Looking for a database backup plugin

I am looking for a *simple* database backup plugin. I need something simple. It just needs to backup the database *locally* to somewhere under the wordpress tree. I don’t need cloud backup and I don’t want the backup e-mailed to me. I have tried several with various levels of failure and/or unnecessary complexity (one completely crashed my site while trying to save its settings).

(I have complete control of my VPS and have a file-system level backup system in place that backs up the server’s file to Amazon S3. I don’t need a plugin to backup the site *files* — that is already being taken care of.)