Parallelized query execution across nodes, cores, and SIMD lanes

FOR CONTEXTWhere we zoom in: query computeClickHouse Cloud · Fresh-data pathQuery-ready dataIngest serviceIngest computeMergeTree tableOrderedraw dataIncremental MVOrdered pre-aggregatedFreshdatacontinuouslyRead serviceQuery computeFastanswerscontinuously
Drag to exploreCompute nodes

The numbers 1–48 identify illustrative data elements, not benchmark values. Node 2 receives elements 17–32. Its core 2 receives elements 21–24, which are assigned to four SIMD lanes for one instruction. Each lane applies the same multiplication by 10: 21, 22, 23 and 24 become 210, 220, 230 and 240. Multi-node processing refers to distributed queries; SIMD applies to supported operations.