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On 2020-07-12 11:29+0300 Nikos Chantziaras <realnc@×××××.com> wrote: |
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> On 12/07/2020 09:04, William Kenworthy wrote: |
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> > Hi, |
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> > |
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> > is there a way to change the MAKEOPTS setting on a running |
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> > emerge? I am using "-j 5 -l 4" whilst emerging gcc-9.3 but its |
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> > creating too much pressure on memory. I expect the emerge to take |
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> > many more hours but complete eventually - but reducing it to "-j2" |
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> > will help other operations whilst not losing whats already been |
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> > completed (this is an old atom N330 with 4G ram and is my |
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> > gateway/router/firewall/snort/... and the overload is starting to |
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> > affect the network throughput significantly). |
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> |
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> […] |
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> ionice is in sys-apps/util-linux, so it's probably already installed. |
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> schedtool though is in sys-process/schedtool and it might not be |
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> installed. |
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> […] |
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The nice level can also be adjusted with `renice` from |
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sys-apps/util-linux: |
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renice -n 19 -p pid |
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> Another thing I recommend is getting rid of "-j5". Use -j4. The "+1" |
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> recommendation from decades ago does not apply anymore with modern |
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> Linux kernels. You can test this yourself by emerging a smaller |
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> package that takes like 2 minutes or so to emerge, and compare times |
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> with j4 and j5. Most likely you will see no difference, other than j5 |
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> using more RAM. |
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You can also set MAKEOPTS and other Portage variables per package, for |
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example: |
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echo 'MAKEOPTS="-j1"' >> /etc/portage/env/onejob.conf |
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echo 'sys-devel/gcc onejob.conf' >> /etc/portage/package.env/onejob |
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|
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See <https://wiki.gentoo.org/wiki//etc/portage/package.env> for more |
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information. |
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