From 258cccbdcf26fc8a288ca398c26e06278e9e6132 Mon Sep 17 00:00:00 2001
From: Frank <frank@dankware>
Date: Sat, 12 Sep 2026 19:34:56 -0700
Subject: [PATCH] Revert "frank-large: EXPERIMENT - raise HALOGEN_MAX_TOK to
 65536"

This reverts commit 6851940b4d323d4b9acbef7bdb35cfde243403f1.
---
 .../frank-large/quadlet/frank-large.container | 25 ++++++++-----------
 1 file changed, 11 insertions(+), 14 deletions(-)

diff --git a/dankclaw/frank-large/quadlet/frank-large.container b/dankclaw/frank-large/quadlet/frank-large.container
index 931dd29..7aed5bb 100644
--- a/dankclaw/frank-large/quadlet/frank-large.container
+++ b/dankclaw/frank-large/quadlet/frank-large.container
@@ -104,20 +104,17 @@ Environment=HALOGEN_CTX=262144
 # used to contend for one 262k pool.
 Environment=HALOGEN_KV_POOL_POSITIONS=524288
 Environment=HALOGEN_KV_SLOTS=4
-# EXPERIMENT 2026-09-12 (operator call): raised to 65536 to measure what the
-# arena actually costs, against upstream's warning that it "sizes a ~4 GB
-# scratch arena, so do not raise it to the native context".
-#
-# Background on why this line matters at all. The device budget here is
-# 121 GiB - 67.7 resident weights - 24.0 reserved for the n-gram page cache
-# and the OS = 29.5 GiB, and that ONE budget carries both the KV pool and the
-# prefill arena. Measured arena-side cost ("everything but the pool"):
-#   max_tok 16384 -> 12.2 GiB   (524288 pool fits: 26.6 total)
-#   max_tok 32768 -> 20.6 GiB   (524288 pool REFUSED at 35.0, fit lowers to 262144)
-# HALOGEN_KV_POOL_FIT only ever LOWERS, never raises, and never below
-# HALOGEN_CTX — and the deploy still reports healthy either way, so the pool
-# you asked for is not necessarily the pool you got. Read the `kv pool:` lines.
-Environment=HALOGEN_MAX_TOK=65536
+# LOAD-BEARING. This line is what makes the doubling above real; do not
+# "clean it up". The device budget here is 121 GiB - 67.7 resident weights
+# - 24.0 reserved for the n-gram page cache and the OS = 29.5 GiB, and that
+# one budget carries BOTH the KV pool and the prefill arena. At the upstream
+# HALOGEN_MAX_TOK=32768 the arena is ~20.6 GiB, so 524288 positions need
+# 35.0 GiB against 29.5 available and HALOGEN_KV_POOL_FIT silently lowers
+# the pool back to 262144 — the deploy still reports healthy, so the
+# regression is invisible unless you read the ledger. Halving the arena to
+# ~10.5 GiB brings the 524288 need to ~24.9 GiB, which fits with ~3 GiB
+# of margin, at about 8-9% of prefill throughput.
+Environment=HALOGEN_MAX_TOK=16384
 # RAM left for the n-gram table the engine reads through the page cache.
 # Above the vendor's 20 because a dozen containers share this host; too low
 # and long prompts crawl with the disk busy.