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authentik: raise CNPG postgres memory to stop replica OOMKills #300

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benvin merged 1 commits from benvin/authentik-pg-memory into main 2026-07-28 18:16:32 +10:00
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unkinben commented 2026-07-28 18:13:27 +10:00
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Authentik's intermittent API 500s (which failed two terraform-authentik CI runs today) were traced to its CNPG postgres replicas being OOMKilled: 512Mi limits leave no headroom over shared_buffers 128MB + max_connections 200, both OOM events matched the 500 bursts to the second, and the session-pinned RO pooler turns each replica death into a batch of severed read connections. The primary is at 84% of its limit and is next.

  • raise the authentik CNPG memory limit from 512Mi to 1Gi and request from 256Mi to 512Mi

Follow-up candidates (not in this PR): RO pooler poolMode session→transaction to shrink the blast radius of a replica loss; revisit max_connections/shared_buffers sizing.

Authentik's intermittent API 500s (which failed two terraform-authentik CI runs today) were traced to its CNPG postgres replicas being OOMKilled: 512Mi limits leave no headroom over shared_buffers 128MB + max_connections 200, both OOM events matched the 500 bursts to the second, and the session-pinned RO pooler turns each replica death into a batch of severed read connections. The primary is at 84% of its limit and is next. - raise the authentik CNPG memory limit from 512Mi to 1Gi and request from 256Mi to 512Mi Follow-up candidates (not in this PR): RO pooler poolMode session→transaction to shrink the blast radius of a replica loss; revisit max_connections/shared_buffers sizing.
unkinben added 1 commit 2026-07-28 18:13:27 +10:00
authentik: raise CNPG postgres memory to stop replica OOMKills
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Claude-Session: https://claude.ai/code/session_015ur3i7D2azsMAWTSVABApv
benvin merged commit e6f2cbc363 into main 2026-07-28 18:16:32 +10:00
benvin deleted branch benvin/authentik-pg-memory 2026-07-28 18:16:32 +10:00
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Reference: unkin/argocd-apps#300
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