select engine,optimizer_disk_read_ratio from information_schema.optimizer_costs where engine in ("memory","aria","default");
engine optimizer_disk_read_ratio
default 0.900000
MEMORY 0.300000
Aria 0.900000
select @@memory.optimizer_row_lookup_cost;
@@memory.optimizer_row_lookup_cost
0.800000
¤ Dauer der Verarbeitung: 0.11 Sekunden
(vorverarbeitet am 2026-10-08)
¤
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