Specifying Global Transaction Parameters in the RESOURCES Section


	BEA Home \| Events \| Solutions \| Partners \| Products \| Services \| Download \| Developer Center \| WebSUPPORT
	http://www.oracle.com/technology/documentation/index.html \| Site Map \| Search \| PDF Files \| Contact \| Glossary

Tuxedo Documentation \| Setting Up a BEA Tuxedo Application \| Local Topics \| Previous Topic \| Next Topic \| Contents

The following table describes the transaction-related parameters in the RESOURCES section.

Set This Parameter . . .	To . . .
MAXGTT	Limit the total number of global transaction identifiers (GTRIDs) allowed on one machine at one time. The maximum value allowed is 2048; the minimum, 0; and the default, 100. You can override the value of MAXGTT on a per-machine basis in the MACHINES section. Entries remain in the table only while a global transaction is active, so this parameter has the effect of setting a limit on the number of simultaneous transactions.
CMTRET	Indicate the initial setting of the TP_COMMIT_CONTROL characteristic as one of the following: LOGGED—the TP_COMMIT_CONTROL characteristic is set to TP_CMT_LOGGED, which means that tpcommit() returns when all the participants have successfully pre-committed. COMPLETE—the TP_COMMIT_CONTROL characteristic is set to TP_CMT_COMPLETE, which means that tpcommit() does not return until all the participants have successfully committed. The default is COMPLETE. To determine the appropriate setting, consult your resource manager (RM) vendors. If any RM in the application uses the late commit implementation of the XA standard, the setting should be COMPLETE. If all RMs use the early commit implementation, the setting should be LOGGED for performance reasons. (You can override this setting with tpscmt().)

Set This Parameter . . .

To . . .

MAXGTT

Limit the total number of global transaction identifiers (GTRIDs) allowed on one machine at one time. The maximum value allowed is 2048; the minimum, 0; and the default, 100. You can override the value of MAXGTT on a per-machine basis in the MACHINES section.

Entries remain in the table only while a global transaction is active, so this parameter has the effect of setting a limit on the number of simultaneous transactions.

CMTRET

Indicate the initial setting of the TP_COMMIT_CONTROL characteristic as one of the following:

LOGGED—the TP_COMMIT_CONTROL characteristic is set to TP_CMT_LOGGED, which means that tpcommit() returns when all the participants have successfully pre-committed.
COMPLETE—the TP_COMMIT_CONTROL characteristic is set to TP_CMT_COMPLETE, which means that tpcommit() does not return until all the participants have successfully committed.

The default is COMPLETE.

To determine the appropriate setting, consult your resource manager (RM) vendors. If any RM in the application uses the late commit implementation of the XA standard, the setting should be COMPLETE. If all RMs use the early commit implementation, the setting should be LOGGED for performance reasons. (You can override this setting with tpscmt().)