Files / DiskOpen Entity

The Files / DiskOpen Entity screen presents the MEASURE DiskOpen entity.

The MEASURE DiskOpen entity is I/O activity on a file from an opener process perspective.  One entry is present for every open to a file.

The MEASURE DiskOpen entity does not store the Opener Process Name, only the Opener CPU and Opener PIN .  The Opener Process Name column is derived by looking up the current process name at the CPU  & PIN currently running at that location.

An approach to diagnosing disk drive performance issues:

• Drill down starting at the volume level, working down sequentially through the DiskFile, DiskOpen and finally to the process level.
• Starting from the Disk Entity screen, right click on a volume and select DiskFile Entity to see all of the active files on the disk.
• On an entry on the DiskFile Entity screen, select DiskOpen Entity to see all of the processes accessing the file.
• On an entry on the DiskOpen screen, click to view the opener process of that file in detail.