Prevent JVM from swapping

import com.sun.jna.Native;

public final class LIBC {

public static final int MCL_CURRENT = 1;
public static final int MCL_FUTURE = 2;

static {
Native.register("c");
}

public static native int mlockall(int flags);
public static native int munlockall();
private LIBC() {}
}

LIBC.mlockall(LIBC.MCL_CURRENT | LIBC.MCL_FUTURE);

On Solaris box you can do: -XX:+UseISM