WMS performance issue

[José Vicente Higon]

Hi,
I have detected a strange behaviour in my installation of mapserver, 
when I add layers in the mapfile the request response time of any layer 
rises.
I am using mapserver 4.8.3 in kubuntu dapper.
Any clue?
Thanks in advance

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José Vicente Higón
Grupo de desarrollo de gvSIG
Conselleria de Infraestructuras y Transporte
Generalitat Valenciana
Valencia - Spain
http://www.gvsig.gva.es