Increasing the swap file size really solves the «proc_open(): fork failed - Cannot allocate memory» failure Composer issue

Administration
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1

You need to increase your server’s swap file size.
Now it is too small:

See details here: How to fix the «proc_open(): fork failed - Cannot allocate memory» failure on a Composer command?

2

You can stop mysql service in order for first command to work

3

It is not a quality solution.
The quality solution is to follow the official Composer recommendation.

4

Swap is installed and already put to 1Gb. Do you think that increasing it to 2Gb will fix the issue?

5

I think so, because, as the screenshot above shows, only 1/3 (363 Mb) of the swap file are free now.

6

Try now please.

7

It has really solved the problem:

I will proceed now to the next installation step.
Do not do anything with the website yet.

8

Great, thanks!