Max numbers of service graphs?

[Pili]

hi all
i am running nagios 2.11 on centreon 1.4.2.3.
I have php-weathermap plugin
I would like to know if theres is a max number of services that can be graphed.
I have 62 host and 125 services, and sometimes it stops drawing, or only draws for several of them...
Has anyone experienced something like that?How may services/host do you have?
Thanks in advance