In case of severe server "overload", with postscreen(8) complaining about lookup and update times around 400ms almost every mail, is it (reasonably) safe as a last desperate measure to put $data_directory, or at least the file referenced by $postscreen_cache_map, on a ramdisk (e.g. "tmpfs" with Linux)?
I know about RAM not being persistent across reboots, and I understand what happens if the $postscreen_cache_map (or all the contents in $data_directory) are lost. Stefan
