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The live route tables lose their random UUID key; the row id the prefix-length sample draws is declared as the integer key. The prefix tables are keyed by prefix and keep only first_seen; a batch inserts only prefixes not stored yet. A route update sets only the columns that change. Each kept index names the queries using it. Every write goes through one connection kept for writing, with a 1 GiB page cache; reading connections get 16 MiB, heap limits rise to 1.5 and 2 GiB (README "Memory"). Batch writes go in key order. A benchmark run by hand writes 250,000 updates on 5 million routes faster than the feed's 10,000 a second; a live run follows. Model: opus-5-5