Heartbeat Control
Heartbeat Control lets you manage the WordPress Heartbeat API that sends AJAX requests in the background while you work in the admin. By default Heartbeat runs every 15-60 seconds to check for auto-saves, show post locking, and update notifications. On busy sites or shared hosting, this can cause server load. The module lets you slow down the heartbeat interval, disable it on certain pages, or turn it off completely where not needed.