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production-heap-dump.jfr — AI Analysis

HIGH

High CPU usage driven by org.hibernate.engine.internal.StatefulPersistenceContext — excessive object allocation in tight query loop suggesting N+1 query pattern.

Evidence

847 CPU samples in hibernate session management (39% of total)

ObjectAllocation hotspot: StatefulPersistenceContext at 2.3 GB/min

G1GC pauses averaging 180ms — consistent with allocation pressure

Recommendations

Add @BatchSize or JOIN FETCH to resolve N+1 queries

Enable second-level cache for frequently read entities

From file to fix in seconds

No instrumentation. No agents. No vendor lock-in.

Upload your file

Drop in a thread dump (.txt), JFR recording (.jfr), or GC log (.log). No setup, no agents.

AI analyses the runtime

Lumino parses the file, extracts CPU hotspots, thread states, GC events, and sends the data to Claude for diagnosis.

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Receive a severity-rated diagnosis with specific evidence and actionable recommendations you can act on immediately.

Every JVM diagnostic format, covered

Lumino understands the internals of each format and extracts what matters.

Thread Dumps

.txt / .tdump

Deadlock detection
Thread pool starvation
Blocked thread chains
Lock contention analysis
Daemon vs non-daemon breakdown

JFR Recordings

.jfr

CPU flame graph (top hotspots)
Memory allocation hotspots
GC pause timeline
Object allocation by class
Execution sample analysis

GC Logs

.log / .gc.log

Pause time distribution
GC throughput %
Algorithm detection (G1, ZGC, Shenandoah)
Heap sizing recommendations
Long pause identification

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10 analyses / month
Thread dump, JFR, GC log
7-day report history
AI root cause reports
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$29/ month

Unlimited analyses
Thread dump, JFR, GC log
1-year report history
Priority AI processing
Heap dump analysis
CLI access (lumino CLI)

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