IBM User Guide for Java V7 on Windows > Reference > Command-line options > Garbage Collector command-line options

-Xconcurrentslack

Attempts to keep the specified amount of the heap space free in concurrent collectors by starting the concurrent operations earlier.

-Xconcurrentslack<size>

Using this option can sometimes alleviate pause time problems in concurrent collectors at the cost of longer concurrent cycles, affecting total throughput. The default value is 0, which is optimal for most applications.

Parent: Garbage Collector command-line options

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