I/O Operations (SAP DB) 

This provides you with an overview of the activities on the disks where the data devspaces, system devspace, and the log devspaces are stored. Use the read and write access information to determine how many I/O operations are being executed in your database system.

When the kernel trace is activated (SAP DB: System Monitoring and Analysis screen: Choose Edit ® DB kernel trace and then DB kernel trace ® Activate), you can determine whether entries are being written to the knltrace trace file.

You can run a detailed analysis of the processes that are triggering the I/O operations on the devspaces. See: Overview (SAP DB)

If there are Queues for accessing the disk area, this indicates a disk access bottleneck.

You can monitor asynchronous I/O operations triggered by backups. You can refresh the display while a backup is running. This gives an indication of the progress of the backup.

See: Backup (SAP DB)