[extractor] Sorting used nodes        ... Caught Execption:stxxl::sort(): INSUFFICIENT MEMORY provided, please increase parameter 'M'

opengeo@opengeo:~/write/Project-OSRM-master/build$ ./osrm-extract RU-PSK.osm
[info] Input file: RU-PSK.osm
[info] Profile: profile.lua
[info] Threads: 8
[info] Using script profile.lua
[STXXL-MSG] STXXL v1.3.1 (release)
[STXXL-MSG] 1 disks are allocated, total space: 1000 MiB
[info] Using turn restrictions
[info] Found 3 exceptions to turn restrictions:
[info]   motorcar
[info]   motor_vehicle
[info]   vehicle
[info] Parsing in progress..
[info] Parsing finished after 54.571 seconds
[extractor] Sorting used nodes        ... Caught Execption:stxxl::sort(): INSUFFICIENT MEMORY provided, please increase parameter 'M'
[info] extraction finished after 54.8164s
[info] To prepare the data for routing, run: ./osrm-prepare RU-PSK.osrm