Select * is very slow

Hi,
I have a table employee with 33 columns.
The table have 200 records now.
Select * from employee takes 15 seconds to fetch the data!!!
Which seems to be very slow.
But when I say select id,name from empoyee it executes in 30ms.
Same pefromance if I say select count(*) from emloyee.

Why the query is slow if I included all the columns in the table.
As per my understanding , number of columns should not be having a major
impact on the query performance.

I have increased the shared_buffres to 1024MB, but no improvement.
I have noticed that the query "show shared_buffers" always show 8MB.Why is
this? Does it mean that changing the shared_buffers in config file have no
impact?

Can anybody help?

Shaiju
--
View this message in context: http://postgresql.1045698.n5.nabble.com/Select-is-very-slow-tp3254568p3254568.html
Sent from the PostgreSQL - performance mailing list archive at Nabble.com.