how to make fast unlock memory exceeders ?

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http://forums.cpanel.net – Example: User (account) has limit: 2GB od RAM. I can see that this user reached memory limit. How to unlock his site from "Internal Server Error" ? I don't want to change memory limit, but make his site working. How long his site will have Internal Server Error ? So what it depends on ? How long server will be "remember" about reaching memory limit by this user ? (HowTos)