You can use the onlog and onstat utilities
to monitor transactions.
Using the onlog utility to monitor transactions
The onlog utility displays all or selected portions
of the logical log. This utility can help you identify a problematic
transaction or gauge transaction activity that corresponds to a period
of high utilization, as indicated by your periodic snapshots of database
activity and system-resource consumption.
Using the onstat utility to monitor transactions
If the throughput of transactions is not very high, you
can use some onstat utility commands to identify a transaction
that might be a bottleneck.