Messages in this thread | | | Subject | Re: computing drop-able caches | From | Daniel Walker <> | Date | Wed, 10 Feb 2016 11:11:26 -0800 |
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On 02/10/2016 10:13 AM, Dave Hansen wrote: > On 02/10/2016 10:04 AM, Daniel Walker wrote: >>> [Linux_0:/]$ echo 3 > /proc/sys/vm/drop_caches >>> [Linux_0:/]$ cat /proc/meminfo >>> MemTotal: 3977836 kB >>> MemFree: 1095012 kB >>> MemAvailable: 1434148 kB >> I suspect MemAvailable takes into account more than just the droppable >> caches. For instance, reclaimable slab is included, but I don't think >> drop_caches drops that part. > There's a bit for page cache and a bit for slab, see: > > https://kernel.org/doc/Documentation/sysctl/vm.txt > >
Ok, then this looks like a defect then. I would think MemAvailable would always be smaller then MemFree (after echo 3 > /proc/sys/vm/drop_caches).. Unless there is something else be accounted for that we aren't aware of.
Daniel
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