Hello,
I have the following table with the following columns:
large_a: text (few dozen characters up to a few hundred)
large_b: text (few dozen characters up to a few hundred)
The table has several million rows. The DB is running on a large machine.
I perform the following query:
select large_a from table;
The first query takes a few minutes. Afterwards I see that the cache in memory has grown. Next query only takes a few seconds.
What I want to know:
Does the cache also contain large_b? Or is only large_a cached? Assumption is that memory is large enough to fit everything.