Out of memory Minecraft: what to do and how to get rid of this error

Many Minecraft players often encounter such a problem that they are thrown out of the game and out of memory Minecraft is written in the error log. What to do and how to solve this problem?

Essence of the question

In order to solve this problem and get rid of the error, you will have to try a little. In fact, there may be several reasons. So: how to get rid of out of memory (Minecraft), what to do to eliminate the error, and how to insure yourself against such problems in the future? First you need to know that this message usually appears for several reasons, and they are all eliminated by very simple actions.

Causes

Because of what this problem may appear:

1. The RAM of the computer is too weak, which is why the temporary memory of the computer does not cope with the load, and the game world simply does not load, as a result of which a similar error is generated.
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