Obsolete Update Methods
1. Synchronous update.
Note: this method is deprecated as of 1.2.12 and is not available since 1.2.16. Option DAEMON_REFRESH_ONLY is removed since 1.2.16.
This is the default method, which requires almost nothing from the server. Feeds are updated periodically, on configurable timeout and when you click on the feed. This method doesn't work all that well and can lead to numerous errors (for example, if you experience errors in refetch_callback(), feed updating takes longer than maximum script runtime and is unable to return proper information back to tt-rss frontend). Thus, you are strongly encouraged to use other update methods if you can.