Re: poudriere-devel and tmpfs use by inactive builders: an example

On 4/30/26 02:43, Tatsuki Makino wrote:
> Hello.
> 
> When jobid03 is running and jobid06 has finished its work and is on
> standby, the environment of jobid06 remains intact, which means that
> tmpfs continues to use memory.

True.

Builder process 06 may well have instead completed what it last built
before builder process 03 started building lang/rust (which is what it
was building in my example context). I did not check on such timing
relationships.

So there were 7 other builders using tmpfs to complete with the RAM+SWAP
usage for lang/rust while lang/rust was the only port-package that was
being built --7 builders that had finished and had nothing more to do
until lang/rust finished building. They used 13+ GiBytes of RAM+SWAP
while lang/rust was building by itself.

Such patterns contribute to systems being resource limited (RAM+SWAP)
for doing port-package builds.

The system in question has 32 GiBytes of RAM. 13 GiBytes is more than
1/3rd of the available RAM's size.

> When looking inside /usr/local/poudriere/data/.m/main-CA76-default/06/
> var/db/pkg/local.sqlite, all the packages installed as dependencies of
> the last built port remain installed, and if llvm19 are installed, it
> seems to consume as much as 2GB.

Such was still installed under .../06/usr/local/ . The df -m showed 1693
MiBytes in use in that tmpfs instance. (I did not look at the content of
local.sqlite myself.)

> 
> ...isn't it right?

It is a further description of what I was reporting.

> 
> Regards.
> 
> On 2026/04/30 12:22, Mark Millard wrote:
>> # poudriere version
>> poudriere-git-3.4.99.20260425
>>
>> The following is an extraction of tmpfs lines from a df -m ouptput in a
>> UFS system context. The only active builder was 03 . All other future
>> builders were waiting for 03 to finish because they were dependent on
>> 03's results.
>>
>> 1M-
>> blocks   Used  Avail Capacity  Mounted on
>> 131780   2329 129451     2%
>> /usr/local/poudriere/data/.m/main-CA76-default/03
>> 131442   1991 129451     2%
>> /usr/local/poudriere/data/.m/main-CA76-default/03/usr/local
>> 131334   1883 129451     1%
>> /usr/local/poudriere/data/.m/main-CA76-default/06/usr/local
>> 131144   1693 129451     1%
> 
> (omit)(omit)
> 
>> The total of the non-03 tmpfs space used: 1991+. . .+97 == 14184
>> So: approx.= 13.85 GiBy†es.
>>
>>
> 
> 
> 


-- 
===
Mark Millard
marklmi at yahoo.com