Monitoring and Logging in Neo4j
Learn how to monitor a running Neo4j instance, read its logs, and track query and resource metrics for healthy administration.
Monitoring and Logging in Neo4j is a free Neo4j Graph Database Fundamentals lesson on CoddyKit — lesson 4 of 4. You can read the complete lesson below for free — then practise it hands-on in the browser with a built-in code editor and a 24/7 AI tutor. It is part of the Neo4j Graph Database Fundamentals learning path, one of 4 lessons in the course, and your progress syncs across the web and the CoddyKit app.
Why Monitoring Matters
A production graph database must stay healthy. Monitoring tells you about slow queries, memory pressure, and failed transactions before users notice.
Neo4j Log Files
Neo4j writes several logs in the logs/ directory:
neo4j.log— general outputdebug.log— detailed diagnosticsquery.log— executed queries
Enabling Query Logging
Turn on query logging in neo4j.conf to capture every query and its duration. This is invaluable for spotting slow patterns.
dbms.logs.query.enabled=INFO
dbms.logs.query.threshold=1s
dbms.logs.query.parameter_logging_enabled=trueListing Running Queries
Use SHOW TRANSACTIONS to see what is executing right now, including how long each has been running.
SHOW TRANSACTIONS
YIELD transactionId, currentQuery, elapsedTime
RETURN transactionId, currentQuery, elapsedTime;Killing a Stuck Query
If a query runs away, terminate it by its transaction id to free resources.
TERMINATE TRANSACTIONS 'neo4j-transaction-123';Database Metrics
Neo4j exposes metrics like transaction rate, page cache hit ratio, and heap usage. These can be exported to monitoring systems.
- Page cache hit ratio should stay high
- Watch heap and GC pauses
Exporting to Prometheus
Enable the Prometheus endpoint in config so external dashboards (like Grafana) can scrape Neo4j metrics.
metrics.prometheus.enabled=true
metrics.prometheus.endpoint=localhost:2004Inspecting Store Sizes
Track how large your stores grow. SHOW DATABASES and store files reveal node, relationship, and property counts over time.
MATCH (n) RETURN count(n) AS nodeCount;
MATCH ()-[r]->() RETURN count(r) AS relCount;Page Cache Tuning
The page cache keeps graph data in memory. If your dataset fits in cache, reads are very fast. Monitor the hit ratio to size it correctly.
dbms.memory.pagecache.size=4gAlerting on Problems
Set alerts for: low cache hit ratio, long GC pauses, sustained high transaction failures, and disk filling up. Catch issues early.
Routine Health Checks
A healthy admin routine: review query.log weekly, watch metrics dashboards daily, and verify backups regularly.
Quick Check
Test your monitoring knowledge.
Recap
You learned to monitor Neo4j:
- Read neo4j.log, debug.log, and query.log
- Enable query logging with thresholds
- Inspect and terminate transactions
- Export metrics to Prometheus/Grafana
- Tune and watch the page cache
Frequently asked questions
Is the “Monitoring and Logging in Neo4j” lesson free?
Yes — the full text of “Monitoring and Logging in Neo4j” is free to read here on the web, and the Neo4j Graph Database Fundamentals course includes 4 lessons in total. To practise it interactively (a built-in code editor and a 24/7 AI tutor) and unlock the rest of the Neo4j Graph Database Fundamentals course, upgrade to CoddyKit PRO.
What will I learn in “Monitoring and Logging in Neo4j”?
Learn how to monitor a running Neo4j instance, read its logs, and track query and resource metrics for healthy administration. You practise Neo4j Graph Database Fundamentals with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.
Do I need any experience to start Neo4j Graph Database Fundamentals?
No prior experience is required. Neo4j Graph Database Fundamentals on CoddyKit is structured for beginners through advanced learners; this is — lesson 4 of 4, so you can start here or from the beginning and move at your own pace.
How long does the “Monitoring and Logging in Neo4j” lesson take?
Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.
Can I write and run code in this Neo4j Graph Database Fundamentals lesson?
Yes. Every Neo4j Graph Database Fundamentals lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.
All lessons in this course
- Neo4j Browser and Admin Tools
- Importing and Exporting Data
- Backup and Restore Strategies
- Monitoring and Logging in Neo4j