[HN Gopher] Explaining top(1) on FreeBSD
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Explaining top(1) on FreeBSD
Author : vermaden
Score : 66 points
Date : 2021-10-21 09:36 UTC (13 hours ago)
(HTM) web link (klarasystems.com)
(TXT) w3m dump (klarasystems.com)
| killfauci wrote:
| Fauci needs to be arrested today.
|
| NIH Admits they funded GoF Research at Wuhan.
|
| https://www.nationalreview.com/news/nih-admits-to-funding-ga...
| raj2569 wrote:
| > The topic of load average is generally very broad and it is
| calculated differently on various UNIX systems, so a separate
| article may be dedicated for just that.
|
| I have never seen an article explaining how the load average in
| Linux is calculated.
| mritzmann wrote:
| The traffic analogy is a good explanation. Here you go:
| https://scoutapm.com/blog/understanding-load-averages
| 5e92cb50239222b wrote:
| Tangentially related: modern kernels have a much better metric
| (PSI, or pressure stall information)
|
| https://lwn.net/Articles/759781/
|
| https://lwn.net/Articles/775971/
| da_chicken wrote:
| Well, that's still an aggregated value that someone decided
| to calculate based on what they thought would work best for
| what they're looking for. It's not necessarily more a correct
| definition of load, just one that is more appropriately
| actionable for the problems it's designed for.
|
| In other words, PSI is "better" for some definition of
| "better".
| 0xdeadbeee wrote:
| One thing about load average on Linux which I never really
| understood was the inclusion of processes waiting for I/O, I
| never really got a satisfying explantation until I bumped into
| this post a few years ago:
| https://www.brendangregg.com/blog/2017-08-08/linux-load-aver...
| savoyard wrote:
| "Examining Load Average" by Ray Walker:
|
| https://www.linuxjournal.com/article/9001
| tiffanyh wrote:
| Off topic question: what's the current process to make extremely
| small "minimal" freebsd server install? Is it NanoBSD[1], because
| the unfortunate downside is that the base can't change (I realize
| that's a feature) and for a web server or database server that
| might not be ideal.
|
| [1] https://docs.freebsd.org/en/articles/nanobsd/
| 1MachineElf wrote:
| You may be asking for something different, but FreeBSD Jails
| can be extremely small, even down to just a single
| process[0][1].
|
| [0] https://docs.freebsd.org/en/books/handbook/jails/
|
| [1]
| https://gist.github.com/hiway/2b526fc64748e8d6e9f36f289003f8...
| drewg123 wrote:
| If you're building from source, then I'd just disable what you
| don't need via src.conf(5)'s various WITHOUT_FOO settings. They
| are described in the man page itself.
| 0mp wrote:
| This may not be the answer you are looking for, but OccamBSD
| seems to be a way to produce a minimal image for use in FreeBSD
| jails, FreeBSD bhyve and Xen:
| https://github.com/michaeldexter/occambsd
| sebcat wrote:
| I did this a while ago. the .iso.xz came in at 22.1 MB and the
| .iso at ~80MB.
|
| That's for a ro image with tmpmfs and varmfs[0], a minimal
| kernel, base and the packages nginx-lite, jansson, re2, curl,
| acme.sh and some services.
|
| The system boots from an ISO into running nginx and hosting a
| basic network scanner[1] at a VPS provider.
|
| I basically built from source with a custom SRCCONF[2],
| KERNCONF[3] and some other cleanup[4].
|
| There may be easier ways to do it but it worked out pretty well
| for me.
|
| [0] https://www.freebsd.org/cgi/man.cgi?rc.conf(5) [1]
| https://disco1.sajber.se/ [2]
| https://github.com/sebcat/yans/blob/master/tools/freebsd/vm/...
| [3]
| https://github.com/sebcat/yans/blob/master/tools/freebsd/vm/...
| [4]
| https://github.com/sebcat/yans/blob/master/tools/freebsd/vm/...
| arresthimnow wrote:
| NIH admits Fauci lied to congress and _FUNDED COVID-19_
|
| https://www.zerohedge.com/markets/fauci-lied-knowingly-willf...
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