process limit

my site is going completely blank. all i’m getting is a blank white screen, no errors, no nothing. it doesn’t happen all the time, but it’s infrequent and you can never guess when it’s going to come. i talked with my hosting company about it and they said that my error log was full of unresolved processes and that i needed to clear them out. i did that and it worked–but only briefly. they said that it has something to do with my code and that i would need to change my code in order to ultimately fix the problem… i have no idea how to fix this or where to go. any suggestions?