Local: raise LMCache shm_size 32→64 for LMCACHE_L1_GB=60 (124 GB rig)

Rig-specific tuning — this rig has 124 GB RAM (110 free), so L1=60
clears the preflight gate (L1+28=88) with headroom. shm_size must be
>= L1 or the MP connector falls back to slow pickle.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

models/qwen3.6-27b/vllm-lmcache/compose/dual/fp8/lmcache.yml

@@ -87,7 +87,7 @@ services:
     # incident). Raise these AND shm_size + LMCACHE_L1_GB together for a bigger cache.
     mem_limit: ${CLUB3090_MEM_LIMIT:-70g}
     memswap_limit: ${CLUB3090_MEM_LIMIT:-70g}
-    shm_size: "32gb"   # MUST be >= LMCACHE_L1_GB (default 30). Raise if you raise the cache.
+    shm_size: "64gb"   # MUST be >= LMCACHE_L1_GB. Raised 32→64 for LMCACHE_L1_GB=60 (this rig, 124 GB RAM).
     ipc: host
     volumes:
       - ${MODEL_DIR:-../../../../../../models-cache}:/root/.cache/huggingface