Hi, When I load a 1G XML file to MonetDB/XQuery, it throws exceptions as follows. I did not find related parameters in the monetDB config file to enlarge the heap size. I wonder how I can solve this problem? Thank you. #GDKmmap(1073741824) fails, try to free up space [memory in use=156511940,virtual memory in use=1309212672] #GDKmmap(1073741824) result [mem=156511940,vm=1309212672] MAPI = mozhou@localhost:40000 QUERY = pf:add-doc("/.../new1GL1Comp/xmldoc3.xml","1GL1doc3") ERROR = !ERROR: [shred_url]: 1 times inserted nil due to errors at tuples 0@0. !ERROR: [shred_url]: first error was: !ERROR: HEAPextend: failed to extend to 1073741824 for 03/02/30243theap !ERROR: shredBAT_append_str: APPEND-STR[_prop_text](http://www4.wiwiss.fu-berlin.de/bizer/bsbm/v01/instances/dataFromVendor20/Of...), BUNappend fails !ERROR: CMDshred_url: operation failed. -- Thanks, Mo