What is the difference between a lock and a latch?
Click to see full answer
Then, how does a latch lock work?
Once the bolt passes a certain point, it will fully extend and quickly lock into the strike plate due to the pressure being released from the spring, securing the door and holding it closed. Latches are designed to retract and disengage when someone turns the door handle to open the door.
Secondly, what is lock and latch in SQL Server? Latches are internal to the SQL engine and are used to provide memory consistency, whereas locks are used by SQL Server to provide logical transactional consistency. Above answer is taken from the old, but extremely relevant white paper written in the year 2011.
Similarly one may ask, what is latch in DBMS?
Latches are low level serialization mechanisms used to protect shared data structures in the SGA. The implementation of latches is operating system dependent, particularly in regard to whether a process will wait for a latch and for how long. A latch is a type of a lock that can be very quickly acquired and freed.
What is a Latchbolt?
Latchbolt. A common latch type, it is a spring-loaded bolt with an angled edge. When the door is pushed closed, the angled edge of the latchbolt engages with the lip of the strike plate; a spring allows the bolt to retract.