IBM User Guide for Java V7 on Windows > Reference > Command-line options > Garbage Collector command-line options
-Xgc
Options that change the behavior of the Garbage Collector.
- -Xgc:<minContractPercent | maxContractPercent | verboseFormat>
-
- minContractPercent=<n>
- The minimum percentage of the heap that can be contracted at any given time.
- maxContractPercent=<n>
- The maximum percentage of the heap that can be contracted at any given time. For example, -Xgc:maxContractPercent=20 causes the heap to contract by as much as 20%.
- verboseFormat=<format>
- Accepted values are:
- default: The default verbose garbage collection format for this release of the SDK. See Verbose garbage collection logging.
- deprecated: The verbose garbage collection format available in earlier releases of the SDK. For more information,
see the Diagnostics Guide
![](http://setgetweb.com/p/java7/settings/diag/../sout.gif")
http://www.ibm.com/developerworks/java/jdk/diagnosis/index.html.
Parent: Garbage Collector command-line options
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