memory - この cvs2git のメモリ エラーは何を意味するのでしょうか?

Question

非常に大きな cvs リポジトリ (12GB) を cvs2git で git に移行しようとしています。これにより、パス 10 で次のエラーが発生します。

    ----- pass 10 (BreakSymbolChangesetCyclesPass) -----
Breaking symbol changeset dependency cycles...
Traceback (most recent call last):
  File "/usr/bin/cvs2git", line 70, in ?
    git_main(os.path.basename(sys.argv[0]), sys.argv[1:])
  File "/usr/lib/python2.4/site-packages/cvs2svn_lib/main.py", line 119, in git_main
    main(progname, run_options, pass_manager)
  File "/usr/lib/python2.4/site-packages/cvs2svn_lib/main.py", line 96, in main
    pass_manager.run(run_options)
  File "/usr/lib/python2.4/site-packages/cvs2svn_lib/pass_manager.py", line 181, in run
    the_pass.run(run_options, stats_keeper)
  File "/usr/lib/python2.4/site-packages/cvs2svn_lib/passes.py", line 1174, in run
    for (changeset, time_range) in self.changeset_graph.consume_graph(
  File "/usr/lib/python2.4/site-packages/cvs2svn_lib/changeset_graph.py", line 355, in consume_graph
    for (changeset, time_range) in self.consume_nopred_nodes():
  File "/usr/lib/python2.4/site-packages/cvs2svn_lib/changeset_graph.py", line 285, in consume_nopred_nodes
    (
  File "/usr/lib/python2.4/site-packages/cvs2svn_lib/changeset_graph.py", line 58, in __init__
    self._nodes = [
  File "/usr/lib/python2.4/site-packages/cvs2svn_lib/indexed_database.py", line 118, in __getitem__
    return self._fetch(offset)
  File "/usr/lib/python2.4/site-packages/cvs2svn_lib/indexed_database.py", line 107, in _fetch
    return self.serializer.loadf(self.f)
  File "/usr/lib/python2.4/site-packages/cvs2svn_lib/serializer.py", line 117, in loadf
    return unpickler.load()
MemoryError

ここに私のメモリ統計があります: MemTotal: 4017036 kB MemFree: 1830728 kB

どうすればこれを修正できますか？