htop shows 5.62/10 ram but process takes up more than 90%

vincix · 08-20-2018, 11:07 AM

HTOP says that only 5.62GB out of 10GB is being used, but it also says that varnishd takes up 94.4%, as you can see in the picture. I don't understand where the logic to that is. The same is happening in top (which names varnish "cache-main" - don't know exactly why that is).

Code:

free -m
              total        used        free      shared  buff/cache   available
Mem:          10240        4786           4         982        5449        5453

Any ideas how I can interpret this percentage?

pan64 · 08-20-2018, 11:36 AM

have you seen www.linuxatemyram.com already?
And also did you check the documentation of varnishd? https://varnish-cache.org/docs/6.0/t...roduction.html

vincix · 08-20-2018, 11:41 AM

I wasn't afraid that my ram was gone, I know how to interpret free (-m), and I know roughly what buff/cache and available mean. But that doesn't imply that I know what top says when it displays that percentage. So what you're implying is that it also takes into consideration the buff/cached ram? Even if it did so, I still have around 5GB completely free, so the percentage must be referring to something else.

vincix · 08-20-2018, 12:04 PM

Moreover, if the RES of varnish reached 9665MB, how come free and top/htop itself shows that only about half of the total RAM is taken up?
I should also mention that a while ago I added ram while varnish was running without restarting it. Not sure if this percentage has anything to do with it.

pan64 · 08-20-2018, 01:38 PM

Quote:

Originally Posted by vincix

I wasn't afraid that my ram was gone, I know how to interpret free (-m), and I know roughly what buff/cache and available mean. But that doesn't imply that I know what top says when it displays that percentage. So what you're implying is that it also takes into consideration the buff/cached ram? Even if it did so, I still have around 5GB completely free, so the percentage must be referring to something else.

That's why you need to read that page (and also there is a link at the bottom to read more details).

vincix · 08-20-2018, 03:03 PM

Yes, I think I got used to seeing only "Free" (some version of free didn't output the "Available" column) in the output of "free" command and that's why I said that those 5GB are completely free. Indeed, they aren't. They're used, but available.

I actually did read some of the documentation from varnish, but there are still things I find hard to understand.