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Date:      Wed, 19 Sep 2018 12:14:49 +0000
From:      Lorenzo Salvadore <phascolarctos@protonmail.ch>
To:        FreeBSD <freebsd-questions@freebsd.org>
Subject:   Re: error message with poudriere
Message-ID:  <AYVHRHPsISiOEIgpj7Avc0N9axdAQ3YeUhFC3ybFnOVFrKBXoVsDWJNQO8v-QdggxYksIrRFLgPdJFkuEP5fH-IEJpjUgwDfB3ei37WGgSQ=@protonmail.ch>
In-Reply-To: <20180919074745.000015d6@aim.com>
References:  <20180919054924.00006e7f@aim.com> <H0ycS5ZvnYkv7HIfn_5ZRp_-JzwhmypKT0DavDZKHu2CDFmy0Cg18gCWBAi8b8v1q2k2ZbKxNlkS8WKFcaCHI6Vh4zyaGYSJ1WTzK2BUJf8=@protonmail.ch> <20180919074745.000015d6@aim.com>

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> > > Running the devel/poudriere version of poudriere on a freebsd 11.2 am=
d64
> > > machine, I am often presented with this message:
> > > +swap_pager_getswapspace(18): failed
> > > The number in parentheses changes, but the message stays the same. Th=
e
> > > message is printed literally hundreds of times.
> > > Exactly what does it mean, and what do I do to correct it? I cannot f=
ind
> > > anything in the poudriere documentation that mentions it.
> >
> > I think the error means that you used all of you RAM and your swap spac=
e.
> > If I am right, then you need to add either more RAM or more swap space
> > (easiest would probably be to create a swap file), unless there is a bu=
g in
> > ports-mgmt/poudriere-devel (for example a memory allocation in an infin=
ite
> > loop).
> > I am sure you will soon get help from persons much more capable than me=
,
> > but while you wait I suggest you tell how much RAM and swap space do yo=
u
> > have, what are you trying to do with poudriere, if the problem arises w=
ith
> > ports-mgmt/poudriere too and send the output of the following two comma=
nds:
> >
> > -   swapinfo
> > -   sysctl vm.vmtotal
> >
> > The nearer you execute them to the the moment when the error is produce=
d,
> > the better it is.
> > Lorenzo Salvadore.
>
> After a fresh reboot, this is the output:
>
> ~ # swapinfo
> Device 1K-blocks Used Avail Capacity
> /dev/ada0p2 2097152 0 2097152 0%
> ~ #
> ~ # sysctl vm.vmtotal
> vm.vmtotal:
> System wide totals computed every five seconds: (values in kilobytes)
>
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D
>
> Processes: (RUNQ: 1 Disk Wait: 0 Page Wait: 0 Sleep: 119)
> Virtual Memory: (Total: 4542784K Active: 4498692K)
> Real Memory: (Total: 1662988K Active: 1656464K)
> Shared Virtual Memory: (Total: 130504K Active: 96116K)
> Shared Real Memory: (Total: 44132K Active: 37808K)
> Free Memory: 794124K
>
> I was reading about a "PQ_LAUNDRY" variable/setting that pertains to Free=
BSD
> 11.x that is supposed to have some affect on this. I cannot find out much
> information about it though or how to set it.

I do not know about PQ_LAUNDRY (as I said, there is people much more skille=
d than me),
however I would suggest you to first exclude simpler solutions, if you have=
 not done it
yet.

The simplest solution is to consider the possibilty that your 4GB of RAM an=
d 2GB of swap
(if I have interpreted the data correctly) get full during your use of poud=
riere: does that
looks likely to you?

If this is indeed the problem, then you should increase swap space. You can=
 do it
by following these instructions:
https://www.freebsd.org/doc/handbook/adding-swap-space.html

If you are unsure that this is the problem, it might be better to first tes=
t the solution
by choosing to add swap through a swapfile (it is in the above documentatio=
n link).
Once tested, if this fixes your problem, then you might decide to use an ha=
rd drive
or a partion instead.

Be prepared to have your system running slow: swap gives you more memory, b=
ut
reduces your computations speed.

Lorenzo Salvadore.



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