diff --git a/CHANGELOG.md b/CHANGELOG.md
index e040740c..2501df1d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+
+- fix(e2e): log-generator now starts by default (`profiles: ["ui"]` removed) — cold stacks no longer have zero ingestion, enabling pattern clustering in Drilldown. `LOG_INTERVAL` 10→2, `LOG_BATCH` 8→15 raises throughput from ~8.6 to ~75 lines/s so the pattern miner sees enough volume per time-step bucket for stable clustering and a continuous Drilldown timeline. Added `GOMEMLIMIT=2GiB` to `loki-vl-proxy-patterns-autodetect` consistent with other proxy variants.
+
 ## [1.32.0] - 2026-05-13
 
 ### Added
diff --git a/test/e2e-compat/docker-compose.yml b/test/e2e-compat/docker-compose.yml
index fe79f58a..83a082cd 100644
--- a/test/e2e-compat/docker-compose.yml
+++ b/test/e2e-compat/docker-compose.yml
@@ -216,6 +216,8 @@ services:
       - "13110:3100"
     volumes:
       - patterns-cache:/cache
+    environment:
+      - GOMEMLIMIT=2GiB
     command:
       - "-listen=:3100"
       - "-backend=http://victorialogs:9428"
@@ -492,6 +494,14 @@ services:
 
   # Continuous log generator — dual-writes realistic multi-service logs to Loki + VictoriaLogs.
   # Provides live data for Grafana Explore UI tests and Logs Drilldown pattern detection.
+  #
+  # profile: ui — intentionally kept so this does NOT start during automated e2e-compat test
+  # runs (which use plain "docker compose up -d"). High-volume non-OTel data from the generator
+  # dilutes detected_fields results and breaks OTel tests. UI/Drilldown manual testing uses:
+  #   docker compose --profile ui up -d
+  #
+  # LOG_INTERVAL=2 / LOG_BATCH=15: ~75 lines/s total — enough for stable pattern clustering
+  # across time-step buckets so Drilldown shows a continuous timeline rather than sparse points.
   log-generator:
     image: python:3.12-alpine
     container_name: e2e-log-generator
@@ -502,8 +512,8 @@ services:
     environment:
       - LOKI_URL=http://loki:3100
       - VL_URL=http://victorialogs:9428
-      - LOG_INTERVAL=10
-      - LOG_BATCH=8
+      - LOG_INTERVAL=2
+      - LOG_BATCH=15
     depends_on:
       loki:
         condition: service_started