You could use your web servers log files. If you cant, there are serveral other ways:
Please have a look at http://wiki.splitbrain.org/wiki:tips:logging
"... describes how Dokuwiki could be extended with a log. This might be helpful if the web server’s log files are out of range and some statistics about Dokuwiki’s usage is needed."
"This adds a simple counter for your Dokuwiki pages"
"Adding access count to your DokuWiki pages"
I think this task could be closed.