On 12/11/2013 07:10 AM, Götz Reinicke - IT Koordinator wrote: > Am 10.12.13 17:18, schrieb John R Pierce: >> On 12/10/2013 6:01 AM, Götz Reinicke - IT Koordinator wrote: >>> recently I noticed, that one of our webservers is using swap space, >>> while there is plenty of physical ram available. >>> >>> free -m >>> total used free shared buffers cached >>> Mem: 8118 2014 6103 0 85 261 >>> -/+ buffers/cache: 1667 6450 >>> Swap: 8197 77 8119 >>> >>> >>> It's not that much, but why? >> >> during idle time, dirty pages will be written to swap so they can then >> be discarded if needed. ignore it, it means nothing > > Hi thanks to all feedbacks, I'f found that the httpd is eating up swap; > currently about 500MB while 4GB RAM are still free. I wouldn't worry about it. It's quite normal for a long-running process like httpd to have a few pages that are used once during startup and never referenced again. Eventually, the kernel moves them out to swap in preference for some extra buffer/cache space. Why you would prefer keeping long- unreferenced pages in RAM is unclear. Of course if it is just a question of why one server is behaving differently from the others, that is a different matter. -- Bob Nichols "NOSPAM" is really part of my email address. Do NOT delete it.