I was debugging a php memory issue yesterday, and noticed that at some point my get_memeory_usage() value became much, much smaller than the memory footprint re

I was debugging a php memory issue yesterday, and noticed that at some point my get_memeory_usage() value became much, much smaller than the memory footprint recorded by top (20 MB in get_memory_usage(), 500 MB in top RES). It was a sudden jump during a loop execution according to top. Does top give accurate memory estimates for php scripts?