SUM Java Heap Space

Hello,

I'm updating SAP Enteprise Portal and I'm getting an error during the last phase (SUMMARY).

Error message are:

Nov 11, 2014 3:04:37 PM [Error ]: The following problem has occurred during step execution: java.lang.OutOfMemoryError: Java heap space (failed to allocate 127384 bytes).

I've tried to add more memory to maxHeapSize in JVM Parameters into configtool.

But the value changes every time I execute repeat phase in SUM.

What I must to change?

Regards.