ALI Database Connection Configuration and Monitoring

Is there some way -- documented or not -- to set the number of connections that ALI uses between it and the SQL Server or Oracle instance behind it? If so, what's the default setting (and how do you override it)?
Also, can we somehow monitor the number of active connections that ALI has to the database?
Thanks!
Chris Bucchere | bdg | [email protected] | http://www.thebdgway.com

Chris,
I thought a lot of this was covered in a previous post -
[url http://forums.bea.com/bea/message.jspa?messageID=400007669&tstart=0]http://forums.bea.com/bea/message.jspa?messageID=400007669&tstart=0
The maximum # of DB connections can be set in a config file. The portal itself control the actual number of connections between the min & max in its OpenDB connection pooling logic. I believe the default max # of connections is 40 connections.
I believe the "Counter Monitoring System" - described in the G6 Administration Guide - provide a means to monitor the number of DB connections although I believe the same info could be obtained through other means at the OS-level.
John
Is there some way -- documented or not -- to set the
number of connections that ALI uses between it and
the SQL Server or Oracle instance behind it? If so,
what's the default setting (and how do you override
it)?
Also, can we somehow monitor the number of active
connections that ALI has to the database?
Thanks!
Chris Bucchere | bdg | [email protected] |
http://www.thebdgway.com

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Hello,
I am working on PO 7.4. I want to test a payload from "Configuration and Monitoring Home". However, in the "Testing" tab, the option to test the payload is not available. Is this option not available in PO 7.4? Only cache connectivity test exists. I have attached a screenshot for reference.
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Hi all,
As one can expect from early adopter release there could be some bugs but I can't find any references in forum to my situation:
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Hi,
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Yes, TopLink allows you to use the app server's connection pooling and transaction services. Chapter 2 of the Oracle9iAS TopLink Foundation Library Guide provides details as do the TopLink examples. The easiest way to set this up is by using the sessions.xml file. The sample XML below is from the file <toplink903>\examples\ias\examples\ejb\sessionbean\sessions.xml. Here we are adding the datasource defined in OC4J and specifying that we are using the OC4J transaction controller also.
<login>
<user-name>sa</user-name>
<password></password>
<datasource>java:comp/env/jdbc/ejbJTSDataSource</datasource>
<uses-external-transaction-controller>true</uses-external-transaction-controller>
<uses-external-connection-pool>true</uses-external-connection-pool>
</login>
<external-transaction-controller-class>oracle.toplink.jts.oracle9i.Oracle9iJTSExternalTransactionController</external-transaction-controller-class>
When using this approach you need to change your TopLink code slightly in the EJB methods:
a. Acquire the ACTIVE unit of work from the server
session (again, see the EmployeeSessionEJB code
example) with something like:
UnitOfWork uow = clientSession.getActiveUnitOfWork();
b. Calls to uow.commit() can be ommitted or commented out
because the EJB will handle this. Note that of course
the methods you create in the EJB that are using this
approach must have TX Required (default).
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Pete

Labview Database Connection Toolkit and decimal point

Hi,
on my system I use "," (comma) as decimal point.
In Labview Options I unflagged "Use localized decimal point", and numeric controls and indicators use "." (dot) as decimal point.
The problem is that Labview Database Connection Toolkit keeps returning floating point numbers as strings with comma as decimal point.
Has anyone experienced this issue?
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Thanks in advance for any help,
Marco

You have two or three places to look. First there is the DCT. Second, there's a couple layers there that could cause problems (the mySQL drivers and ADO) and then there's even the posibility that the issue could be in the DBMS itself.
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Mike...
Certified Professional Instructor
Certified LabVIEW Architect
LabVIEW Champion
"... after all, He's not a tame lion..."
Be thinking ahead and mark your dance card for NI Week 2015 now: TS 6139 - Object Oriented First Steps

Parallel database connections and single query between databases

Hi, I am looking to execute this SQL query between 2 different databases to update a local database based on data selected from a remote one.
e.g.:
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- local database schema: dbo
- local database table1
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- remote database schema: dbo
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How do I go about this?
Thanks,
Mohamed

Mohamed,
There is a VI in the Database Connectivity Toolkit that allows you to execute SQL queries: DB Tools Execute Query.
http://zone.ni.com/reference/en-XX/help/370016E-01/lvdatabase/db_tools_execute_query/
Is this what you are looking for?
Drew T.
NIC AE Specialist

Database connectivity toolset and microsoft access

Bonjour,
je suis débutante labview et j'aurais besoin d'aide...
voici mon pb:
j'ai créé une table sous microsoft access et j'aimerais lire les données à partir de labview en utilisant "database connectivity toolset". les vi utilisés sontpen connection, select data et close connection.
le vi "open connection" demande le 'connection information': j'ai donc donné le chemin ou se trouve mon fichier .udl
ce fichier udl est configuré comme cela:
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mais ca ne marche pas! j'ai une erreur apres le vi select data, qui me dit 'erreur syntax'
je ne sais pas si j'utilise les bons vi....
merci pour une réponse rapide.

Bonjour,
Tout d'abord, vous devez vérifiez si la création du fichier UDL est correcte. Ci-dessous une note d'application décrivant étape par étape cette procédure:
* Creating a Microsoft Data Link file (.UDL) for Connecting to Microsoft Access in LabVIEW
http://digital.ni.com/public.nsf/websearch/1D5EB4DCBD13106486256B9D005E11B0?OpenDocument
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Si la connection échoue, l'exemple doit renvoyer une erreur avec un code et un descriptif. Ces informations sont indispensables pour débuter un débuggage (l
es codes d'erreurs classiques sont référencés sur le web et des notes d'applications sont fournies pour les corriger).
Cordialement.
Matthieu Gourssies
National Instruments France.

Database connectivity toolset and nested transaction

Is it possible to make nested transactions with the Database Connectivity Toolset ?
By nested transactions I mean that I want to open a transaction inside a transaction.
I use LabVIEW 6.1 and Database Connectivity Toolset 1.1
Any ideas are welcome.

You may be able to do this in a different manner. Your options depend on how the database has structured the data. For example you can have a table defining "measures", another table defining "measure setps" and so on.
Each measure has an ID (MID) and each measure step has an ID (MSID) and these can be related to each other to provide the hierarchy. So in this case you could just get a measure, then query for all the measure steps that match (the MID and MSID) and sort them based on some attribute/criteria and work down in that manner.
This would provide a clean data architecture and enable you to reuse steps in multiple measures if you needed to. I'm not sure how your database is building the hierarchy, in the end there are some parent ch
ild relationships defined ... these would be very similar to the IDs referred to above.
Like you said, had to explain without a picture.
Regards,
Kamran

Database connection timeouts and datasource errors

Connections in the pool randomly die overnight. Stack traces show that for some reason, the evermind driver is being used even though the MySql connection pool is specified.
Also, the evermind connection pool is saying connections aren't being closed, and the stack trace shows they're being allocated by entity beans that are definitely not left hanging around.
Sometimes we get non-serializable errors when trying to retrieve the datasource (this is only after the other errors start). Some connections returned from the pool are still good, so the application limps along.
EJBs and DAOs both use jdbc/SQLServerDSCore.
Has anyone seen this problem?
<data-sources>
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          xa-location="jdbc/xa/SQLServerXACore"
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          username="xxx"
          password="xxx"
          staleness-timeout="3600"
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Rick,
OC4J 9.0.4.0.0 - BTW, do you know of any patches?As far as I know, there are no patches for the 9.0.4
production version of OC4J stand-alone.
I'm using container managed persistence,It was not clear to me, from your previous post, that you
are using CMP entity beans.
I found staleness-timeout and alive-poll-query
somewhere on a website when trying to track this
down. Here's four sources:Those sources refer to OrionServer -- and an older version, too, it seems.
Like all other Oracle products that start out as somebody
else's -- including, for example, JBuilder (that became "JDeveloper"), Apache Web Server (that became "Oracle HTTP Server") and TopLink -- their development paths diverge, until, eventually, there is absolutely no similarity between them at all. Hence, the latest versions of OC4J and "OrionServer" are so different, that you cannot be sure that something that works for "OrionServer" will work for OC4J.
I recall reading something, somewhere, sometime about configuring OC4J to use different databases (other than Oracle), but I really don't remember any details (since it was not relevant to me, because we only use Oracle database). In any case, it is possible to use a non-Oracle database with OC4J.
Good Luck,
Avi.

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As ColdFusion datasource we are using the Oracle thin client to connect with the database. So, basically we are using a JDBC URL such as jdbc:oracle:thin:@... and as Driver Class oracle.jdbc.OracleDriver. This works successfully however we would like to set encryption and integrity parameters as well. In Java this is done similarly by setting a Properties object prior to getting a connection as follows:
Properties prop = new Properties();
prop.put("oracle.net.encryption_client", "REQUIRED");
prop.put("oracle.net.encryption_types_client", "( DES40 )");
prop.put("oracle.net.crypto_checksum_client", "REQUESTED");
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ods.setProperties(prop);
ods.setURL("jdbc:oracle:thin:@localhost:1521:main");
Connection conn = ods.getConnection();
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I also know that in application servers such as Oracle AS there is an option when creating a datasource which says "Add Properties". In there you can add such properties. So, I was thinking of maybe creating a JNDI DS in the app. server and then magically connecting to it but this may have some impacts on the app.
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I would love to have your professional opinion and suggestions on this.

I believe the thin driver actually needs the IP address (not the DNS name). Also, is "java" the name of the Oracle instance to which you are trying to connect?
Try the following:String driver = "jdbc:oracle:thin";
String dbIP = "W2RZ1NXG01's IP address";
String dbPort = "1530";
String dbSid = "java";
String dbUser = "Admin";
String dbPswd = "apassword";
String cnctStr = driver + ":@" + dbIP + ":" + port + ":" + dbSid;
try
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Memory leak when using database connectivity toolset and ODBC driver for MySQL

The "DB Tools Close Connection VI" does not free all the memory used when "DB Tools Open Connection VI" connects to "MySQL ODBC Driver 3.51".
I have made a small program that only opens and close the connection that I run continously and it's slowly eating all my memory. No error is given from any of the VI's. (I'm using the "Simple Error Handler VI" to check for errors.)
I've also tried different options in the DSN configuration without any results.
Attachments:
TestProgram.vi ‏16 KB
DSNconfig1.jpg ‏36 KB
DSNconfig2.jpg ‏49 KB

Also,
I've duplicated the OPs example: a simple VI that opens and closes a connection. I can say this definately causes a memory leak.
Watching the memory:
10:17AM - 19308K
10:19AM - 19432K
10:22AM - 19764K
10:58AM - 22124K
Regards,
Ken
Attachments:
OpenCloseConnection.vi ‏13 KB

SOA Composites in Parallel - How to Configure and Monitor

We have couple of SOA Composites that customers are making calls to. How can I configure these composites / Web Service that can be handled parallely.
Customer is calling each composite 10/20 times (because of the load) in every 10 seconds and based on their testing it is queuing up and performance is slow. But when I look at CUBE_INSTANCE table for start and end of composite instances, it is doing good.. with in 1 second.
I am guessing I need to configure to handle parallel calls to these SOA Composites.
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Hi,
It depends on what you have in that composite? For BPEL you should go through this...
http://docs.oracle.com/cd/E23943_01/core.1111/e10108/bpel.htm#BABGBFII
The master document is this...
http://docs.oracle.com/cd/E23943_01/core.1111/e10108/part_soa.htm#ASPER99595
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Vlad

Single database connection create and using all programs jsp and servlet

Hai
i am create databaset connection using that all programs how to implement

Post the steps you managed already. If you don't know anything about how to receive data from a database try this link:
http://java.sun.com/docs/books/tutorial/jdbc/index.html

Connecting TV and Monitors to your PC

Hi I have seen this question asked several times on this forum. Here is the best video that I have seen. It is made by HP support. I don't understand why these threads can't be made stickies. It sure would save advisiors a lot of time.
Dokie!!!
http://www8.hp.com/h20621/video-gallery/us/en/customer-care/category/
I Love my Satellite L775D-S7222 Laptop. Some days you're the windshield, Some days you're the bug. The Computer world is crazy. If you have answers to computer problems, pass them forward.

Hi !! I think this is a great video. The best I have ever seen. It would take a lot of time to create a tutorial that explains it this well. It will soon creep down the message list and eventually wind up in archives or page 5 where it will never be viewed again I'm probably wearing out my welcome here on the forum, but some stickies could save advisors a lot of time. I could name at least 10; and they have been created by staff already. Here's just one.
http://forums.toshiba.com/t5/Computer-Troubleshooting/What-can-I-do-if-my-Windows-7-or-Windows-Vista...
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I have done extensive programming with the SQL Toolkit with LabVIEW versions through 6.1. My customer now wants to upgrade to Windows 7, so I am trying to upgrade to LabVIEW 2009 (my latest purchased version) using the Database Connectivity Toolkit, and the SQL Toolkit Compatibility vis. Everything seemed to be going okay with the higher level SQL operations, but I ran into trouble with the Get Column Name.vi.
The pictures below show the problem. The original SQL Toolkit connected the Prepare SQL.vi with the Get Column Name.vi with a cluster of two references, one for connection, and one for sql. The new compatibility vis have a class conflict in the wire because the Prepare SQL.vi contains a cluster with connection, and command references, but the Get Column Name.vi expects a cluster with connection and recordset references.
How do I resolve this conflict?
Thank You.
Dan

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Try to take over the world!

Database connectivity toolkit problem with WINDOWS VISTA and Microsoft jet 4.0 provider

Hi again,
I'm experiencing a problem with Database connectivity toolkit and Microsoft Jet 4.0 provider (MS ACCESS mdb database).
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Does anyone have an idea whether it is a sort of compatibility issue or a different thing?
Would it be possible to include my DLLs into the installer in such a way LabVIEW application calls those DLLs instead of the ones it finds on the host PC?
Thanks a lot. Any suggestion or advice very welcome and appreciated.

I ran into this with Windows7 64 but, could not get the jet 4.0 to work. Endnd up dumping access and used sql server express, its free, and all my code worked fine, just used a different UDL to connect. I wasted lots of time trying to find a way of getting the jet4.0 to work with 64bit windows.
Paul Falkenstein
Coleman Technologies Inc.
CLA, CPI, AIA-Vision
Labview 4.0- 2013, RT, Vision, FPGA

ALI Database Connection Configuration and Monitoring

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