After spending a long time editing long pages, on saving the changes you may be prompted for a read password.
If you control the php implementation, try increasing the
You could perform this from the vhost configuration with this command
However, if you have your wiki on a shared server, other people may hijack/purge your sessions, so you'd have to provide a directory for holding the sessions. Create a directory under your wiki area (e.g. pub/sess/), chmod 777 pub/sess, then put this in config.php:
Then copy the .httpauth from wiki.d to pub/sess.
(For more detail, check php docs for Session handling functions)
See discussion at FixShortSessions-Talk