💬 HeapTalk

HeapTalk is a proof-of-concept utility created to check if it is possible to “chat” with JVM heap dumps by means of LLMs. Seems like it is.

The utility lets you ask questions about heap dump data in human language by translating them into SQL queries for execution with MAT Calcite SQL Plugin.

Usage example

First, download the executable distribution from Releases page. Then make sure you have Java 21 installed.

./bin/heap-talk --api-key=demo dumps/petclinic.hprof \
  org.springframework.samples.petclinic.model \
  "What's the phone number of the person whose hamster named Basil?"

By default, the output contains only the generated SQL:

SELECT o.telephone 
FROM "org.springframework.samples.petclinic.model.Owner" AS o 
JOIN "org.springframework.samples.petclinic.model.Pet" AS p ON o.this = p.owner 
WHERE toString(p.name) = 'Basil'

, but you may like to see more details (including generated DDL statements) by adding --verbose option.

See more examples on this page (in Russian only so far).

Feedback

You’re welcome to leave comments, submit issues and create PRs if you find this tools interesting.