On Thu, Jan 28, 2016 at 05:29:41PM -0800, Daniel Walker wrote: > On 01/28/2016 05:03 PM, Daniel Walker wrote: > [regarding MemAvaiable] > > This new metric purportedly helps usrespace assess available memory. But, > its again based on heuristic, it takes 1/2 of page cache as reclaimable..
No, it takes the smaller value of cache/2 and the low watermark, which is a fraction of memory. Actually, that does look a little weird. Rik? We don't age cache without memory pressure, you don't know how much is used until you start taking some away. Heuristics is all we can offer.
