Game Ops Monitor — Real-Time Game Server Monitoring

Query game server JVM performance metrics from Scouter Collector. Supports batch querying of TPS, online users, and memory across thousands of game processes. Designed for large-scale game operations (7000+ processes across 900+ machines).

Overview

This skill provides a unified interface for game operations teams to monitor JVM-based game servers in real-time. It wraps the Scouter Collector's HTTP API and returns human-readable formatted output.

What it monitors:

• TPS (Transactions Per Second) — game server throughput
• Online Users — current active player count
• JVM Heap — memory usage and utilization percentage

Alert thresholds (configurable):

Scale: Tested with 7000+ game processes across 900+ physical machines. Single Collector (8-core 16GB) handles this with room to spare.

When to Use

Triggers (natural language / slash commands):

• "各服 TPS 怎么样" / "check all server TPS"
• "现在各服状态" / "game server status"
• "帮我看看在线人数" / "how many players online"
• "各服内存怎么样" / "check server memory"
• "哪几服 TPS 告警了" / "any TPS alerts"
• "生成今天各服性能报表" / "generate performance report"
• "帮我看看 xy_s11649 的状态" / "check server xy_s11649"
• /game-monitor (OpenClaw slash command)

Do NOT use for:

• OS-level monitoring (use Zabbix for server metrics)
• Game server restart operations (use game-ops-restart skill)
• Player data operations (use GM后台)
• Version deployment (use deployment skill)

Configuration

Set the following environment variables or configuration:

# Required — replace <collector-ip> with your Scouter Collector IP
export SCOUTER_COLLECTOR_URL=http://<collector-ip>:6188

# Optional (defaults shown)
SCOUTER_OBJ_TYPE=Java

# Alert thresholds
TPS_CRITICAL=100
TPS_WARNING=300
HEAP_CRITICAL=90
HEAP_WARNING=75

API Reference

Base URL

http://{SCOUTER_COLLECTOR_URL}/scouter/v1

Endpoints Used

Object Response Shape

[
  {
    "objHash": "abc123def456",
    "objName": "xy_s11649",
    "objType": "Java",
    "address": "192.168.1.100",
    "state": "ACTIVE"
  }
]

Counter Response Shape

{
  "objHash": "abc123def456",
  "counter": "tps",
  "value": 823000,
  "unit": "",
  "timestamp": 1714281600000
}

Note: TPS value is in micro-ticks. Divide by 1000 to get real TPS. Online user count (active) is returned as-is.

Workflows

Workflow 1: Batch Query All Servers

Input: "各服 TPS 怎么样"

Steps:

# 1. Health check
curl -s "http://${SCOUTER_COLLECTOR_URL}/scouter/v1/status"
# Expect: {"status":"ok"}

# 2. Get all Java objects (game servers)
curl -s "http://${SCOUTER_COLLECTOR_URL}/scouter/v1/objects?type=${SCOUTER_OBJ_TYPE}"

# 3. For each object, fetch metrics in parallel
#    ⚠️ objHash is from network; validate it is hex before use
objHash="<value-from-json>"
if ! echo "$objHash" | grep -qE '^[0-9a-fA-F]+$'; then
  echo "[WARN] objHash validation failed: $objHash — skipping"
  continue
fi
# TPS
curl -s "http://${SCOUTER_COLLECTOR_URL}/scouter/v1/object/${objHash}/counter/tps"
# Active users
curl -s "http://${SCOUTER_COLLECTOR_URL}/scouter/v1/object/${objHash}/counter/active"
# Heap
curl -s "http://${SCOUTER_COLLECTOR_URL}/scouter/v1/object/${objHash}/counter/heap/used"
curl -s "http://${SCOUTER_COLLECTOR_URL}/scouter/v1/object/${objHash}/counter/heap/max"

# 4. Parse and format output
# - TPS: value / 1000 (round to integer)
# - Heap %: (used / max) * 100
# - Sort by TPS ascending
# - Color code: 🔴 < 100, ⚠️ 100-300, ✅ > 300

Security note: The objHash field returned by the Collector is a hex string. The validation above rejects any value containing non-hex characters, preventing shell injection via a malicious or compromised Collector response.

Output:

========== Game Server Health ==========
Time: 2026-04-28 14:00
Total servers: 6,847

========== TPS Alerts ==========
🔴 Critical (<100 TPS):
  xy_s20133   89 TPS / 412 online / Heap 67%
  xy_s20132  156 TPS / 891 online / Heap 45%

⚠️ Warning (100-300 TPS):
  xy_s11647  287 TPS / 3,521 online / Heap 55%

✅ OK (>300 TPS): 6,812 servers

========== Memory Alerts ==========
🔴 Critical (Heap >90%):
  xy_s20140  Heap 95% (3.8G/4G)
  xy_s20141  Heap 92% (3.7G/4G)

Workflow 2: Single Server Query

Input: "帮我看看 xy_s11649 的状态"

Steps:

# 1. Find object hash by name
objHash=$(curl -s "http://${SCOUTER_COLLECTOR_URL}/scouter/v1/objects?type=${SCOUTER_OBJ_TYPE}" | \
  jq -r '.[] | select(.objName=="xy_s11649") | .objHash')

# ⚠️ Validate objHash is safe hex before using in curl URLs
if ! echo "$objHash" | grep -qE '^[0-9a-fA-F]+$'; then
  echo "[ERROR] objHash validation failed: $objHash"
  exit 1
fi

# 2. Fetch all metrics
tps=$(curl -s "http://${SCOUTER_COLLECTOR_URL}/scouter/v1/object/${objHash}/counter/tps" | \
  jq -r '.value / 1000 | floor')
active=$(curl -s "http://${SCOUTER_COLLECTOR_URL}/scouter/v1/object/${objHash}/counter/active" | \
  jq -r '.value')
heap_used=$(curl -s "http://${SCOUTER_COLLECTOR_URL}/scouter/v1/object/${objHash}/counter/heap/used" | \
  jq -r '.value')
heap_max=$(curl -s "http://${SCOUTER_COLLECTOR_URL}/scouter/v1/object/${objHash}/counter/heap/max" | \
  jq -r '.value')

# 3. Calculate heap percentage
heap_pct=$(echo "scale=1; ${heap_used} * 100 / ${heap_max}" | bc)
heap_used_gb=$(echo "scale=2; ${heap_used} / 1024 / 1024 / 1024" | bc)
heap_max_gb=$(echo "scale=2; ${heap_max} / 1024 / 1024 / 1024" | bc)

Output:

========== xy_s11649 Status ==========
TPS:       ✅ 823
Online:    2,847
Heap:      2.10G / 4.00G (52.5%) ✅
Status:    Normal

Workflow 3: Performance Report

Input: "生成今天各服性能报表"

Output:

========== Game Server Performance Report ==========
Date: 2026-04-28

一、Overview
Total servers: 6,847
Normal: 6,812 (99.5%)
Alerting: 35 (0.5%)

二、TPS Distribution
>1000 TPS:   1,234 servers (18%)
500-1000:    2,456 servers (36%)
300-500:     2,122 servers (31%)
100-300:     1,023 servers (15%)
<100 TPS:       12 servers (0.2%) ← action required

三、Memory Alerts
>90% Heap:   23 servers ← schedule restart
75-90% Heap: 87 servers ← monitor

四、Top 10 TPS
  xy_s11649  2,384 TPS / 2,847 online
  xy_s11650  2,201 TPS / 2,103 online
  ...

五、Top 10 Online
  xy_s11649  2,847 online / TPS 2,384
  xy_s11650  2,654 online / TPS 2,201
  ...

Workflow 4: Alert Detection Only

Input: "哪几服 TPS 告警了"

Output:

========== TPS Alerts ==========
Time: 2026-04-28 14:00

🔴 Critical (<100 TPS): 2 servers
  xy_s20133   89 TPS / 412 online
  xy_s20132  156 TPS / 891 online

⚠️ Warning (100-300 TPS): 1 server
  xy_s11647  287 TPS / 3,521 online

Query Dimension Detection

Auto-detect query scope from input:

Common Pitfalls

1. TPS value is 0 or static

   • Normal if server has no activity
   • Check: send a test player action, re-query
   • Cause: agent sampling rate may be 0

2. Server not appearing in results

   • Server not registered yet: wait 30s after startup
   • Wrong type parameter: try without type filter
   • Agent not loaded: check server start logs for Scouter

3. Collector API timeout

   • Too many objects: implement pagination or reduce query frequency
   • Collector overloaded: check memory/CPU, consider clustering

4. Online count mismatch

   • Scouter active counts active connections/threads, not unique players
   • If game has its own online counter, compare and calibrate

5. Heap percentage > 100%

   • heap/used can exceed heap/max during GC cycle
   • Normal behavior, not an error

Scouter Architecture

┌─────────────────────────────────────────────────────┐
│              Scouter Collector                       │
│              Port 6180 (TCP agent→collector)         │
│              Port 6188 (HTTP API)                    │
└─────────────┬─────────────┬─────────────┬───────────┘
              │             │             │
    ┌─────────┴───┐ ┌───────┴───┐ ┌───────┴───┐
    │ Physical A  │ │ Physical B │ │ Physical C │
    │ 8 processes │ │ 7 processes│ │ 8 processes│
    │ JavaAgent   │ │ JavaAgent  │ │ JavaAgent  │
    └─────────────┘ └───────────┘ └───────────┘

Components:

• Java Agent (-javaagent:scouter-agent.jar): loaded with game server process, collects JVM metrics
• Collector: receives metrics from agents, exposes HTTP API, stores data
• Web UI / Client: visualize data (optional; this skill uses HTTP API only)

Setup

1. Deploy Scouter Collector

# Download
wget https://github.com/scouter-project/scouter/releases/download/v2.10.0/scouter-all-2.10.0.tar.gz
tar -xzf scouter-all-2.10.0.tar.gz -C /opt/

# Start collector
cd /opt/scouter/server/
./startup.sh

# Verify
curl http://localhost:6188/scouter/v1/status
# {"status":"ok"}

2. Deploy Java Agent on Game Servers

Add to game server startup script (ServerMain.sh):

JAVA_OPTS="-Xms256M -Xmx${MAX_MEMORY}M \
  -javaagent:lib/scouter/scouter-agent.jar \
  -Dscouter.agent.objName=${serverId}"

Where serverId is the unique server identifier (e.g., xy_s11649).

3. Configure Collector Address in Agent

Create lib/scouter/scouter.conf:

scouter.server=<collector-ip>:6180
log_level=info

4. Verify Deployment

# From collector, check registered objects
curl http://<collector-ip>:6188/scouter/v1/objects?type=Java | jq length

# Should return number > 0 (count of game processes registered)

Integration with Alerting

To send alerts on critical thresholds, see game-alert skill. The alert skill:

• Runs as a cronjob every 5 minutes
• Queries all servers via this skill's API
• Sends notifications via Feishu/DingTalk webhook when thresholds exceeded
• Implements cooldown to avoid duplicate alerts

Attribution

• Scouter: Scouter Project (https://github.com/scouter-project/scouter) — JVM monitoring tool designed for game servers, widely used in Korean gaming industry
• Skill adaptation: Hermes Agent team

See Also

• game-alert — Alert notification workflow
• scouter-deploy — Deployment checklist and verification
• scouter-troubleshoot — Common issues and diagnosis
• scouter-tuning — Capacity planning and performance tuning