There should be a page listing ways to get system statistics, how to interpret them, and some example/expected values.
IRC, frenode, #hurd, 2012-11-04
<mcsim> Hi, is that normal that memory cache "ipc_port" is 24 Mb already? Some memory has been already swapped out. <mcsim> Other caches are big too <braunr> how many ports ? <mcsim> 45922 <braunr> yes it's normal <braunr> ipc_port 0010 76 4k 50 45937 302050 24164k 4240k <braunr> it's a bug in exim <braunr> or triggered by exim, from time to time <braunr> lots of ports are created until the faulty processes are killed <braunr> the other big caches you have are vm_object and vm_map_entry, probably because of a big build like glibc <braunr> and if they remain big, it's because there was no memory pressure since they got big <braunr> memory pressure can only be caused by very large files on the hurd, because of the limited page cache size (4000 objects at most) <braunr> the reason you have swapped memory is probably because of a glibc test that allocates a very large (more than 1.5 GiB iirc) block and fills it <mcsim> yes <braunr> (a test that fails with the 2G/2G split of the debian kernel, but not on your vanilla version btw)
IRC, frenode, #hurd, 2013-01-26
<braunr> ah great, one of the recent fixes (probably select-eintr or setitimer) fixed exim4 :)