HP OpenVMS System Manager's Manual, Volume 2:...

Managing the LATACP Database Size

Understanding Transaction Logs

On OpenVMS Alpha systems, unpredictable results can occur if DECdtm services are used in a multithreaded environment. Do not make calls to DECdtm services in kernel threads other than the initial thread because much of the work performed by DECdtm uses the context of the calling process.

Task	Section
Planning transaction logs	Planning Transaction Logs
Planning for a DECnet-Plus network	Planning for a DECnet-Plus Network
Creating transaction logs	Creating Transaction Logs
Monitoring transaction performance	Monitoring Transaction Performance
Checking whether a transaction log is too small	Checking Whether a Transaction Log Is Too Small
Changing the size of a transaction log	Changing the Size of a Transaction Log
Moving a transaction log	Moving a Transaction Log
Dismounting a disk	Dismounting a Disk
Adding a node	Adding a Node
Removing a node	Removing a Node
Disabling DECdtm services	Disabling DECdtm Services
Enabling DECdtm services	Enabling DECdtm Services
Using the XA Gateway (Alpha only)	Using the XA Gateway (Alpha Only)

The map in Managing DECdtm Services shows the tasks, and the order in which to do them.

This chapter explains the following concepts:

Concept	Section
Understanding transaction logs	Understanding Transaction Logs
Understanding transaction groups	Understanding Transaction Groups

Figure 1  Managing DECdtm Services

Understanding Transaction Logs
Planning Transaction Logs
Planning for a DECnet-Plus Network
Creating Transaction Logs
Monitoring Transaction Performance
Checking Whether a Transaction Log Is Too Small
Changing the Size of a Transaction Log
Moving a Transaction Log
Dismounting a Disk
Adding a Node
Removing a Node
Disabling DECdtm Services
Enabling DECdtm Services
Using the XA Gateway (Alpha Only)

Managing the LATACP Database Size

Understanding Transaction Logs