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Viewing the Detailed Information About the Garbage Collection

When you select a garbage collection, the Details section of the GC Events tab changes name to either Details - Old Collection or Details - Young Collection depending on the type of garbage collection you have selected (this is only possible when selecting one garbage collection). You will also see different sets of tabs that contain specific information about the garbage collection that you have selected (see Figure 6-6).

Figure 6-6 Tab differences when viewing old and young collections

Tab differences when viewing old and young collections

Each one of these tabs are described here. As much of the information in the tabs are fairly self-explanatory, those types of details will not be covered in the documentation.

This section describes the following tabs:

Viewing Information on the General Garbage Collection Tab

The General tab (see Figure 6-7) displays information such as start time and end time of the garbage collection.

Figure 6-7 The General garbage collection tab

The General garbage collection tab

Viewing Information on the GC Method Call Tree Tab

The GC Method Call Tree tab (see Figure 6-8) shows an aggregation of the call traces of the threads triggering a garbage collection.

Figure 6-8 The GC Method Call Tree tab

The GC Method Call Tree tab

Viewing Information on the Old/Young Collection Tab

The name of this tab is dynamically changed when you select a garbage collection instance in the Garbage Collections section. Here you find information about nursery, mark and sweep pause times, etc. (see Figure 6-9).

Figure 6-9 The Old/Young Collection tab

The Old/Young Collection tab

The information below is only valid for old collections:

Viewing Information on the Cache Lists Tab (Only valid for old collections)

The Cache Lists tab (see Figure 6-10) the specification for the different cache lists. Each cache list contains settings for upper and lower cache size.

Figure 6-10 The Cache Lists tab

The Cache Lists tab

The Pause Time Tab

The information under the Pause Time tab is mainly intended for BEA JRockit internal use when you have sent a JRA recording for analysis to the JRockit engineering team.

The Cache Lists tab

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