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Re: Inexplicable memory usage after move to Debian9




On 4/27/18, Reco <recoverym4n@xxxxxxxxx> wrote:
> 	Hi.
>
> On Fri, Apr 27, 2018 at 12:26:11PM +0000, Eduardo M KALINOWSKI wrote:
>> On sex, 27 abr 2018, Simon Beirnaert wrote:
>> > The bottom line for me is that I when I shut down everything I install
>> > and manage on the system, it's still conuming about half a gig more
>> > than a system running the exact same base image right after use,
>> > without
>> > the extra memory being accounted for by monitoring tools.
>>
>> How are you determining what you call "consumed memory"?
>
> OP's original e-mail mentioned free(1), vmstat(1) and smem(1).
> All three lie :).
>
>
>> Keep in mind that the kernel will by default use almost all free memory
>> (not
>> actually used by processes and libraries) as cache space, because it
>> makes
>> no sense to leave memory just laying around. However, once it's really
>> needed, the caches will be dropped. Thus "free" memory is usually
>> reported
>> as low. Compare with "available" memory as reported by free.


Yeah, I took a shot at trying to help with this one, too, via
searching apt for "monitor memory usage". Saw a couple possibilities,
but so far nothing's reflecting what I know is going on.

smemstat was the current standout. As normal user, it said my browser
was using ~60MB or so. smemstate via root user shows closer to 1GB.
That's a big difference...

Meanwhile in reality and on a fresh reboot, "free -m" will lurch
"used" from ~350MB to ~5 1/2 gigabytes as soon as all... open browser
tabs.. are refreshed (offline). User experience of sporadic crashes
lately backs that up as pretty much verified.

Apparently ~600 tabs this morning. When a browser flashes that warning
that opening more than a few tabs has potentially negative
consequences.. they ain't just whistling Dixie... :)

Cindy.....
-- 
Cindy-Sue Causey
Talking Rock, Pickens County, Georgia, USA

* runs... in search of more (very) cheap RAM *