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First step of answering a question

I think everyone knows that for answering a question, the first step is to understand the question. It is not a big deal, but how important is this step? For a student this matter is quite clear and for who dealing with algorithms much more. I remember one day my teacher asked us to solve a maths exercise, I didn’t understand the question so I asked teacher to explain the question and she explained after she asked us, Did you get it? Everyone replied “No”, She explained again, I didn’t get it, my classmate next to me said “yes, I got it”, so I asked my classmate to explain it for me, surprise! He didn’t understand it, the reason he said was maybe he doesn’t want to look stupid. Ok, I asked teacher for third time and this time I got the question so the answer was so easy, I asked my classmate who previously said that he understand the question, did you get it now? He said “No”. After teacher left our desk, I explained it for my classmate and straight away he told the answer. Oh it was so easy. Sometimes students want to do assignment before understanding the requirement even before revising the lectures. I always tried to concentrate on the question before guessing the answer. This matter is extremely important when you are dealing with customer and database because your art is to do whatever you have been asked to do and not whatever you think is right.

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I solved GCHQ puzzle and this is how I did it

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Why Prestashop needs improvement for large application?

I have worked with Prestashop 1.6 long enough to know inside/outside of the application and even I developed few modules myself, all is simple and great but in small scale. My application is big, I am talking about millions rows in database. Two databases weight almost 18G (see the picture).

One day at 2AM I received a notification that my website/application is down. I looked at the server the application seems OK but the databases gone crazy big, (see the picture) it has gone from 18G to over 90G less than 6 hours. 
Since there was almost none free space left on the server, all server running really slow even I could not restart NGINX. All was frozen. All my websites/applications run on dedicated server on UKFast, so none of websites would work because all is glued together. 
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