Paging is a technique with the help of which we can divide the memory into pages which help us to easly access the files and it also decreases the Execution time (Saves SYSTEM time). It also creates a mirage of Memory.
RAM = Random Access Memory
Because of different in speeds of cpu the system bus and the memory circut
Random access memory (RAM) is the machine's working memory. All programs and data must be loaded into RAM in order for the central processing unit (CPU) to execute those programs.
Let's say you have a set of 100 pieces of data, which are all names. Now, if you want to find a specific name, "Kevin", you can find it in different ways. You could either go through each of the records one after another, or you could randomly generate a number, and check if that record is "Kevin", this is potentially faster than sequential access as "Kevin" could be the last record.
The formula to calculate the average memory access time in a computer system is: Average Memory Access Time Hit Time Miss Rate x Miss Penalty
The time required by a processor to access data or to write data from and to memory chip is referred as access time.
The time required by a processor to access data or to write data from and to memory chip is referred as access time.
Access time(T) = HXAM + (1-H)(AM + PT) where H = hit rate, AM = Associative Mem ref time, PT = Page Table access time.
memory access time.
cache memory
access times from memory is 200,000 times faster than access times from storage devices due to the mechanical movement involved.
it is defined by access time and cycle time
access times from memory is 200,000 times faster than access times from storage devices due to the mechanical movement involved.
Faster access time, greater cost per bit; greater capacity, smaller cost per bit; greater capacity, slower access time. As a general rule (but there are exceptions) the greater the capacity of a memory the longer the access time. For a higher cost the access time of a given capacity memory can usually be shortened some. As a general rule (but there are exceptions) the greater the capacity of a memory the total memory cost increases, but the memory cost per bit decreases.
Drum.
cache memory refreshes instantly so access time is faster