Memory profiling

Memory Insights

Start allocation tracing with the process:

MyGame.exe -trace=default,memory
MyGame.exe -trace=default,memory,metadata,assetmetadata

Use marked A/B timestamps to query allocations live at a point, retained across an action, freed during an interval, or monotonically growing across repetitions. Metadata improves asset/class attribution but increases trace volume. Late connect cannot reconstruct allocations made before tracing began.

Low-Level Memory Tracker

Launch with -LLM for tagged totals or -LLMCSV for periodic CSV under Saved/Profiling/LLM. Inspect stat LLM, stat LLMFULL, stat LLMPlatform, and stat LLMOverhead where available. Default tracker allocations are a subset of platform tracker totals; do not add them together.

Asset/AssetClass tag sets are Experimental and add memory/runtime overhead. Use them only for targeted diagnosis and record that overhead.

Interpretation

• growth that stabilizes may be an intentional cache; prove its cap and eviction;
• repeated retained growth after teardown suggests surviving ownership;
• high alloc/free rate with stable total is churn, not a leak;
• LLM category attribution and detailed allocation callstacks answer different questions;
• GPU resources, driver memory, mapped files, and platform allocations may not equal UObject estimates.