Cap DuckDB compaction memory at 2 GB (#758)#762
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erikdarlingdata merged 1 commit intodevfrom Mar 30, 2026
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The in-memory DuckDB connection used for archive compaction was using the default memory_limit (80% of physical RAM), causing multi-GB spikes when decompressing large parquet archives. With 800 MB of compressed archives, this easily hits 5-7 GB. Set memory_limit=2GB so DuckDB spills to disk instead of consuming all available RAM. Also set preserve_insertion_order=false to reduce memory pressure since compaction has no meaningful row order. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
memory_limit = '2GB'on the in-memory DuckDB connection used for parquet archive compactionpreserve_insertion_order = falseto further reduce memory during COPY operationsRoot cause: the default
memory_limitis 80% of physical RAM. Decompressing 800 MB of parquet archives (user reported 230 MB query_store_stats alone) easily expands to 5-7 GB in memory.Companion to #760 which fixed the long-running event handler and delta cache leaks.
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