After update to r357104 build of poudriere jail fails with 'out of swap space'

[Cy Schubert]

In message <20200125235405.GA50378 at troutmask.apl.washington.edu>, Steve 
Kargl w
rites:
> On Sat, Jan 25, 2020 at 03:31:16PM -0800, Steve Kargl wrote:
> > On Sat, Jan 25, 2020 at 02:09:29PM -0800, Cy Schubert wrote:
> > > On January 25, 2020 1:52:03 PM PST, Steve Kargl <sgk at troutmask.apl.washin
> gton.edu> wrote:
> > > >On Sat, Jan 25, 2020 at 01:41:16PM -0800, Cy Schubert wrote:
> > > >> 
> > > >> It's not just poudeiere. Standard port builds of chromium, rust
> > > >> and thunderbird also fail on my machines with less than 8 GB.
> > > >>
> > > >
> > > >Interesting.  I routinely build chromium, rust, firefox,
> > > >llvm and few other resource-hunger ports on a i386-freebsd
> > > >laptop with 3.4 GB available memory.  This is done with
> > > >chrome running with a few tabs swallowing a 1-1.5 GB of
> > > >memory.  No issues.  
> > > 
> > > Number of threads makes a difference too. How many core/threads does your
>  laptop have?
> > 
> > 2 cores.
> > 
> > > Reducing number of concurrent threads allowed my builds to complete
> > > on the 5 GB machine. My build machines have 4 cores, 1 thread per
> > > core. Reducing concurrent threads circumvented the issue. 
> > 
> > I use portmaster, and AFIACT, it uses 'make -j 2' for the build.
> > Laptop isn't doing too much, but an update and browsing.  It does
> > take a long time especially if building llvm is required.
> > 
>
> In thinking about this and recalling watching top(1) during
> my last firefox rebuild, it seems that the compiler can use
> 0.5-1 GB when compiling files.  I see how doing a parallel
> build with "-j NCPU" could stress a <4 GB system.

It stresses my 5 GB 4 core system whereas my 8 GB 4 core machine handles it 
quite nicely. 3 GB doesn't seem like a lot more but the extra 60% more RAM 
is a lot.


-- 
Cheers,
Cy Schubert <Cy.Schubert at cschubert.com>
FreeBSD UNIX:  <cy at FreeBSD.org>   Web:  http://www.FreeBSD.org

	The need of the many outweighs the greed of the few.