Does the computer clear or update cache by its self or i have to do it.?

Question

Im just wondering because i read it in a book.

Answer 1

There are several types of cache. There is the cache that is on your computer's chip; that's handled by the chip automatically.

There is the cache used by your operating system, usually referred to as virtual memory. Also handled automatically.

There is also the cache used by your web browser, you can clear that if you find that web browsing is too slow or you want to hide your usage of the computer from other parties who might check what you're doing. Unless you need to do this you do not need to clear or update the cache yourself, the web browser will handle it automatically.

Answer 2

What kind of cache is this? There are some cache behaviours.
1. Fixed cache.
This type will have one parameter, that is size. The cache will keep increasing until it reach a specified size, then it will delete the least accessed one. Example for this, are Processor cache, Hard Drive cache, etc.

2. Dynamic cache
This type will have expiration time. Whether the cache will last 1 hour, 2 hour, or 1 week, it is set by the content provider. Example like web server cache, database cache, browsers cache, file cache, and so on. It will also have a specific size. When the space is full, the oldest one created will be removed to make way for the new ones.

Answer 3

The operating system updates the cache by itself. If you would like to try a tedious experiment, you might keep track of time to load for a bunch of fairly large pictures. Call them by the numbers, 1, 2, ,3, 4. If you start loading these in order,you will note a slight delay as the harddrive recovers them. If, however, after 10, you go back and load 1, it should load almost instantly because it is sitting in cache memory. If you keep on going, repeating the test of loading an old one every 10 or 20, then abruptly, instead of loading almost instantly, the old one will take time again. This is because the operating system, having filled the cache with newer pictures, "forgot" about the older ones and used the space for newer ones. Deciding which to unload (forget) is part of the operating system's job.
The task is more complicated when the cache includes programs and documents that are being worked on. Then, instead of being "forgotten", the changed document and environment of the program have got to be written to disk (virtual memory) before something new is loaded. Then when you switch to the program, something else has to be saved and the document and program have to be reloaded. This is why switching programs becomes much faster when more RAM is added to a machine.

Answer 4

There are two types of cache -

1. Static cache - This is present inside the Microprocessor. Only the processor can update the cache.

2. Dynamic cache - This type of cache is present inside the RAM module. There are many programs that can update the RAM at a specified interval.

Answer 5

http://www.ccleaner.com/

The best thing out their to do the job you want. Windows does it (kinda) when it shutsdown/restarts. The reason I say kinda is becuase it delets the cache but their is alot of other stuff it does'nt delete that CCleaner does delete that makes your computer run faster. and best of all ITS FREE!

Answer 6

u must delete the hard drive!