SSL

Secure Sockets Layer

stop-the-world

Duration of a full garbage collection where processing stops during the collection time.

time

 

thrashing

Excessive paging due to a disparity between physical memory actually available to the

 

application and the specified maximum size for memory usage.

thread spectrum

When profiling, the distribution of thread lifetime over the possible thread states.

time slice

Time slice entries represent the life span of the current monitoring session for an application.

 

You can view data throughout the life span of a time slice.

train

Optional structure within the heap that is intermediate between the eden space and the old

 

space. The train is a related collection of smaller memory spaces (cars) that have garbage collected

 

incrementally according to the train algorithm.

train algorithm

Mathematical formula that describes incremental garbage collection of related old objects. The

 

purpose of train garbage collection is to reduce the length of pause due to GC that is visible to

 

users of the software.

visualizer

The pop-up screens where you see graphical or tabular displays of data. Visualizers provide

 

contextual controls based on the data displayed. See Using Visualizer Tool Bars (page 176)

young generation

New and/or short-lived objects in the heap. Usually garbage collections are done frequently in

 

the young generation by scavenging the eden space.

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