Tucked Away In RedHat Enterprise Server 5’s targeted SELinux Policy …
Posted by Stuart Herbert @ 10:38 AM, Wed 25 Apr 07
Filed under: Toolbox
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… is this little labeling rule in the file contexts:
/usr/lib(64)?/httpd/modules/libphp5\.so — system_u:object_r:textrel_shlib_t:s0
Does this mean that RedHat is shipping a mod_php5 that isn’t compiled for relocatable code support? (See my earlier post on compiling PHP as relocatable code). If they are, according to this page by Ulrich Drepper (hey, doesn’t he work for RedHat? 
) then RedHat Enterprise Server 5’s copy of mod_php5 might be using more RAM per Apache process than necessary, which will impact scalability and capacity.