{"id":252369,"date":"2022-09-18T09:04:57","date_gmt":"2022-09-18T01:04:57","guid":{"rendered":"https:\/\/lrxjmw.cn\/?p=252369"},"modified":"2022-09-14T22:05:28","modified_gmt":"2022-09-14T14:05:28","slug":"oracle-lgwr-worker","status":"publish","type":"post","link":"https:\/\/lrxjmw.cn\/oracle-lgwr-worker.html","title":{"rendered":"Oracle \u7684Lgwr Worker\u7684\u5de5\u4f5c\u539f\u7406"},"content":{"rendered":"<table>\n<tbody>\n<tr>\n<td style=\"padding: 5px 12px; width: 25px; font-size: 22px; text-align: center; background: #E8E8E8; line-height: 30px; color: #999;\">\u5bfc\u8bfb<\/td>\n<td style=\"padding: 10px 10px 12px; line-height: 20px;\"><strong>\u5b9e\u9645\u4e0a\u6211\u770b\u5230\u4e00\u4e9b\u56fd\u4ea7\u6570\u636e\u5e93\u73b0\u5728\u4e5f\u5728\u8003\u8651\u4f7f\u7528\u591a\u4e2aWAL 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(max-width: 554px) 100vw, 554px\" \/><\/p>\n<p>\u6628\u5929\u6b63\u597d\u6709\u70b9\u7a7a\uff0c\u6211\u627e\u4e86\u4e00\u4e9b\u5173\u4e8e12C LGWR worker\u7684\u8d44\u6599\u770b\u4e86\u770b\u3002\u5728\u516c\u53f8\u7684\u6d4b\u8bd5\u73af\u5883\u4e0a\u4e5f\u627e\u4e86\u4e00\u595719.15\u7684\u73af\u5883\u68c0\u67e5\u4e86\u4e00\u4e0b\u3002\u53d1\u73b0\u8fd8\u771f\u5982\u540c\u4e8b\u6240\u8bf4\uff0c12C\u5f00\u59cb\uff0cOracle\u5df2\u7ecf\u81ea\u52a8\u5f00\u542fLGWR\u5e76\u53d1\u5199\u4e86\u3002\u572812C\u91cc\u589e\u52a0\u4e86LGnn\u8fdb\u7a0b\uff0c\u7528\u4e8e\u5b9e\u9645\u5199\u5165REDO\u6570\u636e\uff0cLGWR\u5b8c\u5168\u4e0d\u7ba1\u5199Redo Log\u6587\u4ef6\u7684\u4e8b\u60c5\uff0c\u53ea\u8d1f\u8d23\u53d1\u5e03\u4e00\u4e9b\u548cREDO\u843d\u76d8\u7684\u6d88\u606f\u4e86\u3002<\/p>\n<p>\u76ee\u524d\u6211\u770b\u7684\u5173\u4e8eLGWR worker\u7684\u8d44\u6599\u4e0d\u591a\uff0c\u4ece\u4e00\u4e9b\u8d44\u6599\u548c\u6211\u5bf9LGWR\u7684\u7406\u89e3\uff0cLGWR worker\u5e94\u8be5\u662f\u548cOracle Redo Strand\u6709\u5173\u7684\u3002Oracle\u7684LGWR worker\u90fd\u662f\u5206\u914d\u5230GROUP\u7684\uff0cGROUP\u7684\u6570\u91cf\u5982\u679c\u662f\u548cRedo public Strand\u76f8\u5173\uff0c\u90a3\u4e48\u6bcf\u4e2agroup\u5c31\u4e4b\u95f4\u5c31\u4e0d\u9700\u8981\u901a\u8fc7\u9501\u673a\u5236\u6765\u540c\u6b65\u5199\u5165\u5de5\u4f5c\u3002LGWR \u4e5f\u4e0d\u9700\u8981\u5728\u591a\u4e2aworker\u4e4b\u95f4\u505a\u534f\u540c\uff0c\u800c\u4ec5\u4ec5\u9700\u8981\u505a\u548c\u6d88\u606f\u516c\u544a\u76f8\u5173\u7684\u5171\u7ec4\u4e86\uff0c\u8fd9\u79cd\u673a\u5236\u5e94\u8be5\u662f\u6700\u4e3a\u9ad8\u6548\u7684\u3002\u5982\u679c\u591a\u4e2aworker\u4e4b\u95f4\u5199REDO\u6587\u4ef6\u8fd8\u9700\u8981\u95e9\u9501\u6765\u505a\u4e32\u884c\u5316\uff0c\u90a3\u4e48\u6548\u7387\u80af\u5b9a\u662f\u4e0d\u4f1a\u597d\u7684\u3002<\/p>\n<p>Redo Strand\u4eceOracle 11\u5f00\u59cb\u5c31\u5df2\u7ecf\u88ab\u7528\u6765\u52a0\u901fREDO\u6027\u80fd\u4e86\uff0cStrand\u7684\u76ee\u7684\u662f\u4e3a\u4e86\u63d0\u9ad8\u5e76\u53d1\u5199\u5165Redo Log buffer\u548cRedo Log\u6587\u4ef6\u65f6\u5019\u7684\u6027\u80fd\uff0c\u51cf\u5c11\u56e0\u4e3a\u4e32\u884c\u5316\u95e9\u9501\u7b49\u5f85\u5bfc\u81f4\u7684REDO\u6027\u80fd\u95ee\u9898\u3002Oracle\u4f1a\u6839\u636eCPU_COUNT\u7684\u503c\uff0c\u81ea\u52a8\u7684\u8c03\u6574Redo srand\u7684\u6570\u91cf\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lrxjmw.cn\/wp-content\/uploads\/2022\/09\/2-10.png\" alt=\"\" width=\"554\" height=\"169\" class=\"alignnone size-full wp-image-252371\" srcset=\"https:\/\/lrxjmw.cn\/wp-content\/uploads\/2022\/09\/2-10.png 554w, https:\/\/lrxjmw.cn\/wp-content\/uploads\/2022\/09\/2-10-300x92.png 300w\" sizes=\"auto, (max-width: 554px) 100vw, 554px\" \/><\/p>\n<p>Oracle\u4f1a\u6839\u636eCPU_COUNT\/16\u6765\u8bbe\u5b9aStrand\u7684\u6570\u91cf\uff0c\u5728LOG BUFFER\u4e2d\u4f1a\u6309\u7167Strand\u6570\u91cf\u5212\u5206\u4e3aN\u4e2a\u5b50\u6c60\uff0c\u5199\u5165REDO\u6570\u636e\u7684\u65f6\u5019\uff0c\u53ef\u4ee5\u5e76\u53d1\u7684\u5199\u5165\u4e0d\u540c\u7684STRAND\uff0c\u8fd9\u6837\u53ef\u4ee5\u51cf\u5c11\u9ad8\u5e76\u53d1LOG BUFFER\u5199\u5165\u7684\u6027\u80fd\u3002\u4e3a\u4e86\u786e\u4fdd\u8fd9\u4e00\u673a\u5236\u8d77\u4f5c\u7528\uff0c\u5728Redo Log\u6587\u4ef6\u4e2d\uff0c\u4e5f\u662f\u6309\u7167Strand\u7684\u65b9\u5f0f\u5206\u914dRedo Log\u6587\u4ef6\uff0c\u8fd9\u79cd\u6a21\u5f0f\u53ef\u4ee5\u8ba9Redo Log\u6587\u4ef6\u7684\u5199\u5165\u4e5f\u53ef\u4ee5\u9ad8\u901f\u5e76\u53d1\u3002Redo Strand\u4e3a12C\u7684LGWR worker\u79f0\u4e3a\u9ed8\u8ba4\u5f00\u542f\u7684\u529f\u80fd\u6253\u4e0b\u4e86\u4e00\u4e2a\u826f\u597d\u7684\u57fa\u7840\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lrxjmw.cn\/wp-content\/uploads\/2022\/09\/3-9.png\" alt=\"\" width=\"554\" height=\"64\" class=\"alignnone size-full wp-image-252373\" srcset=\"https:\/\/lrxjmw.cn\/wp-content\/uploads\/2022\/09\/3-9.png 554w, https:\/\/lrxjmw.cn\/wp-content\/uploads\/2022\/09\/3-9-300x35.png 300w\" sizes=\"auto, (max-width: 554px) 100vw, 554px\" \/><\/p>\n<p>\u6211\u8fd9\u4e2a\u73af\u5883\u7684CPU_COUNT\u662f16\uff0c\u800c\u6bcf\u4e2a\u5b9e\u4f8b\u7684Redo Strand\u6700\u5c0f\u503c\u662f2\uff0c\u56e0\u6b64\u542f\u52a8\u5b9e\u4f8b\u7684\u65f6\u5019\u4e5f\u542f\u52a8\u4e862\u4e2aLGWR worker\uff0c\u8fd9\u8bf4\u660e\u6570\u636e\u5e93\u5b9e\u4f8b\u6709\u4e24\u4e2aLGWR worker group\uff0c\u5f53\u7cfb\u7edf\u7a7a\u95f2\uff0c\u6ca1\u6709\u4ec0\u4e48\u9700\u8981\u5199\u5165\u7684REDO\u6570\u636e\u7684\u65f6\u5019\uff0cLGnn\u90fd\u5728\u7b49\u5f85\u7a7a\u95f2\u7b49\u5f85\u4e8b\u4ef6LGWR worker group idle\uff0c\u800clgwr\u8fdb\u7a0b\u5728\u7b49\u5f85rdbms ipc message\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lrxjmw.cn\/wp-content\/uploads\/2022\/09\/4-8.png\" alt=\"\" width=\"554\" height=\"231\" class=\"alignnone size-full wp-image-252374\" srcset=\"https:\/\/lrxjmw.cn\/wp-content\/uploads\/2022\/09\/4-8.png 554w, https:\/\/lrxjmw.cn\/wp-content\/uploads\/2022\/09\/4-8-300x125.png 300w\" sizes=\"auto, (max-width: 554px) 100vw, 554px\" \/><\/p>\n<p>\u901a\u8fc7strace\u770blgwr\uff0c\u4e5f\u53ea\u662f\u5728\u505a\u4e00\u4e9b\u4fe1\u53f7\u91cf\u65b9\u9762\u7684\u64cd\u4f5c\u3002\u6211\u4eec\u518d\u6765\u770b\u770b\u7a7a\u95f2\u65f6\u7684LGnn\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lrxjmw.cn\/wp-content\/uploads\/2022\/09\/5-9.png\" alt=\"\" width=\"554\" height=\"267\" class=\"alignnone size-full wp-image-252375\" srcset=\"https:\/\/lrxjmw.cn\/wp-content\/uploads\/2022\/09\/5-9.png 554w, https:\/\/lrxjmw.cn\/wp-content\/uploads\/2022\/09\/5-9-300x145.png 300w\" sizes=\"auto, (max-width: 554px) 100vw, 554px\" \/><\/p>\n<p>\u4e5f\u662f\u5728\u76f8\u540c\u7684\u4fe1\u53f7\u91cf\u4e0a\u4f11\u7720\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lrxjmw.cn\/wp-content\/uploads\/2022\/09\/6-8.png\" alt=\"\" width=\"554\" height=\"253\" class=\"alignnone size-full wp-image-252376\" srcset=\"https:\/\/lrxjmw.cn\/wp-content\/uploads\/2022\/09\/6-8.png 554w, https:\/\/lrxjmw.cn\/wp-content\/uploads\/2022\/09\/6-8-300x137.png 300w\" sizes=\"auto, (max-width: 554px) 100vw, 554px\" \/><\/p>\n<p>\u53ef\u4ee5\u770b\u51faLGWR\u7684\u7b49\u5f85\u4e8b\u4ef6\u53d1\u751f\u4e86\u53d8\u5316\uff0c\u800cLGnn\u7684\u7b49\u5f85\u4e8b\u4ef6\u4e5f\u548c\u4ee5\u524d\u7684LGWR\u5341\u5206\u7c7b\u4f3c\u3002\u4ece\u7b49\u5f85\u4e8b\u4ef6\u4e0a\u770b\uff0c\u5f53\u4e00\u4e2aworker\u5b8c\u6210\u5de5\u4f5c\u540e\uff0c\u4f1a\u5904\u4e8eOrdering\u7b49\u5f85\uff0c\u7b49\u5f85\u83b7\u53d6\u53e6\u5916\u7684\u5199\u4efb\u52a1\u3002\u5728\u5177\u4f53\u5b9e\u73b0\u7b97\u6cd5\u4e0a\uff0c\u8fd8\u5e76\u6ca1\u6709\u548c\u6211\u60f3\u8c61\u7684\u4e00\u6837\u4e0d\u9700\u8981\u8c03\u5ea6\u3002\u6211\u4eec\u518d\u6765TRACE\u4e00\u4e0bLGWR\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lrxjmw.cn\/wp-content\/uploads\/2022\/09\/7-4.png\" alt=\"\" width=\"554\" height=\"215\" class=\"alignnone size-full wp-image-252377\" srcset=\"https:\/\/lrxjmw.cn\/wp-content\/uploads\/2022\/09\/7-4.png 554w, https:\/\/lrxjmw.cn\/wp-content\/uploads\/2022\/09\/7-4-300x116.png 300w\" sizes=\"auto, (max-width: 554px) 100vw, 554px\" \/><\/p>\n<p>\u53ef\u4ee5\u770b\u51faLGWR\u8fd8\u662f\u5341\u5206\u9891\u7e41\u7684\u5728\u64cd\u4f5c\u90a3\u4e2a\u4fe1\u53f7\u91cf\uff0c\u8fd9\u5f88\u53ef\u80fd\u662fLGWR\u5728\u79ef\u6781\u53c2\u4e0e\u65e5\u5fd7\u5199\u7684\u8c03\u5ea6\u534f\u8c03\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lrxjmw.cn\/wp-content\/uploads\/2022\/09\/8-5.png\" alt=\"\" width=\"554\" height=\"248\" class=\"alignnone size-full wp-image-252378\" srcset=\"https:\/\/lrxjmw.cn\/wp-content\/uploads\/2022\/09\/8-5.png 554w, https:\/\/lrxjmw.cn\/wp-content\/uploads\/2022\/09\/8-5-300x134.png 300w\" 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