WAL being written during SELECT * query

[Tom DalPozzo <t.dalpozzo@xxxxxxxxx>]

Hi,

I have a very big table (10GB).

I noticed that many WAL segments are being written when elaborating read only transactions like this:

select * from dati25600000000 where id >43000000 limit 1000000;

I don't understand why are there WAL writings during read only transactions.

Regards

Pupillo