G.11 T

think time
The elapsed time between the prompt for input and the completion of the input.

The interval between the moment when the system is ready for a transaction (for example, when a DCL prompt is printed) and when the transaction is started (for example, when the Return key is pressed). The time it takes to type a command is included in think time.

See also interactive transaction and response time.

throughput
(1) The measure of how much data is sent, or can be sent, between two points in a specified unit of time.

(2) The amount of work done per unit time. Typical examples are system throughput (the number of transactions per second) or disk I/O throughput rate (the number of disk I/Os per second).

timesharing system
A system in which users at terminals, workstations, or PCs submit jobs to be processed by the system in a round-robin fashion.
token
A special frame that controls the right to transmit on the FDDI ring. Each node has a timer that controls how long the node can hold the token.
transaction-based system
A system in which transactions arrive in a regular stream, are processed by the system, and depart.
transient process
A process present during the entire analysis period, that does not not log in or out, and has no interactive transactions, but which uses some system resources. This includes processes that log in but not out, and that log out but not in.

By default, transient processes are automatically assigned to the last defined (noninteractive) class provided this class is of type All and has a load limit of 0.0. If the last user-defined class does not have these characteristics, the tool automatically creates such a class for you. The name of the created class is CLASSn where n is one greater than the number of user-defined classes.

true I/O
(1) Disk I/O without the hard page fault I/O.

(2) Actual I/O due to direct program I/O requests rather than I/O requests supporting the memory management system.

(3) Real, physical I/O, excluding page fault I/O.


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