SQL Server distinguishes between 3 different types of latches: 1  IO Latches. 2  Buffer Latches (BUF) 3  Non-Buffer Latches (Non-BUF) Letâs have a more detailed look at these 3 different variations. I/O Latches are used by SQL Server when outstanding I/O operations against pages in the Buffer Pool are done â when you read and write from/to your storage subsystem.
The pharyngeal muscles are a group of muscles that act upon the pharynx. Pharyngeal muscles contracts pushing the food into the oesophagus.There are two muscular layers of the pharynx: the outer circular layer and the inner longitudinal layer.The outer circular layer includes: 1  Inferior constrictor muscle.2  Middle constrictor muscle.haryngeal muscles contracts pushing the food into the oesophagus. There are two muscular layers of the pharynx: the outer circular layer and the inner longitudinal layer. The outer circular layer includes: 1  Inferior constrictor muscle. 2  Middle constrictor muscle.
the esophagus moves food from your moth to your stomach through muscle contractions called peristalsis. The esophagus moves food downward by peristalsis with digestion taking place. the main function of the esophagus is to get the food and water down, or if you are eating upside down up to the stomach from the mouth.he passage food takes from mechanical digestion in the mouth to digestion in the stomach. It's function though is to help and provide a place for the food to travel down to your stomach. It carries the food from the pharynx to the stomach.