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Generates JetBrains IDE VM options for version-specific GC selection and memory/performance tuning (JDK 17/21, IDE 222+). Useful for IDE freezes, slow indexing, and OOM errors.
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Generate `.vmoptions` configurations for JetBrains IDEs. Output as Markdown code blocks (one option per line, `#` comments). Do not generate files directly.
Provides IntelliJ Platform SDK knowledge for writing, debugging, and migrating JetBrains IDE plugins — covers plugin.xml, services, actions, PSI/VFS, threading, custom languages, code insight, Kotlin UI DSL v2, tool windows, run configs, Gradle plugin, dynamic reload, verifier, signing, and Marketplace publishing.
Provides safety rules, workflows, and tool reference for debugging Java applications via IntelliJ debugger: breakpoints, stepping, expression evaluation, and runtime state inspection.
Provides expert guidance on Java 21+ features (virtual threads, pattern matching), Spring Boot 3.x, GraalVM, and cloud-native enterprise patterns.
Share bugs, ideas, or general feedback.
Generate .vmoptions configurations for JetBrains IDEs. Output as Markdown code blocks (one option per line, # comments). Do not generate files directly.
Read prerequisite-check.md for validation logic. IDE version determines the JDK (17 vs 21), which controls which GC collectors and flags are available. Never skip this step — wrong version means wrong recommendations.
Match the user's problem to a tuning strategy:
| User says | Primary goal | Start with |
|---|---|---|
| "freezes", "hangs", "lag", "UI stutter" | Low GC pause times | gc-options.md → ZGC/Shenandoah |
| "slow indexing", "build is slow" | Throughput | gc-options.md → G1GC/Parallel |
| "out of memory", "OOM", "large project" | Memory capacity | memory-options.md → heap sizing |
| "startup is slow" | Fast startup | common-options.md → tiered compilation |
| "general tuning", "optimize" | Balanced | All references as needed |
Read only the relevant reference files. Each reference includes flag descriptions, defaults, usage notes, and example configurations.
| File | Content | Read when |
|---|---|---|
| prerequisite-check.md | IDE version validation, JDK mapping | Always (step 1) |
| gc-options.md | GC selection and tuning flags | GC-related goals |
| memory-options.md | Heap, code cache, metaspace, large pages | Memory-related goals |
| common-options.md | Compiler, strings, diagnostics, threads | Performance/startup goals |
Show the final .vmoptions block with:
# JetBrains IDE VM Options
# IntelliJ IDEA 2024.3 (version 243, JDK 21)
# Memory
-Xms2g
-Xmx4g
# Garbage Collector: Generational ZGC
-XX:+UseZGC
-XX:+ZGenerational
# Performance
-XX:ReservedCodeCacheSize=512m
-XX:+UseStringDeduplication
-XX:SoftRefLRUPolicyMSPerMB=50
# Diagnostics
-XX:+HeapDumpOnOutOfMemoryError
-XX:CICompilerCount=2