
Regards,
Sasi
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Sep 26, 2006
HI, all
I need to write a program, which using VM 1.1.8.
So I need to find the JDBC driver version 1.22, Can anyone help me???
Please Reply, a link for download jdbc 1.22 or any other solutions .
Thank you!
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Mar 21, 2008
Hi
I am using JDK 1.6 . I have downoladed the JDBC driver from
http://www.microsoft.com/downloads/details.aspx?familyid=07287B11-0502-461A-B138-2AA54BFDC03A&displaylang=en
This page mentions certain versions of JDK that this driver works with, but 1.6 is not one of them.
How can I use this driver with JDK 1.6?
Thanks
J.
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Jul 6, 2006
Hi this is my first post
I really needs some help
I have been stressing with issue for last few days.
I have a stored Procedure ramApplicationAddTest, I can run it through SQL Query Analyser without any problem.
I can call this using JDBC and it works, here is how I make call I make to SP
var con1 = DBDriver.getConnection ("alias:ProclaimConnect");
var stmt = con1.prepareCall( "{call ramApplicationAddTest(?,?,?,?,?)}");
stmt.setString(1,'BuildApp');
stmt.setString(2,'BASwimPool');
stmt.setString(3,'Test Test....');
stmt.setString(4,'');
stmt.setFloat(5,0);
stmt.execute();
stmt.close();
con1.close();
I also have another SQL 2000 Stored Procedure called
RamApplicationAddTest1, I can run this SP also through SQL Query Analyser without any problem.
But when I try to run this using JDBC it, gives me following Exception.
SQLState[ERR-Unexpected]ErrorCode[0]Message[java.lang.NullPointerException
at com.hs.form.jdbc.JDBCErrorhandler.isMssqlConnectio nErrorInTx(JDBCErrorHanlder.
An exception 'DatabaseQueryException' has occurred at DatabaseQueryClientWinInetImpl.cpp (291).
var con2 = DBDriver.getConnection ("alias:ProclaimConnect");
var stmt = con2.prepareCall( "{call ramApplicationAddTest1(?,?,?)}");
stmt.setString(1,’BuildApp’);
stmt.setString(2,’BASwimPool’);
stmt.setString(3,’Test’);
stmt.execute();
stmt.close();
con2.close();
I hope somebody can give me some hints to fix this.
Amar
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May 13, 2004
I have SQL server installed on a XP box. I need to access it from other machines using Java code. Where can I download a JDBC driver?
Thanks.
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Dec 13, 2005
Here is an obscure question that I am sure can be dealt with from a10,000 ft view:I have installed Fuego (an enterprise level BPM). Another applicationwas built in-house to connect to Fuego (Fuego has two SQL 2000databases to handle the business process flow and instance flow). Thisin-house application then uses Tomcat & JDBC to connect to the abovementioned Fuego databases and a third SQL 2000 database that handlesthe actual data.The entire gist is this: The application(s) run the SQL calls as astandardIt is SQL Server performing all of the cursor work; I'm guessingthrough whatever translation layer. Maybe JDBC is causing this? Hasanyone seen this before?My second problem is that I let the application run for 1 day in useracceptance testing and I ended up with 1.8GB procedure cache (allcursors) at 50% cache hit ratio and 140MB of data cache at 99% cachehit ratio. What could be the cause?Thanks,Josh
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Jun 18, 2007
Hello,
I am developing an application which needs JDBC connection to a Named Instance of SQL Server 2000 (other than default instance). I am facing problem in this regard as my code gives an exception "Time Out" or "Connection Failed". However it works fine with the default named instance...The main driver class is "com.microsoft.sqlserver.jdbc.SQLServerDriver"
and Connection URL is
"jdbc: sqlserver://localhost;instanceName=Testing:1432;databaseName=testDB;"
It gives the exception that Unable to connect to named instance....
Please if any one have any knowledge in this regard....do let me know....I have read an article on MSDN according to which on MS SQL Server 2000 the named Instance other than default can be accessed only through named pipes.
http://msdn2.microsoft.com/en-us/library/aa224779(sql.80).aspx
if some body can tell me Connection string for JDBC driver which utilizes named pipes...the it will be very help full for me.........any help from MSDN Experts is really appreciated...
Thanks
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Apr 5, 2004
Hi,
Recently, I found a bug in Microsoft's official SQL Server2000 JDBC driver.
It seemed to lie in the Statement's setDate() method. Maybe they simply assumed
all date are represented in 12-hours format.
The test code is below:
public void testMisc() throws Exception {
Connection conn = TransactionManager.getConnection();
String sql = "select count(salescheck0_.ID) as x0_0_ " +
"from T_CHK_OUT_BILL_TEST salescheck0_ " +
"where (salescheck0_.EX_TIME>?)" +
"and(salescheck0_.EX_TIME<?)";
PreparedStatement stmt = conn.prepareCall(sql);
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date timefrom = sdf.parse("2004-04-02 00:00:00.000");
Date timeto = sdf.parse("2004-04-02 23:00:00.000");
stmt.setDate(1, new java.sql.Date(timefrom.getTime()));
stmt.setDate(2, new java.sql.Date(timeto.getTime()));
// stmt.setString(1, "2004-04-02 00:00:00.000" );
// stmt.setString(2, "2004-04-02 23:59:59.000" );
ResultSet rs = stmt.executeQuery();
if(rs.next()) {
int count = rs.getInt(1);
System.out.println("count = " + count);
}
}
The test data is following:
ID, SO_ID,WH_ID,CLIENT_ID,CODE,OPERATOR,CHK_OUT_TIME, STATUS,CREATE_TIME,DELIVER_TYPE
86179,67521,1,661,SLCCK200404020016,xuwei,2004-4-2 12:15,20,2004-4-2 9:40,10
86229,67566,1,118,SLCCK200404020066,xuwei,2004-4-2 12:23,20,2004-4-2 9:41,10
86231,67568,1,130,SLCCK200404020068,xuwei,2004-4-2 12:23,20,2004-4-2 9:41,10
86232,67569,1,134,SLCCK200404020069,xuyili,2004-4-2 11:08,20,2004-4-2 9:41,10
86233,67571,1,151,SLCCK200404020070,xuwei,2004-4-2 12:23,20,2004-4-2 9:41,10
86234,67572,1,55,SLCCK200404020071,xuwei,2004-4-2 12:23,20,2004-4-2 9:41,10
86235,67573,1,71,SLCCK200404020072,xuwei,2004-4-2 12:23,20,2004-4-2 9:41,10
86252,67590,1,298,SLCCK200404020089,xuwei,2004-4-2 12:33,20,2004-4-2 9:41,10
86268,67576,1,25,SLCCK200404020105,xuwei,2004-4-2 12:23,20,2004-4-2 10:18,10
86269,67588,1,271,SLCCK200404020106,xuwei,2004-4-2 12:33,20,2004-4-2 10:20,10
86270,67506,1,42,SLCCK200404020107,xuwei,2004-4-2 12:15,20,2004-4-2 10:21,10
86271,67531,1,751,SLCCK200404020108,xuyili,2004-4-2 11:28,20,2004-4-2 10:22,10
86272,67570,1,149,SLCCK200404020109,xuwei,2004-4-2 12:23,20,2004-4-2 10:29,10
86273,67600,1,6,SLCCK200404020110,xuwei,2004-4-2 12:15,20,2004-4-2 10:40,10
86373,67665,3,686,SLCCK200404020210,root,2004-4-2 17:18,20,2004-4-2 16:32,10
86374,67657,3,883,SLCCK200404020211,root,2004-4-2 17:18,20,2004-4-2 16:32,10
86375,67666,3,686,SLCCK200404020212,root,2004-4-2 17:18,20,2004-4-2 16:32,10
86376,54799,1,395,SLCCK200404020213,zhouliyi,2004-4-2 19:52,20,2004-4-2 19:51,10
86377,55383,1,341,SLCCK200404020214,zhoulingyi,200 4-4-2 19:52,20,2004-4-2 19:51,10
Given the code and data, the expected output ought to be "count = 19"
But it's "count = 19" instead.
However, if you set date by using alternative method like the commented statements,
you can get the correct result.
Does anybody know if there exists any patch?
Could we expect Mircosoft to fix this bug? If so, where could I submit this bug report?
Regards,
Justin
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Jul 20, 2005
Hi,I have installed MQ SQL Server 2000 on my laptop and trying to useSPRINTA 2000 JDBC Driver (inetmssql.jar) to connect to the local db. Iwrote a sample Java app to test the connection and I get the followingerror trace,DriverManager.initialize: jdbc.drivers = nullJDBC DriverManager initializedSQLException: SQLState(08S01){sql7=true, port=1433, user=sa, url=jdbc:inetdae7:US0211737-WP01:1433,password=wasfe, host=US0211737-WP01}getConnection failed: com.inet.tds.SQLException: Connection refused:connectcom.inet.tds.SQLException: Connection refused: connectjava.net.ConnectException: Connection refused: connectat java.net.PlainSocketImpl.socketConnect(Native Method)at java.net.PlainSocketImpl.doConnect(Unknown Source)at java.net.PlainSocketImpl.connectToAddress(Unknown Source)at java.net.PlainSocketImpl.connect(Unknown Source)at java.net.Socket.connect(Unknown Source)at java.net.Socket.connect(Unknown Source)at java.net.Socket.<init>(Unknown Source)at java.net.Socket.<init>(Unknown Source)at com.inet.tds.TdsDriver.a(Unknown Source)at com.inet.tds.TdsDriver.run(Unknown Source)at java.lang.Thread.run(Unknown Source)I tried searching the web and product doc. Nothing seems to help me.Has anyone come across similiar problems? Any pointers will beappreciated also.Thanks,Swami.
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Sep 3, 2007
Hi,
We are running one shopping site for our organisation, which includes Tomcat 5.0.28 , IIS & SQL Server 2000 SP3 hosted on platform Microsoft Windows Server 2003 Enterprise Ed. , we are running jsp pages server side and site is hosted on internet,
but it is observed that after every 1/2 days , page will throw following exception, and site get blocked.
javax.servlet.ServletException: Network error IOException: No buffer space available (maximum connections reached?) : connect
Can anybody help please?
I am beginner with JDBC - SQL Server Connectivity ,
I am giving our configuration details:
Driver Used - Microsoft SQL Server Driver 2000 SP3
Protocol Used - TCP/IP which open socket connection on default port 1433
Authentication - Mix Mode Authetication ( using sa account login)
Even setting done within LOCAL instance running on server to allow max. connections i.e 32767
My observation is that some kind of virus threat may causing this error, because if server will be rebooted, we doesn't
get any error and everything works fine.
Waiting for your suggestions and advise.
Thanks a lot.
Regards,
Mandar Velankar
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Jul 20, 2005
Hi;I went to the microsoft site to try to find a guide to the errormessages that the jdbc drivers give ( for sqlserver 2000 ).I had no luck.Does anyone know if there is such a guide?I got this mysterious error message below in my logs ( nothing visiblein user land ).Anyone know what it means?Thanks in advanceStevejava.sql.SQLException: [Microsoft][SQLServer 2000 Driver forJDBC][SQLServer]Transaction (Process ID 151) was deadlocked on lockresources with another process and has been chosen as the deadlockvictim. Rerun the transaction.
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Jul 20, 2005
Please help!!!We had a sql server 7 DB, with a char 8 field, in which some of thedata was only 7 characters in length.Via a type 4 JDBC driver, we got back a NON space padded String.This server got upgraded to sql server 2000. Now, via the type 4 JDBCdriver, we get a String padded field!!I understand there is a ODBC setting for ANSI padding on/off, but thetype 4 doesn;t use the OdBC-JDBC bridge...so configuration could beaffecting the data coming back?No one here can work out why. Any ideas?
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May 6, 2008
Hello,I am working with the driver JDBC and I have a strange error that I can't find in Google for example.Caused by: com.seeburger.smarti.util.SmartiEJBException: nested exception is: com.seeburger.smarti.dao.DAOSysException: java.sql.SQLException: [Microsoft][SQLServer 2000 Driver for JDBC][SQLServer]Must declare the variable '@P2GROUP'.I don't know what is this variable '@P2GROUP'.Does anybody know it ?Thanks
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Sep 6, 2007
I have a problem where my connection always has an open transaction as viewed by activity monitor.
I am using the latest MS SQL Server 2005 JDBC driver (1.1) and connecting to SQL Server 2000.
This issue arises only when selectMethod=cursor and autoCommit is set to false. This issue does not exist when I connect to SQL Server 2005.
Has anyone else seen this issue?
How can this issue be resolved?
Thanks
Peter
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Apr 14, 2008
I have read similar posts to this, but I am still having problems.
I am trying to use connection pooling to connect to a local SQL Server 2005 database. I am running my application using
MyEclipse Enterprise Workbench. I have verified that sqljdbc.jar resides in "WebRoot/WEB-INF/lib/"
"WebRoot/WEB-INF/web.xml":
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsichemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<resource-ref>
<res-ref-name>jdbc/DefaultDS</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
</web-app>
"WebRoot/META-INFcontext.xml":
<?xml version="1.0" encoding="UTF-8"?>
<Context>
<Resource name="jdbc/DefaultDS"
auth="Container"
type="javax.sql.DataSource"
username="tec"
password="tec"
driverClassName="com.microsoft.sqlserver.jdbc.SQLServerDrive"
url="jdbcqlserver://localhost:1433/tec;databaseName=tec;user=tec;password=test;"
validationQuery="select 1"
maxActive="10"
maxIdle="2"/>
</Context>
Classpath:
<?xml version="1.0" encoding="UTF-8"?>
<classpath>
<classpathentry kind="src" path="src"/>
<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
<classpathentry kind="con" path="com.genuitec.eclipse.j2eedt.core.J2EE14_CONTAINER"/>
<classpathentry kind="lib" path="WebRoot/WEB-INF/lib/dom.jar"/>
<classpathentry kind="lib" path="WebRoot/WEB-INF/lib/jaxen-full.jar"/>
<classpathentry kind="lib" path="WebRoot/WEB-INF/lib/jaxp-api.jar"/>
<classpathentry kind="lib" path="WebRoot/WEB-INF/lib/jdbc2_0-stdext.jar"/>
<classpathentry kind="lib" path="WebRoot/WEB-INF/lib/sqljdbc.jar"/>
<classpathentry kind="lib" path="WebRoot/WEB-INF/lib/jstl.jar"/>
<classpathentry kind="lib" path="WebRoot/WEB-INF/lib/mail.jar"/>
<classpathentry kind="lib" path="WebRoot/WEB-INF/lib/sax.jar"/>
<classpathentry kind="lib" path="WebRoot/WEB-INF/lib/saxpath.jar"/>
<classpathentry kind="lib" path="WebRoot/WEB-INF/lib/standard.jar"/>
<classpathentry kind="lib" path="WebRoot/WEB-INF/lib/xalan.jar"/>
<classpathentry kind="lib" path="WebRoot/WEB-INF/lib/xercesImpl.jar"/>
<classpathentry kind="output" path="WebRoot/WEB-INF/classes"/>
</classpath>
Code to connect:
import java.io.Serializable;
import java.sql.*;
import javax.sql.*;
import javax.naming.*;
public int testConnect(){
Connection conn = null;
InitialContext ctx = null;
java.sql.Statement stmt = null;
try {
ctx = new InitialContext();
Context envCtx = (Context) ctx.lookup("java:comp/env");
DataSource ds = (DataSource) envCtx.lookup("jdbc/DefaultDS");/*This is generating the Cannot load JDBC driver class... error*/
conn = ds.getConnection();
stmt = conn.createStatement();
return CONSTANT.SUCCESS;
} catch (Exception e) {
return CONSTANT.FAILURE;
}finally {
try {
if (stmt != null)
stmt.close();
if (conn != null)
conn.close();
if (ctx != null)
ctx.close();
} catch (Exception ex) {
// do nothing
return CONSTANT.FAILURE;
}
}
}
Any ideas would be greatly appreciated.
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Jul 23, 2005
Hi,Simple question: A customer has an application using Access 2000frontend and SQL Server 2000 backend. Data connection is over ODBC.There are almost 250 concurrent users and is growing. Have theysqueezed everything out of Access? Should the move to a VB.Net frontendtaken place ages ago?CheersMike
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