mariadb-duckdb: switch to Parquet ingestion, remove PRIMARY KEY, add 2026-07-13 results#986
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… results - Switch dataset ingestion from TSV to Parquet via run_in_duckdb/read_parquet - Remove PRIMARY KEY → no ART index overhead on load - start/stop: use mariadbd-safe / mariadb-admin instead of systemctl - start: cap duckdb_max_threads=nproc/2 on machines with >32 logical CPUs (empirically optimal at physical core count; HT siblings add overhead) Results (CI build 70621, no PRIMARY KEY): c6a.4xlarge (16 vCPU): load=100 s, concurrent QPS=1.530 c6a.metal (192 vCPU): load=125 s, concurrent QPS=13.947
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MariaDB with DuckDB storage engine (ha_duckdb), CI build 70621.
Changes:
Results — 2026-07-13, CI build 70621, no PRIMARY KEY:
Source: https://github.com/MariaDB/server/tree/11.4/storage/duckdb