On Tue, Apr 01, 2003 at 04:38:54PM -0500, Jeff Trawick wrote: > Dmitri Tikhonov wrote: > >I'm seeing some weird things happening with MaxMemFree directive > >(http://httpd.apache.org/docs-2.0/mod/mpm_common.html#maxmemfree). The > >docs say that this directive specifies the number of kilobytes after > >which the memory is returned back to the system, but I found > >evidence to the contrary: > > The docs talk about returning the storage to the heap (i.e., calling > free()). Whether passing storage to free() will cause the C library > heap code to return it to the OS is OS-dependent (and probably even > context-dependent, since there may be storage still allocated to the app > on pages with free space tracked by the heap. > You're right -- I just proved it to myself by running various tests with different amounts of memory available. When there's a lot of memory available, freed memory is not returned to the OS.
Thanks, - Dmitri.
