How can I close httpd open conncetion?

Question

I have a lot of open connection of httpd and ram usage, how can i solve this?

Answer 1

First of all, these httpd children don't really use the amount of memory that top or ps reports in. Unix uses a complicated VM copy-on-write model, so when a process forks both parent and a child think they use the same amount of memory, so does top and ps. But in fact they share (please don't mix it with IPC shared) memory until some of them modifies a VM page, and only in latter case memory consumption is increasing.

If you would use FreeBSD, there is an utility called tcpdrop, which could kill any TCP established connection. Since it's a Linux, it doesn't have this decent tool. So, you either have to kill a particular child (this will kill the connection), but the master process could react inapropriate in some cases, or restart the entire daemon (this will kill all the connections).