I was used to having a post-commit hook trigger processing of the commit message by Trac (SVN repository). The comment (or action) was added immediately.
Now I switched to Mercurial as a VCS and Redmine as a ticketing system. Redmine does recognize information in changeset/commit messages like "refs #185" - but it takes several minutes to appear in the ticket.
Any ideas why this is? Is the routine to grab the changesets called periodically somehow?
Well, this Redmine feature request gives it away:
While I did not find a ready-made post-commit hook to update the Redmine with new changesets, the poor man's solution is cron of course. This questions discusses it: Redmine: fetch changesets from cron job