Error message

User warning: The following module has moved within the file system: ldap_user. In order to fix this, clear caches or put the module back in its original location. For more information, see the documentation page. in _drupal_trigger_error_with_delayed_logging() (line 1181 of /usr/local/stow/drupal-7.91/lib/drupal-7.91/includes/bootstrap.inc).

Buffer size

Any assumptions on buffer size in show and store functions?
Is it enough to define a constant of certain size?
Thanks.