1.3. No BKL (Big Kernel Lock) The Big Kernel Lock is a giant lock that was introduced in Linux 2.0, when Alan Cox introduced SMP support for first time. But it was just an step to achieve SMP scalability - only one process can run kernel c…

select snap_id, sql_id, hash_value, old_hash_value, plan_hash_value, cost from stats$sql_plan_usage where hash_value = 3805929877; 参考 Secret ORACLE: Unleashing the Full Potential of the ORACLE DBMS by Leveraging Undocumented Features作者…

二分探索、ハッシュ、二分探索木、B木がわかりやすく比較されていたのでメモ。アルゴリズムクイックリファレンス作者: George T. Heineman,Gary Pollice,Stanley Selkow,黒川利明,黒川洋出版社/メーカー: オライリージャパン発売日: 2010/04/26メディア: 単…