two most popular databases are the Oracle Autonomous Database and Oracle MySQL," said Oracle Chairman and CTO, Larry Ellison. "The Oracle Database once again delivered solid revenue growth in FY21. And while our Oracle Database business as measured by revenue currently dwarfs our MySQL database business— that is about to change because the latest version of Oracle MySQL has been upgraded to include a revolutionary new ultra-high- performance parallel processing query engine called HeatWave.” 出典:https://investor.oracle.com/investor-news/news-details/2021/Oracle-Announces-Fiscal-2021-Fourth-Quarter-and-Fiscal-Full-Year-Financial-Results/default.aspx
new ultra-high-performance parallel processing query engine called HeatWave.” 出典:https://investor.oracle.com/investor-news/news-details/2021/Oracle-Announces-Fiscal-2021-Fourth-Quarter-and-Fiscal-Full-Year-Financial-Results/default.aspx
core executes a join kernel between small R and S partitions Hash tables are typically compact and fits into lower level CPU caches k S h1 (key) . . . 1 p . . . . . . R h1 (key) 1 p k . . . ① Partition ① Partition ② Build ③ Probe h2 (k) join kernel このデータが通常はCPUの下位のキャッシュに収まるサイズ