On Nov 8, 2007 4:21 PM, Nathan Kroenert <[EMAIL PROTECTED]> wrote: > Hey all - > > Just a quick one... > > Is there any plan to update the mdb ::memstat dcmd to present ZFS > buffers as part of the summary? > > At present, we get something like: > > ::memstat > Page Summary Pages MB %Tot > ------------ ---------------- ---------------- ---- > Kernel 28859 112 13% > Anon 34230 133 15% > Exec and libs 10305 40 5% > Page cache 16876 65 8% > Free (cachelist) 26145 102 12% > Free (freelist) 105176 410 47% > Balloon 0 0 0% > > Total 221591 865 > > Which just (as far as I can tell) includes the zfs buffers in Kernel > memory. > > And what I'd really like is: > > > ::memstat > Page Summary Pages MB %Tot > ------------ ---------------- ---------------- ---- > Kernel 28859 112 13% > Anon 34230 133 15% > Exec and libs 10305 40 5% > Page cache 16876 65 8% > Free (cachelist) 26145 102 12% > Free (zfscachelist) 1827346 1700 xx% > Free (freelist) 105176 410 47% > Balloon 0 0 0% > > Total 221591 865 > > Which then represents the pages that *could* be freed up by ZFS in the > event that they are needed for other purposes... > > Any thoughts on this? Is there a great reason why we cannot do this? > > Also - Other utilities like vmstat, etc that print out memory...
File an RFE. I don't think it should be too bad (for ::memstat), given that (at least in Nevada), all of the ZFS caching data belongs to the "zvp" vnode, instead of "kvp". The work that made that change was: 4894692 caching data in heap inflates crash dump Of course, this so-called "free" memory does act a bit differently than the cachelist, etc., so maybe it should be named slightly differently. Cheers, - jonathan
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