From 9d87ce605f1cd1e5df8ec8d729d01ddd91824bfd Mon Sep 17 00:00:00 2001
From: Viktor Barzin <viktorbarzin@meta.com>
Date: Wed, 18 Mar 2026 21:44:14 +0000
Subject: [PATCH] =?UTF-8?q?revert=20prometheus=20memory=203Gi=E2=86=924Gi:?=
 =?UTF-8?q?=20WAL=20tmpfs=20shares=20cgroup=20limit?=
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The 2Gi WAL tmpfs (medium: Memory) counts against the container's
memory limit. At 3Gi, Prometheus OOM-kills during WAL replay on
startup (heap + tmpfs > 3Gi). Reverting to 4Gi restores headroom.
---
 .../monitoring/modules/monitoring/prometheus_chart_values.tpl | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/stacks/monitoring/modules/monitoring/prometheus_chart_values.tpl b/stacks/monitoring/modules/monitoring/prometheus_chart_values.tpl
index 8dcda717..c4d5070b 100755
--- a/stacks/monitoring/modules/monitoring/prometheus_chart_values.tpl
+++ b/stacks/monitoring/modules/monitoring/prometheus_chart_values.tpl
@@ -161,9 +161,9 @@ server:
   resources:
     requests:
       cpu: 100m
-      memory: 3Gi
+      memory: 4Gi
     limits:
-      memory: 3Gi
+      memory: 4Gi
   livenessProbeInitialDelay: 300
   readinessProbeInitialDelay: 60
   strategy: