7.6.4 -XX:HitachiVerboseGCIntervalTime

-XX:HitachiVerboseGCIntervalTime specifies the interval (in seconds) for outputting the extended verbosegc information.

Description

-XX:HitachiVerboseGCIntervalTime specifies the interval (in seconds) for outputting the extended verbosegc information.

If this option is specified:

The extended verbosegc information for the GC that occurs after the specified interval elapses is output. The extended verbosegc information is not output for every GC. In addition, the number of times that the types of GC below were skipped during the period from the previous output to the current output, is also output. This information is always output.

Table 7‒5: List of types of GC for which the number of times the GC was skipped is to be output
Character string	Description
`Full`	Number of times full GC was skipped
`Copy`	Number of times CopyGC was skipped

If this option is not specified:

0 seconds is set by default, and the extended verbosegc information is output for each GC.

Prerequisite option

-XX:+HitachiVerboseGC

Syntax

-XX:HitachiVerboseGCIntervalTime=integer_value

Specifiable values

integer_value

Type: Integer

Specify an integer value (in seconds) from 0 to 2,147,483,647. If you specify a value outside of the specifiable range, 0 is set. If you specify a negative value, an error occurs.

Default value

If the definition item is omitted:: -XX:HitachiVerboseGCIntervalTime=0

Examples

Example 1 (if SerialGC is selected when the -XX:+HitachiVerboseGC option is selected)

[VGC]<Thu Oct 02 10:38:53.658 2014>(Skip Full:1,Copy:0)
[Full GC 770K->682K(8064K), 0.0050003 secs][DefNew::Eden: 88K->0K(2304K)]
[DefNew::Survivor: 0K->0K(256K)][Tenured: 681K->682K(5504K)] 
[Metaspace: 3634K(4492K, 4492K)->3634K(4492K, 4492K)]
[class space: 356K(388K, 388K)->356K(388K, 388K)] 
[cause:System.gc][User: 0.0000000 secs][Sys: 0.0000000 secs]
[IM: 11944K, 12448K, 0K][TC: 22][DOE: 0K, 0][CCI: 1173K, 245760K, 2496K]

Example 2 (if SerialGC is selected when the -XX:+HitachiCommaVerboseGC option is selected)

VGC,Thu Oct 02 10:38:52.442 2014,1,0,0,Full GC,770,682,8064,0.0040002,88,0,2304,
0,0,256,681,682,5504,3634,3634,4492,3634,3634,4492,356,356,388,356,356,388,1,0.
0000000,0.0000000,11913,12448,0,22,0,0,1173,245760,2496

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