{"height":"190","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fkameid.hatenadiary.org%2Fentry%2F20090323%2F1237782121\" title=\"Prioritized Subscription \u6642\u306e Q4M \u306e\u52d5\u4f5c - kameid\u306e\u5099\u5fd8\u9332 - Sharpen the Saw!\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","blog_title":"kameid\u306e\u5099\u5fd8\u9332 - Sharpen the Saw!","image_url":null,"url":"https://kameid.hatenadiary.org/entry/20090323/1237782121","title":"Prioritized Subscription \u6642\u306e Q4M \u306e\u52d5\u4f5c","width":"100%","author_name":"kameid","categories":["Linux","\u975e\u540c\u671f\u30ad\u30e5\u30fc"],"provider_name":"Hatena Blog","provider_url":"https://hatena.blog","type":"rich","version":"1.0","description":"\u8907\u6570\u306e\u30ad\u30e5\u30fc\u306e\u4e2d\u3067\u3001\u30c7\u30fc\u30bf\u306e\u3042\u308b\u3082\u306e\u3092\u63a2\u3057\u3066\u53d6\u3063\u3066\u6765\u308b Q4M \u306e\u4fbf\u5229\u6a5f\u80fd\u3002 mysql> SELECT queue_wait('high_priority_table', 'low_priority_table', 10); \u3053\u308c\u306e\u3053\u3068\u3002 \u30a8\u30e9\u30fc\u30ad\u30e5\u30fc\u3068\u3057\u3066\u30a6\u30c1\u3067\u306f\u4f7f\u304a\u3046\u3068\u601d\u3063\u3066\u3044\u308b\u304c\u3001\u3053\u308c\u306e\u52d5\u304d\u306b\u82e5\u5e72\u7656\u304c\u3042\u3063\u305f\u306e\u3067\u30e1\u30e2\u3063\u3068\u304f\u3002 \u307e\u305a\u3001\u3053\u306e\u66f8\u304d\u65b9\u3092\u3059\u308b\u3068\u304d\u306f\u3001\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u6307\u5b9a\u304c\u5fc5\u9808\u3002 select queue_wait('a', 'b'); \u3053\u3046\u3044\u3046\u66f8\u304d\u65b9\u3092\u3059\u308b\u3068\u3001a \u30c6\u30fc\u30d6\u30eb\u306e\u4e2d\u8eab\u3057\u304b\u898b\u3066\u304f\u308c\u306a\u3044\u3002 select queue_wait('a', 'b', 60); \u306e\u3088\u3046\u306b\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u3092\u5fc5\u2026","published":"2009-03-23 13:22:01","author_url":"https://blog.hatena.ne.jp/kameid/","blog_url":"https://kameid.hatenadiary.org/"}