Apache restart problem

[borzu]

Thanks Nikolas,
Actually first I needed to install apache2-mpm-prefork, as apparently it was not included in ispcp default set up. I applied your suggested settings and now my sandbox vps works fine on about 360 MB memory in contrast to previous 500+MB. Also the restart problem and the 500 error are gone.

I am totally noob in apache stuff, used to use nginx (I am loving it . Have you any suggestion to know about apache configuration and optimisation? This giant should somehow be squeezed!

I am also a bit put off about the amount of memory that ispcp-apache-lo demon consumes. (currently 3 processes each 1.8%MEM) is there some way to ispcp footprint?