Apache error help

[notdku]

I can't keep Apache online. It will get to the point where only certain PHP scripts will respond.

Here is the errors it gives while it's crashing:

[Tue Aug 22 12:58:54 2006] [notice] child pid 29075 exit signal Segmentation fault (11)
[Tue Aug 22 12:58:54 2006] [notice] child pid 29099 exit signal Segmentation fault (11)
[Tue Aug 22 12:59:00 2006] [notice] child pid 29041 exit signal Segmentation fault (11)
[Tue Aug 22 12:59:00 2006] [notice] child pid 29050 exit signal Segmentation fault (11)
[Tue Aug 22 12:59:01 2006] [notice] child pid 29147 exit signal Segmentation fault (11)

I have no large log files.

[notdku]

Also before that starts, this begins:

Allowed memory size of 52428800 bytes exhausted (tried to allocate 0 bytes)
Allowed memory size of 52428800 bytes exhausted (tried to allocate 0 bytes)
Allowed memory size of 52428800 bytes exhausted (tried to allocate 0 bytes)
Allowed memory size of 52428800 bytes exhausted (tried to allocate 0 bytes)
Allowed memory size of 52428800 bytes exhausted (tried to allocate 0 bytes)
Allowed memory size of 52428800 bytes exhausted (tried to allocate 0 bytes)
Allowed memory size of 52428800 bytes exhausted (tried to allocate 0 bytes)