{"width":"100%","url":"https://htn20190109.hatenablog.com/entry/2019/05/06/155549","provider_url":"https://hatena.blog","title":"\u52d5\u7684\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fhtn20190109.hatenablog.com%2Fentry%2F2019%2F05%2F06%2F155549\" title=\"\u52d5\u7684\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0 - HTN20190109\u306e\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","blog_url":"https://htn20190109.hatenablog.com/","blog_title":"HTN20190109\u306e\u65e5\u8a18","type":"rich","image_url":null,"description":"Oracle show parameter OPTIMIZER_DYNAMIC_SAMPLING alter session set OPTIMIZER_DYNAMIC_SAMPLING = 4; MySQL 14.13.16.2 \u975e\u6c38\u7d9a\u7684\u30aa\u30d7\u30c6\u30a3\u30de\u30a4\u30b6\u7d71\u8a08\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u69cb\u6210https://dev.mysql.com/doc/refman/5.6/ja/innodb-statistics-estimation.html show variables like 'innodb_stats%';set GLOBAL innodb_stats_persistent = off; \u203b\u6c38\u7d9a\u7684\u30aa\u30d7\u30c6\u30a3\u30de\u30a4\u2026","author_name":"HTN20190109","version":"1.0","published":"2019-05-06 15:55:49","height":"190","categories":["DB"],"provider_name":"Hatena Blog","author_url":"https://blog.hatena.ne.jp/HTN20190109/"}