What is Cache Memory? Definition, Functions, and Types

If you frequently use internet technology through various devices or browsers, the term cache memory will not be foreign to you.

In short, cache memory is an additional memory system that stores frequently used instructions and data by a system. 

The goal is to get faster processing on the CPU (central processing unit) of the computer without accessing the main memory.

If you want to know more about cache memory, you are reading the right article. This article will discuss everything you need to know about cache memory. 

{jistoc} $title={Table of Contents}

What is Cache Memory?

Basically, cache memory is a small type of computer memory that provides instant high-speed data access to the processor.

Good design is making something intelligible and memorable. Great design is making something memorable and meaningful.

Dieter Rams

Cache memory is the fastest memory on a computer. Generally, cache memory is integrated into the motherboard and directly embedded in the processor or RAM. This cache memory also acts as an intermediary between RAM and CPU. 

Every time the processor accesses data for the first time on a computer, a copy of the data is created and cached. When that data is accessed again, if a copy is available in the cache, it is accessed first, resulting in increased speed and efficiency. 

However, if a copy is not available, then the processor will access larger memory such as RAM or a new hard drive.

This is one of the reasons why cache memory can reduce the processing time of a device. In other words, if the CPU finds the required data or instructions in the cache memory, the device does not need to access the main memory (RAM).

As a result, processing becomes faster because the processor does not have to wait for data and instructions to be fetched from the RAM.

In addition, the larger the cache memory of a computer, the faster and more efficient the device's performance.

Because of these factors and their relatively small size, installing cache memory is more expensive than installing RAM.

Levels of Cache Memory

Cache memory also has different levels:

1. Internal cache, level 1 — internal cache memory installed on the processor has the fastest processing and is the most expensive. The size of this level 1 cache memory is about 8KB to 128KB.
2. External cache, level 2 — has a capacity greater than 256 KB up to 2Mb. Even so, this L2 cache does have a slower process than L1.
3. Main memory, level 3 — this is the cache memory where the computer is currently running. It is small in size, and once the power is turned off, data is no longer stored in level 3 memory.
4. Secondary memory, level 4 — secondary memory is external memory that is not as fast as main memory but stores data permanently.

Functions of Cache Memory

Here are some functions of cache memory:

• Speed ​​up the process of accessing data on a device. 
• Lighten the workload of the device processor.
• Speed ​​up device memory performance and performance.
• Intermediate between CPU, RAM, and main memory.

Types of Cache

Basically, cache is a high-speed storage system that temporarily stores data and instructions.

In the computing process, cache actually has many different types. One of them is the cache memory.

Here is an explanation of several other types of cache besides cache memory and a brief explanation. 

• Disk Cache

Disk cache is cache memory used to speed up the process of storing and accessing data from the host hard disk. 

This disk cache enables faster processing of reads/writes, commands, and other input and output processes between the hard disk, memory, and computing components.

• WebCache

Web caching is the activity of storing data such as copies of web pages served by web servers for later use. 

Whenever content is downloaded from the origin server, a copy is stored in the web cache for a certain period of time specified by the caching rules you define. 

If another user requests the same content again, the web cache sends the stored content to the user's web.

• Cache Server

A cache server is a dedicated network server or service that acts as a server that stores web pages or other Internet content locally. 

With pre-requested information in temporary storage, cache servers speed up access to data and reduce bandwidth usage. 

The cache server also allows users to access content offline, including rich media files or other documents. 

Conclusion

Cache memory provides faster data storage and access by storing programs and data that the processor regularly accesses.

In this article, we have covered everything you need to know about cache memory. Starting from the meaning, function, and types.

Hope this article was useful! If you still have further questions about cache memory, feel free to leave a message in the comments column.