Why does MYSQL higher LIMIT offset slow the query down?

Question

Scenario in short: A table with more than 16 million records [2GB in size]. The higher LIMIT offset with SELECT, the slower the query becomes, when using ORDER BY *prima

Answer 1

I found an interesting example to optimize SELECT queries ORDER BY id LIMIT X,Y. I have 35million of rows so it took like 2 minutes to find a range of rows.

Here is the trick :

select id, name, address, phone
FROM customers
WHERE id > 990
ORDER BY id LIMIT 1000;

Just put the WHERE with the last id you got increase a lot the performance. For me it was from 2minutes to 1 second :)

Other interesting tricks here : http://www.iheavy.com/2013/06/19/3-ways-to-optimize-for-paging-in-mysql/

It works too with strings