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  Thread: OOM_Reaper and crashes

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OOM_Reaper and crashes
One of my computers (probably the smallest one) has been locking up lately. What seems to be happening is that the Out Of Memory Reaper is doing something, and this something typically ends up being a wcgrid job.

# grep oom_reaper /var/log/messages.1
May 16 07:06:12 alyce2 kernel: [412747.776556] oom_reaper: reaped process 28712 (wcgrid_mip1_ros), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB
May 16 07:50:11 alyce2 kernel: [415388.191132] oom_reaper: reaped process 23830 (wcgrid_mcm1_map), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB
May 16 08:28:49 alyce2 kernel: [417691.475802] oom_reaper: reaped process 30557 (wcgrid_mcm1_map), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB
May 17 00:02:35 alyce2 kernel: [54407.355921] oom_reaper: reaped process 14674 (wcgrid_mip1_ros), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB
May 17 04:46:31 alyce2 kernel: [71439.913062] oom_reaper: reaped process 17771 (wcgrid_mip1_ros), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB
May 19 04:20:52 alyce2 kernel: [74003.686308] oom_reaper: reaped process 14109 (wcgrid_mip1_ros), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB

# grep oom_reaper /var/log/messages
May 19 22:38:20 alyce2 kernel: [55298.624995] oom_reaper: reaped process 2846 (wcgrid_mip1_ros), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB
May 19 22:38:51 alyce2 kernel: [55328.880941] oom_reaper: reaped process 2824 (wcgrid_mip1_ros), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB
May 20 02:00:33 alyce2 kernel: [67428.497295] oom_reaper: reaped process 11756 (wcgrid_zika_vin), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB
May 20 03:59:20 alyce2 kernel: [74552.733917] oom_reaper: reaped process 12372 (wcgrid_zika_vin), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB
May 20 05:44:07 alyce2 kernel: [80840.166361] oom_reaper: reaped process 11399 (wcgrid_zika_vin), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB

I later stumble across the computer, and find the NIC and console is unresponsive, which means the power button is the only way to get things going again.

OS is Devuan Linux Ascii

# uname -a
Linux alyce2 4.19.0-5-amd64 #1 SMP Debian 4.19.37-3 (2019-05-15) x86_64 GNU/Linux
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Re: OOM_Reaper and crashes
Limit BOINC's maximum memory allowance in the local or website settings. As soon as the total is reached the client is supposed to pause a task with the "waiting for memory" message.
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Re: OOM_Reaper and crashes
The limits were set to 60 and 90%. I lowered them to 50 and 80%. I didn't touch the swap allocation.
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