How do I increase Java's heap size with the flag -Xmx<size>?

Hello Dirk, You were right about the command used to increase Java's heap size, but my loading files don't work yet. The server has memory 988g When I put 500g in the option -Xmx it raised the error below: Error occurred during initialization of VM Unable to allocate bit map for parallel garbage collection for the requested heap size. Error: Could not create the Java Virtual Machine. Error: A fatal exception has occurred. Program will exit. So I decreased it from 500 to 350 then the following error appears Out of Main Memory. You can try to: - increase Java's heap size with the flag -Xmx<size> - deactivate the text and attribute indexes. I already deactivated the indexes FTINDEX: OFF TEXTINDEX: OFF ATTRINDEX: OFF What should I do to import data into the basex? Regards, Daiane.