Michael Green wrote: > How one can tell how much precisely physical memory is free on a given system. > > I mean if I run: > # free -m -t > total used free shared buffers cached > Mem: 2025 1880 145 0 40 87 > -/+ buffers/cache: 1752 273 > Swap: 4109 1723 2386 > Total: 6135 3603 2532 > > Looking at the table above I might conclude that 145M is all that's > left. but apparently this is not so, because a big chunk of RAM is > used for disk cache and can be quickly released/recovered should a > portion/all of that memory requested by a malloc. > > I'm trying to fugure out how much physical memory the system has > available at any given time. How can this be calculated, using what > numbers? > Use the "-/+ buffers/cache:" line. You are using 1752M and have 273M free. > > Another question is how a group of users can be limited in terms of memory. > I have a system here that's starved by IO and I want ot prevent users > jobs allocating big chunks of swap. say if I have a Linux system with > 2G of RAM and 4G of swap is it possible to allocate to a _group_ of > users 1700M only? > You may want to look at the ulimit command. Mikkel -- Do not meddle in the affairs of dragons, for thou art crunchy and taste good with Ketchup!
