MS SQL Server 7 - Performance of Prepared Statements and Stored Procedures

Hello All,
Our team is currently tuning an application running on WL 5.1 SP 10 with a MS
SQL Server 7 DB that it accesses via the WebLogic jConnect drivers. The application
uses Prepared Statements for all types of database operations (selects, updates,
inserts, etc.) and we have noticed that a great deal of the DB host's resources
are consumed by the parsing of these statements. Our thought was to convert many
of these Prepared Statements to Stored Procedures with the idea that the parsing
overhead would be eliminated. In spite of all this, I have read that because
of the way that the jConnect drivers are implemented for MS SQL Server, Prepared
Statments are actually SLOWER than straight SQL because of the way that parameter
values are converted. Does this also apply to Stored Procedures??? If anyone
can give me an answer, it would be greatly appreciated.
Thanks in advance!

Joseph Weinstein <[email protected]> wrote:
>
>
Matt wrote:
Hello All,
Our team is currently tuning an application running on WL 5.1 SP 10with a MS
SQL Server 7 DB that it accesses via the WebLogic jConnect drivers.The application
uses Prepared Statements for all types of database operations (selects,updates,
inserts, etc.) and we have noticed that a great deal of the DB host'sresources
are consumed by the parsing of these statements. Our thought was toconvert many
of these Prepared Statements to Stored Procedures with the idea thatthe parsing
overhead would be eliminated. In spite of all this, I have read thatbecause
of the way that the jConnect drivers are implemented for MS SQL Server,Prepared
Statments are actually SLOWER than straight SQL because of the waythat parameter
values are converted. Does this also apply to Stored Procedures???If anyone
can give me an answer, it would be greatly appreciated.
Thanks in advance!Hi. Stored procedures may help, but you can also try MS's new free type-4
driver,
which does use DBMS optimizations to make PreparedStatements run faster.
Joe
Thanks Joe! I also wanted to know if setting the statement cache (assuming that
this feature is available in WL 5.1 SP 10) will give a boost for both Prepared Statements
and stored procs called via Callable Statements. Pretty much all of the Prepared
Statements that we are replacing are executed from entity bean transactions.
Thanks again

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I am new to java programming, can anybody explain
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Thank you
PalspaceWhat does you subject line have to do with your question?
The difference between a stored proc and a prepared statement is mainly this.
A stored proc is stored in the database server permanently and can be used and re-used from a different connections.
A PreparedStatement is not valid across connections.
Stored procs are almost always precompiled. (I am just hedging a bit here just in case but you can consider it 100%)
PreparedStatements MAY be precompiled. Hard to say.
Precompiling means at least one of and perhaps all of the following depending on the database
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Hi,
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Thanks in advance,
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Hi,
Facing a problem on WL6.0. We are connecting to MS SQL server 2000 using a stateless
session bean
using container managed transaction. The bean method does a few updates to the
database and also
calls a stored procedure that generates primary keys many times. This stored procedure
(SP) is running
in a transaction of its own since it has to increment a counter, update the database
and then return the
primary key.The primary key generator SP is working fine and does not lock the
database in many bean
methods.
In some methods we find that the primary key generator SP has locked the database.
We
then see a lock on the database created due to this SP in the MS SQL client. The
execution goes
into the SP and gets stuck there till the bean's transaction times out. The error
message given is
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on: Transaction timed out after 31seconds
tx = transaction=(IdHash=1746718,Name = [EJB StructMgrBeanImpl.addStructure()],X
id=10908:51e67e9d7185816a,Status=Active,numRepliesOwedMe=0,numRepliesOwedOthers=
0,seconds since begin=31,seconds left=30,activeThread=Thread[ExecuteThread: '7'
for queue: 'default',5,Thread Group for Queue: 'default'],ServerResourceInfo[web
logic.jdbc.jts.Connection]=(state=started,assigned=none),SCInfo[myserver]=(state
=active),properties=({weblogic.transaction.name=[EJB StructMgrBeanImpl.addStruct
ure()], weblogic.jdbc=t3://10.200.15.136:7001}))]). No further JDBC access is
al
lowed within this transaction.
What could be the potential problems in the method's code/SP that could be causing
the timeout?
Anyone faced similar problems?
Thanks in advance,
Sreeja

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callStmt.close();
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BEGIN
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FROM ID_MASTER idm, PERSON prs
WHERE USERNAME = username
AND USER_PASSWORD = userpassword
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END;
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Hello,
Below is query created by Jonathan Kehayias for measuring Perfom counters using DMV sys.dm_os_performance_counter.
You can download book from below link
https://www.simple-talk.com/books/sql-books/troubleshooting-sql-server-a-guide-for-the-accidental-dba/
DECLARE @CounterPrefix NVARCHAR(30)
SET @CounterPrefix = CASE WHEN @@SERVICENAME = 'MSSQLSERVER'
THEN 'SQLServer:'
ELSE 'MSSQL$' + @@SERVICENAME + ':'
END ;
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SELECT CAST(1 AS INT) AS collection_instance ,
[OBJECT_NAME] ,
counter_name ,
instance_name ,
cntr_value ,
cntr_type ,
CURRENT_TIMESTAMP AS collection_time
INTO #perf_counters_init
FROM sys.dm_os_performance_counters
WHERE ( OBJECT_NAME = @CounterPrefix + 'Access Methods'
AND counter_name = 'Full Scans/sec'
OR ( OBJECT_NAME = @CounterPrefix + 'Access Methods'
AND counter_name = 'Index Searches/sec'
OR ( OBJECT_NAME = @CounterPrefix + 'Buffer Manager'
AND counter_name = 'Lazy Writes/sec'
OR ( OBJECT_NAME = @CounterPrefix + 'Buffer Manager'
AND counter_name = 'Page life expectancy'
OR ( OBJECT_NAME = @CounterPrefix + 'General Statistics'
AND counter_name = 'Processes Blocked'
OR ( OBJECT_NAME = @CounterPrefix + 'General Statistics'
AND counter_name = 'User Connections'
OR ( OBJECT_NAME = @CounterPrefix + 'Locks'
AND counter_name = 'Lock Waits/sec'
OR ( OBJECT_NAME = @CounterPrefix + 'Locks'
AND counter_name = 'Lock Wait Time (ms)'
OR ( OBJECT_NAME = @CounterPrefix + 'SQL Statistics'
AND counter_name = 'SQL Re-Compilations/sec'
OR ( OBJECT_NAME = @CounterPrefix + 'Memory Manager'
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OR ( OBJECT_NAME = @CounterPrefix + 'SQL Statistics'
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WAITFOR DELAY '00:00:01'
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SELECT CAST(2 AS INT) AS collection_instance ,
OBJECT_NAME ,
counter_name ,
instance_name ,
cntr_value ,
cntr_type ,
CURRENT_TIMESTAMP AS collection_time
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FROM sys.dm_os_performance_counters
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OR ( OBJECT_NAME = @CounterPrefix + 'Buffer Manager'
AND counter_name = 'Lazy Writes/sec'
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AND counter_name = 'Processes Blocked'
OR ( OBJECT_NAME = @CounterPrefix + 'General Statistics'
AND counter_name = 'User Connections'
OR ( OBJECT_NAME = @CounterPrefix + 'Locks'
AND counter_name = 'Lock Waits/sec'
OR ( OBJECT_NAME = @CounterPrefix + 'Locks'
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OR ( OBJECT_NAME = @CounterPrefix + 'SQL Statistics'
AND counter_name = 'SQL Re-Compilations/sec'
OR ( OBJECT_NAME = @CounterPrefix + 'Memory Manager'
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AND counter_name = 'Batch Requests/sec'
OR ( OBJECT_NAME = @CounterPrefix + 'SQL Statistics'
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i.counter_name ,
i.instance_name ,
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THEN s.cntr_value - i.cntr_value
WHEN i.cntr_type = 65792 THEN s.cntr_value
END AS cntr_value
FROM #perf_counters_init AS i
JOIN #perf_counters_second AS s
ON i.collection_instance + 1 = s.collection_instance
AND i.OBJECT_NAME = s.OBJECT_NAME
AND i.counter_name = s.counter_name
AND i.instance_name = s.instance_name
ORDER BY OBJECT_NAME
-- Cleanup tables
DROP TABLE #perf_counters_init
DROP TABLE #perf_counters_second
Please mark this reply as the answer or vote as helpful, as appropriate, to make it useful for other readers

Statement,Prepared Statement and callable statement

Hi,
Please let me know in which scenario we are using Statement,Prepared Statement and callable statement.
and which is efficient one among the above.
Thanks in advance

Welcome to the forum!
>
Please let me know in which scenario we are using Statement,Prepared Statement and callable statement.
>
We don't know what scenario you are using those in or if you are using them at all. Are you asking what they are?
For document related questions you should consult the documentation or use your favorite search engine to get information.
See the Java Tutorial
http://docs.oracle.com/javase/tutorial/jdbc/basics/prepared.html
>
The main feature of a PreparedStatement object is that, unlike a Statement object, it is given a SQL statement when it is created. The advantage to this is that in most cases, this SQL statement is sent to the DBMS right away, where it is compiled. As a result, the PreparedStatement object contains not just a SQL statement, but a SQL statement that has been precompiled. This means that when the PreparedStatement is executed, the DBMS can just run the PreparedStatement SQL statement without having to compile it first.
>
The Javadocs for your Java SDK have the API for each of those classes and a description of what they are. And the Oracle JDBC Developer Guide has extensive information on how to use them.
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aa

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resultset.

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sree
"hogan" <[email protected]> wrote in message
news:3bd9cf88$[email protected]..
>
Is their any mechanism in Weblogic by which we can pool preparedstatements and
resultset.

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http://technet.microsoft.com/en-us/library/jj656654.aspx#BKMK_RBF_OperationsDatabase
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Thanks,
Ankit
Thanks, <b>Ankit Shah</b> <hr> Inkey Solutions, India. <hr> Microsoft Certified Business Management Solutions Professionals <hr> http://ankit.inkeysolutions.com

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