{"id":180426,"date":"2024-11-09T10:10:18","date_gmt":"2024-11-09T02:10:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/180426\/"},"modified":"2024-11-09T10:10:19","modified_gmt":"2024-11-09T02:10:19","slug":"%e6%b7%b1%e5%ba%a6%e8%a7%a3%e6%9e%90oracle%e6%95%b8%e6%93%9a%e5%ba%ab%e9%8e%96%ef%bc%9a%e6%8f%90%e9%ab%98%e6%95%b8%e6%93%9a%e5%ae%89%e5%85%a8%e8%88%87%e6%95%88%e7%8e%87-oracle%e6%95%b8%e6%93%9a","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/180426\/","title":{"rendered":"\u6df1\u5ea6\u89e3\u6790Oracle\u6578\u64da\u5eab\u9396\uff1a\u63d0\u9ad8\u6578\u64da\u5b89\u5168\u8207\u6548\u7387 (oracle\u6578\u64da\u5eab\u7684\u9396)"},"content":{"rendered":"<h1 id=\"%e6%b7%b1%e5%ba%a6%e8%a7%a3%e6%9e%90oracle%e6%95%b8%e6%93%9a%e5%ba%ab%e9%8e%96%ef%bc%9a%e6%8f%90%e9%ab%98%e6%95%b8%e6%93%9a%e5%ae%89%e5%85%a8%e8%88%87%e6%95%88%e7%8e%87-AUJRozPCME\">\u6df1\u5ea6\u89e3\u6790Oracle\u6578\u64da\u5eab\u9396\uff1a\u63d0\u9ad8\u6578\u64da\u5b89\u5168\u8207\u6548\u7387<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u5b89\u5168\u6027\u548c\u6548\u7387\u81f3\u95dc\u91cd\u8981\u3002Oracle\u6578\u64da\u5eab\u4f5c\u70ba\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5176\u9396\u6a5f\u5236\u5728\u4fdd\u8b77\u6578\u64da\u5b8c\u6574\u6027\u548c\u63d0\u9ad8\u7cfb\u7d71\u6027\u80fd\u65b9\u9762\u767c\u63ee\u8457\u91cd\u8981\u4f5c\u7528\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eOracle\u6578\u64da\u5eab\u7684\u9396\u6a5f\u5236\uff0c\u4e26\u5206\u6790\u5176\u5c0d\u6578\u64da\u5b89\u5168\u548c\u6548\u7387\u7684\u5f71\u97ff\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e6%95%b8%e6%93%9a%e5%ba%ab%e9%8e%96%ef%bc%9f-AUJRozPCME\">\u4ec0\u9ebc\u662f\u6578\u64da\u5eab\u9396\uff1f<\/h2>\n<p>\u6578\u64da\u5eab\u9396\u662f\u4e00\u7a2e\u63a7\u5236\u5c0d\u6578\u64da\u5eab\u8cc7\u6e90\u8a2a\u554f\u7684\u6a5f\u5236\u3002\u7576\u591a\u500b\u7528\u6236\u6216\u61c9\u7528\u7a0b\u5e8f\u540c\u6642\u8a2a\u554f\u6578\u64da\u6642\uff0c\u9396\u53ef\u4ee5\u9632\u6b62\u6578\u64da\u4e0d\u4e00\u81f4\u6216\u640d\u58de\u7684\u60c5\u6cc1\u767c\u751f\u3002Oracle\u6578\u64da\u5eab\u4f7f\u7528\u9396\u4f86\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\uff0c\u4e26\u9632\u6b62\u540c\u6642\u64cd\u4f5c\u5c0e\u81f4\u7684\u885d\u7a81\u3002<\/p>\n<h2 id=\"oracle%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e9%8e%96%e9%a1%9e%e5%9e%8b-AUJRozPCME\">Oracle\u6578\u64da\u5eab\u7684\u9396\u985e\u578b<\/h2>\n<p>Oracle\u6578\u64da\u5eab\u4e3b\u8981\u6709\u5169\u7a2e\u9396\uff1a\u884c\u9396\u548c\u8868\u9396\u3002<\/p>\n<h3 id=\"%e8%a1%8c%e9%8e%96-AUJRozPCME\">\u884c\u9396<\/h3>\n<p>\u884c\u9396\u662f\u6307\u5c0d\u6578\u64da\u8868\u4e2d\u7684\u55ae\u500b\u884c\u9032\u884c\u9396\u5b9a\u3002\u9019\u7a2e\u9396\u5b9a\u65b9\u5f0f\u5141\u8a31\u591a\u500b\u7528\u6236\u540c\u6642\u8a2a\u554f\u540c\u4e00\u8868\uff0c\u4f46\u53ea\u80fd\u5c0d\u4e0d\u540c\u7684\u884c\u9032\u884c\u64cd\u4f5c\u3002\u884c\u9396\u7684\u512a\u52e2\u5728\u65bc\u5b83\u80fd\u5920\u63d0\u9ad8\u4e26\u767c\u6027\uff0c\u6e1b\u5c11\u9396\u7af6\u722d\uff0c\u5f9e\u800c\u63d0\u9ad8\u7cfb\u7d71\u7684\u6574\u9ad4\u6027\u80fd\u3002<\/p>\n<pre><code>-- \u793a\u4f8b\uff1a\u4f7f\u7528\u884c\u9396\nSELECT * FROM employees WHERE employee_id = 100 FOR UPDATE;\n<\/code><\/pre>\n<h3 id=\"%e8%a1%a8%e9%8e%96-AUJRozPCME\">\u8868\u9396<\/h3>\n<p>\u8868\u9396\u5247\u662f\u5c0d\u6574\u500b\u8868\u9032\u884c\u9396\u5b9a\u3002\u7576\u4e00\u500b\u7528\u6236\u5c0d\u8868\u9032\u884c\u64cd\u4f5c\u6642\uff0c\u5176\u4ed6\u7528\u6236\u5c07\u7121\u6cd5\u5c0d\u8a72\u8868\u9032\u884c\u4efb\u4f55\u64cd\u4f5c\u3002\u8868\u9396\u7684\u512a\u52e2\u5728\u65bc\u5b83\u80fd\u5920\u7c21\u5316\u9396\u7ba1\u7406\uff0c\u4f46\u7f3a\u9ede\u662f\u6703\u964d\u4f4e\u7cfb\u7d71\u7684\u4e26\u767c\u6027\u3002<\/p>\n<pre><code>-- \u793a\u4f8b\uff1a\u4f7f\u7528\u8868\u9396\nLOCK TABLE employees IN EXCLUSIVE MODE;\n<\/code><\/pre>\n<h2 id=\"%e9%8e%96%e7%9a%84%e9%a1%9e%e5%9e%8b%e8%88%87%e6%a8%a1%e5%bc%8f-AUJRozPCME\">\u9396\u7684\u985e\u578b\u8207\u6a21\u5f0f<\/h2>\n<p>Oracle\u6578\u64da\u5eab\u4e2d\u7684\u9396\u53ef\u4ee5\u6839\u64da\u5176\u6301\u6709\u7684\u6642\u9593\u548c\u7bc4\u570d\u9032\u4e00\u6b65\u5206\u985e\u3002\u4e3b\u8981\u6709\u4ee5\u4e0b\u5e7e\u7a2e\u6a21\u5f0f\uff1a<\/p>\n<ul>\n<li><strong>\u5171\u4eab\u9396\uff08Share Lock\uff09<\/strong>\uff1a\u5141\u8a31\u591a\u500b\u4e8b\u52d9\u540c\u6642\u8b80\u53d6\u6578\u64da\uff0c\u4f46\u4e0d\u5141\u8a31\u4fee\u6539\u3002<\/li>\n<li><strong>\u6392\u4ed6\u9396\uff08Exclusive Lock\uff09<\/strong>\uff1a\u53ea\u5141\u8a31\u4e00\u500b\u4e8b\u52d9\u5c0d\u6578\u64da\u9032\u884c\u8b80\u53d6\u548c\u4fee\u6539\u3002<\/li>\n<li><strong>\u610f\u5411\u9396\uff08Intent Lock\uff09<\/strong>\uff1a\u7528\u65bc\u6307\u793a\u4e00\u500b\u4e8b\u52d9\u5e0c\u671b\u5728\u66f4\u4f4e\u5c64\u7d1a\u4e0a\u7372\u5f97\u9396\u3002<\/li>\n<\/ul>\n<h2 id=\"%e9%8e%96%e7%9a%84%e7%ae%a1%e7%90%86%e8%88%87%e5%84%aa%e5%8c%96-AUJRozPCME\">\u9396\u7684\u7ba1\u7406\u8207\u512a\u5316<\/h2>\n<p>\u70ba\u4e86\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u6027\u80fd\uff0cOracle\u63d0\u4f9b\u4e86\u4e00\u4e9b\u5de5\u5177\u548c\u6280\u8853\u4f86\u7ba1\u7406\u548c\u512a\u5316\u9396\u7684\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u9069\u7576\u7684\u7d22\u5f15\u53ef\u4ee5\u6e1b\u5c11\u9396\u7684\u7af6\u722d\uff0c\u5f9e\u800c\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002\u6b64\u5916\uff0c\u5408\u7406\u8a2d\u8a08\u4e8b\u52d9\u7684\u7bc4\u570d\u548c\u6301\u6709\u6642\u9593\u4e5f\u80fd\u6709\u6548\u6e1b\u5c11\u9396\u7684\u885d\u7a81\u3002<\/p>\n<h2 id=\"%e9%8e%96%e7%9a%84%e7%9b%a3%e6%8e%a7-AUJRozPCME\">\u9396\u7684\u76e3\u63a7<\/h2>\n<p>Oracle\u6578\u64da\u5eab\u63d0\u4f9b\u4e86\u4e00\u4e9b\u8996\u5716\u4f86\u76e3\u63a7\u9396\u7684\u72c0\u614b\uff0c\u4f8b\u5982V$LOCK\u548cV$SESSION\u3002\u9019\u4e9b\u8996\u5716\u53ef\u4ee5\u5e6b\u52a9\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u8b58\u5225\u9396\u7af6\u722d\u7684\u554f\u984c\uff0c\u4e26\u9032\u884c\u76f8\u61c9\u7684\u8abf\u6574\u3002<\/p>\n<pre><code>-- \u793a\u4f8b\uff1a\u67e5\u8a62\u7576\u524d\u9396\u7684\u72c0\u614b\nSELECT * FROM V$LOCK;\n<\/code><\/pre>\n<h2 id=\"%e7%b5%90%e8%ab%96-AUJRozPCME\">\u7d50\u8ad6<\/h2>\n<p>Oracle\u6578\u64da\u5eab\u7684\u9396\u6a5f\u5236\u5728\u4fdd\u8b77\u6578\u64da\u5b89\u5168\u548c\u63d0\u9ad8\u7cfb\u7d71\u6548\u7387\u65b9\u9762\u767c\u63ee\u8457\u81f3\u95dc\u91cd\u8981\u7684\u4f5c\u7528\u3002\u901a\u904e\u5408\u7406\u4f7f\u7528\u884c\u9396\u548c\u8868\u9396\uff0c\u4e26\u7d50\u5408\u6709\u6548\u7684\u9396\u7ba1\u7406\u548c\u76e3\u63a7\u7b56\u7565\uff0c\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u6027\u80fd\u548c\u5b89\u5168\u6027\u3002\u4e86\u89e3\u548c\u638c\u63e1\u9019\u4e9b\u9396\u7684\u7279\u6027\uff0c\u5c07\u6709\u52a9\u65bc\u66f4\u597d\u5730\u7ba1\u7406\u548c\u512a\u5316Oracle\u6578\u64da\u5eab\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dcVPS\u548c\u6578\u64da\u5eab\u7ba1\u7406\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9 <a href=\"https:\/\/server.hk\">Server.HK<\/a>\uff0c\u6211\u5011\u63d0\u4f9b\u5404\u7a2e\u89e3\u6c7a\u65b9\u6848\u4ee5\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u89e3\u6790Oracle\u6578\u64da\u5eab\u9396\u7684\u6a5f\u5236\uff0c\u63d0\u5347\u6578\u64da\u5b89\u5168\u6027\u8207\u64cd\u4f5c\u6548\u7387\uff0c\u52a9\u60a8\u512a\u5316\u6578\u64da\u7ba1\u7406\u8207\u6027\u80fd\u8868\u73fe\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-180426","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180426","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=180426"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180426\/revisions"}],"predecessor-version":[{"id":180427,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180426\/revisions\/180427"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=180426"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=180426"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=180426"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}