Configure G1 garbage collector to free memory more frequently

[rob93c]

Summary by CodeRabbit

• Performance
  • Updated the default JVM settings to configure heap sizing and G1 garbage collection. These settings affect how the application allocates memory and manages garbage collection while running.

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No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

• Configuration used: Repository UI
• Review profile: CHILL
• Plan: Advanced
• Run ID: 477459f8-84be-4e36-9082-1fae7b7a36dd

📥 Commits

Reviewing files that changed from the base of the PR and between c9386fd and a76c277.

📒 Files selected for processing (1)

• build.gradle.kts

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📝 Walkthrough

Walkthrough

The build configuration reformats the jlink options without changing their values. It adds heap sizing and G1 garbage-collection settings to applicationDefaultJvmArgs. The existing final-field-mutation argument remains.

Changes

Build configuration

Layer / File(s)	Summary
jlink and JVM options build.gradle.kts	The jlink options are reformatted across multiple lines. applicationDefaultJvmArgs adds a 64 MB initial heap, a 320 MB maximum heap, G1 periodic-GC and heap-shrinking settings. The existing final-field-mutation argument remains.

Priority: ⬇️ Low

Merge Risk: ⚪ Minimal · up to a76c2

The packaged application receives the new settings, and the bundled runtime documents the added options. The cap’s suitability for peak conversion workloads is not established, but no concrete failure is shown; no actionable merge-blocking risk remains.

Security Architecture Review

Security architecture risk: 🔵 Low · up to a76c2

The change does not demonstrate expanded privileges or a new access path. However, the fixed heap budget has not been validated against concurrent media processing or recovery from memory exhaustion, so availability risk remains uncertain.

Retained concerns
No architecture-level concerns identified.

Security review details

Security Blast Radius

• inferred — Memory pressure is shared by requests processed in the same bot JVM. The supported potential impact is availability for chats served by that instance; no evidence establishes increased authority or propagation into other services or data stores.

Security Findings and Attack Paths

• observed — The existing gzip-media path expands content with readAllBytes before checking animation compliance and compressed file size. This allocation pattern predates the PR. Its exposure is unchanged, and the unknown effective base heap budget prevents establishing that the new ceiling worsens its exhaustion threshold.

Trust Boundaries and Controls

• observed — The existing file gate rejects unsupported files and files whose reported size exceeds 20,000,000 bytes. That per-file control does not bound aggregate concurrent allocation or decompressed content size.

Hardening Proposals

• proposed — Validate the chosen heap budget under concurrent large-media and compressed-media workloads, including exhaustion and recovery. Consider bounded admission and decompressed-size limits to contain resource use independently of heap tuning.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 1…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title clearly describes the main change: tuning the application’s G1 garbage collector to reclaim memory more frequently.

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