On Sep 13, 2012, at 18:59 , Chris Schanzle wrote: > In our experience, if memory is allocated and never touched, it's like you > never allocated it at all (with respect to swap). Allocated but untouched > pages will not be swapped.
Right, but they do count as "committed". Thus, once overcommitment of virtual memory is turned off, such allocations may fail even if they would not have caused any problems. Unfortunately, the kernel can't know. Having overcommitment turned off, and sufficient swap space (much of which is never used in this case), is probably the "sane" setup Winnie us looking for. -- Stephan Wiesand DESY -DV- Platanenenallee 6 15738 Zeuthen, Germany
