{"provider_name":"Hatena Blog","categories":["Oracle","\u5b9f\u884c\u8a08\u753b","Database"],"description":"\u8868\u984c\u306e\u901a\u308a\u3001Dynamic Sampling \u3092 11 \u306b\u30bb\u30c3\u30c8\u3059\u308b\u3068\u3001Dynamic Sampling \u306e \u7d50\u679c \u304c Result Cache \u306b\u683c\u7d0d\u3055\u308c\u3066\u3001\u7570\u306a\u308bSQL(sql_id \u304c \u7570\u306a\u308b SQL) \u3067 Dynamic Dampling \u306e \u7d50\u679c\u304c\u5171\u6709\u3055\u308c\u308b\u3093\u3084\u3067\u3002\u5f61(\uff9f)(\uff9f) \u5f93\u6765\u306e\u52d5\u4f5c SQL\u306e\u5b9f\u884c\u8a08\u753b\u4f5c\u6210\u6642(Hard Parse\u6642)\u306b Dynamic Sampling \u304c\u52d5\u4f5c\u3059\u308b\u3002 \u203bDynamic Sampling\u306f\u5b9f\u884c\u8a08\u753b\u4f5c\u6210\u306e\u90fd\u5ea6\u52d5\u4f5c\u3059\u308b\u3002 Dynamic Sampling = 11 \u306e\u52d5\u4f5c 1. SQL\u306e\u5b9f\u884c\u8a08\u753b\u4f5c\u6210\u6642(Hard Parse\u6642)\u306b Dynamic Sa\u2026","author_url":"https://blog.hatena.ne.jp/gonsuke777/","height":"190","provider_url":"https://hatena.blog","title":"Oracle Database 12c \u3067 OPTIMIZER_DYNAMIC_SAMPLING=11 \u3092\u30bb\u30c3\u30c8\u3059\u308b\u3068\u3001Dynamic Sampling \u306e \u7d50\u679c \u304c RESULT CACHE \u306b\u683c\u7d0d\u3055\u308c\u3066\u3001\u7570\u306a\u308bSQL \u3067 \u5171\u6709\u3055\u308c\u308b\u3002","image_url":null,"version":"1.0","author_name":"gonsuke777","type":"rich","blog_url":"https://gonsuke777.hatenablog.com/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fgonsuke777.hatenablog.com%2Fentry%2F20160916%2F1474018219\" title=\"Oracle Database 12c \u3067 OPTIMIZER_DYNAMIC_SAMPLING=11 \u3092\u30bb\u30c3\u30c8\u3059\u308b\u3068\u3001Dynamic Sampling \u306e \u7d50\u679c \u304c RESULT CACHE \u306b\u683c\u7d0d\u3055\u308c\u3066\u3001\u7570\u306a\u308bSQL \u3067 \u5171\u6709\u3055\u308c\u308b\u3002 - \u306d\u3089\uff5eIT\u30a8\u30f3\u30b8\u30cb\u30a2\u96d1\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","width":"100%","blog_title":"\u306d\u3089\uff5eIT\u30a8\u30f3\u30b8\u30cb\u30a2\u96d1\u8a18","published":"2016-09-16 18:30:19","url":"https://gonsuke777.hatenablog.com/entry/20160916/1474018219"}