The issue I had with slow #cargo builds seems to have been because of a disk... - Rustlang

tripplehelix, 2 months ago (edited 2 months ago)

The issue I had with slow #cargo builds seems to have been because of a disk caching issue. I simply ran;
sudo /sbin/sysctl -w vm.drop_caches=3
and now everything's fine!

OK ClamAV On Access Scanning was also to blame, it was set to scan /tmp and /var/tmp which explains why dumping the cache helped. For some reason, a package was having problems getting past ClamAV.

#rust

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mmstick, 2 months ago

@tripplehelix You may have better default behavior with these sysctl settings

vm.dirty_bytes = 268435456
vm.dirty_background_bytes = 134217728

Using zram can boost performance significantly when rustc is pushing cache to the limits, which you can further improve by setting these

vm.page-cluster=0
vm.swappiness=180
vm.watermark_boost_factor = 0
vm.watermark_scale_factor = 125

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tripplehelix, 2 months ago

@mmstick I think I'm going to setup zram again, didn't think I'd need it with 16GB.

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