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A related concept is the "space leak", which is when a program consumes excessive memory but does eventually release it. [ 3 ] Because they can exhaust available system memory as an application runs, memory leaks are often the cause of or a contributing factor to software aging .
Static random-access memory (static RAM or SRAM) is a type of random-access memory (RAM) that uses latching circuitry (flip-flop) to store each bit. SRAM is volatile memory ; data is lost when power is removed.
Another reason for the disparity is the enormous increase in the size of memory since the start of the PC revolution in the 1980s. Originally, PCs contained less than 1 mebibyte of RAM, which often had a response time of 1 CPU clock cycle, meaning that it required 0 wait states.
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Dynamic random-access memory (dynamic RAM or DRAM) is a type of random-access semiconductor memory that stores each bit of data in a memory cell, usually consisting of a tiny capacitor and a transistor, both typically based on metal–oxide–semiconductor (MOS) technology. While most DRAM memory cell designs use a capacitor and transistor ...
Several approaches have been developed to deal with unwanted bit-flips, including immunity-aware programming, RAM parity memory, and ECC memory. This problem can be mitigated by using DRAM modules that include extra memory bits and memory controllers that exploit these bits.
Refreshing does not employ the normal memory operations (read and write cycles) used to access data, but specialized cycles called refresh cycles which are generated by separate counter circuits and interspersed between normal memory accesses. [5] [6] The storage cells on a memory chip are laid out in a rectangular array of rows and columns.