Although I stay in Putrajaya, I tend to avoid the Pasar Ramandan due to the traffic as well as the sea of people that usually flood such a market.
For Putrajaya, they have set a side an area that is clean with tarmac for vendors to sell their goods. It was also highly advertised. So, last week I went to see it.
There are hundreds of stalls selling stuff. Very colourful. Although I didn't get anything, I bet would start to spend money if I stayed on a little longer.