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- #Informix odbc disable caching how to
- #Informix odbc disable caching update
- #Informix odbc disable caching driver
Enable this attribute if you want cursors to be held at the current position when the transaction ends. Preserve cursors at the end of each transaction - Determines whether cursors will be preserved or closed at the end of each transaction. Performance risks From Pace University for connecting to Informix for administering ColdFusion Server: If set to set to 0 (Disabled), cursors are closed at the end of transactions. This value may slow the performance of your database operations.
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If set to 1 (Enabled), cursors are held at their current position when transactions end. Performance risks From DataDirect for ODBC:ĭetermines whether cursors will be preserved or closed at the end of transactions. MoveLast/.MoveFirst to populate the recordset.įlag for cursor behavior when a commit or rollback transaction is called I believe the performance loss with Preserve is minimal compared to the potential performance hit on a large recordset with code that performs a. what are the pitfalls of using "Preserve" for Cursor Behavior in Informix ODBC DSN?īased on the research below, I feel confident that I can recommend to change the Cursor Behavior to Preserve, though at a potential performance hit.
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The only documentation I could find for Cursor Behavior doesn't explain the values:
#Informix odbc disable caching driver
My limited understanding is that if I leave it on "0 - close", this tells the driver to decide when to close the recordset instead of letting the program decide. On the other hand, I can forego the code changes and instead change the DSN Cursor Behavior to "1 - Preserve" and the MoveNext does not throw an error.
#Informix odbc disable caching update
This change will require me to update potentially 400 programs. I added code to perform a MoveLast/MoveFirst on the Recordset before the loop and the MoveNext does not throw an error. With the same code, the program throws an error on MoveNext. The program code, would open a Recordset from the DSN, loop through each record and save each record to a local AccessDB (execute INSERT INTO), and then perform a MoveNext on the Recordset.įor IDS, we use the onsoctcp protocol. The programs I have use ODBC System DSNs to communicate with the database.įor SE, we use the sesoctcp protocol. Sanitysql => select count(*) from systables Įven the debugging stops when the freeze happens, without any meaningful message explaining what happened.I am converting an Informix SE to an IDS database. The section is as follows:Įnabled => yes (this is where I disable it by putting “no” and restarting Asterisk) The fix is always to disable the DSN in the res_nf file and then issue a “service asterisk restart”. You type commands in the console but they don’t seem to respond. When the database goes down, Asterisk just can’t keep going. When all is working well, everything is perfect. The caller inputs an associate ID and Asterisk get his name and other info via this query. I’m running an Asterisk 1.8.7.0 box that does some regular ODBC queries to an Informix database.
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#Informix odbc disable caching how to
I’ve been experiencing this for almost two years without ever understanding what is really going on or how to fix it.