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ygg-verify: 8 slots at 6 GiB each

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Measured 2026-09-30 00:17 CEST: 40% CPU idle, 53 of 62 GiB available,
~20 jobs queued, running jobs ~1 GiB each. 8 x 6 GiB worst case still
leaves the services their memory.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Meta Vens 2026-09-30 00:18:51 +02:00
commit a49b0943c1
1 changed files with 8 additions and 6 deletions
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14
tools/stopgap/ygg-verify.sh
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@ -26,11 +26,13 @@
#
# At most $SLOTS jobs run at once on Yggdrasil. The operator raised this to 3 on
# 2026-09-22 ("the other cores are mostly sitting idle") and asked on 2026-09-30
# for Yggdrasil to be "absolutely pinned", so it is 5. Each job is capped at 4
# CPUs and 8 GiB (MEM overrides per job). The CPU caps oversubscribe the 16
# cores on purpose: jobs run at nice 10, so the live services still win the
# scheduler. Memory is the real ceiling: 5 x 8 GiB leaves the services their
# ~17 GiB of the 62.
# for Yggdrasil to be "absolutely pinned", so it went to 5. Measured the same
# night: 40% CPU idle and 53 of 62 GiB available with ~20 jobs queued, running
# jobs using ~1 GiB each. So it is 8, each capped at 4 CPUs and 6 GiB (MEM
# overrides per job; a big link can ask for more). The CPU caps oversubscribe
# the 16 cores on purpose: jobs run at nice 10, so the live services still win
# the scheduler. Memory is the real ceiling: 8 x 6 GiB worst case leaves the
# services (~9 GiB resident) their share of the 62.
#
# A job whose container sits under $5% of one core for $IDLE seconds
# (default 900) is killed and comes back red: on 2026-09-30 three hung test
@ -74,7 +76,7 @@
set -euo pipefail
repo=${1:?local repo}; rev=${2:?revision}; image=${3:?image}; cmd=${4:?command}
host=${YGG_HOST:-ygg}; cpus=${CPUS:-4}; mem=${MEM:-8g}; slots=${SLOTS:-5}
host=${YGG_HOST:-ygg}; cpus=${CPUS:-4}; mem=${MEM:-6g}; slots=${SLOTS:-8}
timeout_s=${TIMEOUT:-3600}; idle_s=${IDLE:-900}
docker_args=${DOCKER_ARGS:-}
here=$(cd "$(dirname "$0")" && pwd)