As per bug #615765, the contents of the OASIS files are currently read in the following way:
 * Fork & spawn into a odt2txt process and wait for it to finish
 * Get the whole stdout of the child process, whatever big it is, in a string allocated in heap.
 * Normalize the contents of the whole string and limit it up to the max number of configured words.

Currently, this can be improved in the following way:
 * Fork & spawn into a odt2txt process, without waiting for the child to finish
 * Buffered read the stdout of the child process, up to a max number of bytes predefined.
 * In each buffered read, perform the normalization, and count the number of normalized words
 * Stop the buffered read when either:
  a) No more contents to read from stdout
  b) Reached maximum number of bytes to read (1MByte for example)
  c) Reached maximum number of words to read (from conf)