"https://ps.psd.co" I don't know the reason :(.

Hello,

When i try Open “https://PS.PSD.co”,

– Very slow.
– Sometimes i see “Error establishing a database connection”.
– The Menu become very slow to show.
– Sometime Menu not appear, and appear “no categories”.

I am can’t understand what the problem exactly !

Can anyone help me to solve this error ?
Thanks.