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

-Xmco

Sets the expansion step for the memory allocated to store the ROM portion of loaded classes.

-Xmco<size>

Each time more memory is required to store classes in ROM, the allocated memory is increased by this amount. By default, the expansion step is 128 KB. Use the -verbose:sizes option to determine the value that the VM is using. If the expansion step size you choose is too large, OutOfMemoryError is reported. The exact value of a "too large" expansion step size varies according to the platform and the specific machine configuration.

Parent: Garbage Collector command-line options

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