MEXTEX Help

8. The Statistics window

The contents of the statistics window is updated periodically, where the period is determined by the Thread Statistics Report Period located among the Operational controls. It should be noted that thread statistics are cleared at the beginning of each update period, collected for that period and a summary then written to the statistics window at the end of that period.

The contents of the statistics window can be written in ASCII to an external file, either by user manipulation of the GUI menu button Dump Statistics ..., or by using the remote control facility of MEXTEX.

The window itself is comprised of 6 columns, and a pair of rows for each open device being exercised. The six columns are

Device ID

Determines the device number and whether that row is reporting statistics for read threads (R) or write threads (W). The actual device name can be determined from the device ID by referring to the list of open device among the Operational controls.

Min. Time

The smallest completion (response) time of thread I/Os for that sampling period.

Ave. Time

The average completion (response) time of thread I/Os for that sampling period.

Max. Time

The largest completion (response) time of thread I/Os for that sampling period.

IOPS

The thruput displayed in IOPS (I/Os-per-second) for that sampling period.

Ave. Tput

The thruput displayed in MB/sec for that sampling period.