Using the File I/O Page

The File I/O page contains information about read/write activity to/from the file system.

This page displays its information in both tables and graphs.

Using the File I/O Page: Selections and Aspects

Use the drop-down menus at the top of the page to choose a selection and aspect if desired. Data from other pages can be saved to the selection drop-down menu by dragging an area of a chart (or selecting data from a table) and choosing Store Selection or Store Selection and Set As Focused Selection from the context menu.

The following controls provide additional behavior:

Show concurrent: Show all events concurrent to the selected aspect.
Contained: Only show events that are fully contained in the time range from the active selection aspect
Same threads: Only show events in threads related to the active selection aspect.
Time Range: Zoom to time range on relevant places on the page, or clear the time range zoom.

Using the File I/O Page: Tables and Graphs

Table columns are labeled as follows:

Path : The file system path where data was read/written.
Total I/O Time: An estimate of the total time a thread is busy with I/O. The actual total may be higher.
Count: The sum of all read/write counts.
Read Count: The total number of file reads.
Write Count: The total number of file writes.
Bytes Read: The total number of bytes read from the file system.
Bytes Written: The total number of bytes written to the file system.

This page also contains three subtabs:

Timeline: Displays the span of I/O events and the amount of data read/written per time period.
Durations: Displays the distribution of the I/O event durations.
Event Log: Displays a log of the I/O events, displaying all events or a subset (depending on selections made in the other tables).

Using the File I/O Page: Configuring Rules

You can set configuration attributes for the rules associated with this page by clicking the Edit Configuration icon.

The following options are available:

File Read Peak Duration

File read duration warning limit: The shortest file read duration that should trigger a warning.

File Write Peak Duration

File write duration warning limit: The shortest file write duration that should trigger a warning.