During my quite long and interesting adventure with DokuWiki I have used many great and useful plugins, which I still install and configure on small DokuWiki instances. After using it extensively over a year, I have found only one plugin that can be added to that list. It is a simple, but very useful plugin to rebuild Dokuwiki index.
I constantly edit wiki over remote SSH terminal, so many page titles are stalled, but purging cache for so many pages by hand is not a solution. In that specific case the real soultion is to install and use SearchIndex Manager plugin.