{"id":5888,"date":"2026-06-16T16:15:28","date_gmt":"2026-06-16T16:15:28","guid":{"rendered":"https:\/\/cloudsave.app\/knowledge-base\/mssql-transaction-log-full-recovery\/"},"modified":"2026-06-16T16:40:17","modified_gmt":"2026-06-16T16:40:17","slug":"mssql-%e4%ba%a4%e6%98%93%e8%a8%98%e9%8c%84%e6%aa%94%e5%b7%b2%e6%bb%bf-%e9%a0%90%e9%98%b2%e8%88%87%e5%bf%ab%e9%80%9f%e5%be%a9%e5%8e%9f%e7%ad%96%e7%95%a5","status":"publish","type":"post","link":"https:\/\/cloudsave.app\/zh-hant\/knowledge-base\/mssql-%e4%ba%a4%e6%98%93%e8%a8%98%e9%8c%84%e6%aa%94%e5%b7%b2%e6%bb%bf-%e9%a0%90%e9%98%b2%e8%88%87%e5%bf%ab%e9%80%9f%e5%be%a9%e5%8e%9f%e7%ad%96%e7%95%a5\/","title":{"rendered":"MSSQL \u4ea4\u6613\u8a18\u9304\u6a94\u5df2\u6eff\uff1a\u9810\u9632\u8207\u5feb\u901f\u5fa9\u539f\u7b56\u7565"},"content":{"rendered":"<p>\u5c0d\u65bc\u7ba1\u7406 Microsoft SQL Server \u7684\u8cc7\u6599\u5eab\u7ba1\u7406\u54e1 (DBA) \u548c DevOps \u5de5\u7a0b\u5e2b\u800c\u8a00\uff0c\u5f88\u5c11\u6709\u8b66\u5831\u6703\u50cf\u932f\u8aa4 9002\uff1a<em>\u8cc7\u6599\u5eab &#8216;X&#8217; \u7684\u4ea4\u6613\u8a18\u9304\u5df2\u6eff<\/em> \u90a3\u6a23\u5f15\u8d77\u7acb\u5373\u7684\u7126\u616e\u3002\u7576\u4ea4\u6613\u8a18\u9304\u586b\u6eff\u4e14\u7121\u6cd5\u64f4\u5145\u6642\uff0c\u8cc7\u6599\u5eab\u5be6\u969b\u4e0a\u6703\u8b8a\u70ba\u552f\u8b80\u72c0\u614b\u3002\u6240\u6709 <code>INSERT<\/code>\u3001<code>UPDATE<\/code> \u548c <code>DELETE<\/code> \u4f5c\u696d\u90fd\u6703\u505c\u6b62\uff0c\u61c9\u7528\u7a0b\u5f0f\u4ea4\u6613\u6703\u5931\u6557\uff0c\u751f\u7522\u74b0\u5883\u4e5f\u6703\u9677\u5165\u505c\u6eef\u3002<\/p>\n<p>\u4e86\u89e3 SQL Server \u4ea4\u6613\u8a18\u9304\u7684\u5e95\u5c64\u67b6\u69cb\u3001\u6e96\u78ba\u8a3a\u65b7\u6839\u672c\u539f\u56e0\u4e26\u57f7\u884c\u5feb\u901f\u5fa9\u539f\u7a0b\u5e8f\uff0c\u662f\u7dad\u6301\u9ad8\u53ef\u7528\u6027\u7684\u95dc\u9375\u6280\u80fd\u3002\u672c\u7d9c\u5408\u6307\u5357\u5c07\u63a2\u8a0e\u4ea4\u6613\u8a18\u9304\u7684\u904b\u4f5c\u6a5f\u5236\u3001\u5982\u4f55\u5728\u7dca\u6025\u60c5\u6cc1\u4e0b\u89e3\u6c7a\u8a18\u9304\u5df2\u6eff\u7684\u554f\u984c\uff0c\u4ee5\u53ca\u9632\u6b62\u6b64\u985e\u60c5\u6cc1\u518d\u6b21\u767c\u751f\u7684\u67b6\u69cb\u6700\u4f73\u5be6\u8e10\u3002<\/p>\n<h2>\u4e86\u89e3 SQL Server \u4ea4\u6613\u8a18\u9304\u67b6\u69cb<\/h2>\n<p>\u8981\u6709\u6548\u6392\u67e5\u4ea4\u6613\u8a18\u9304\u5df2\u6eff\u7684\u554f\u984c\uff0c\u60a8\u5fc5\u9808\u5148\u4e86\u89e3 SQL Server \u5982\u4f55\u5beb\u5165\u548c\u7ba1\u7406\u8cc7\u6599\u3002<\/p>\n<h3>\u9810\u5beb\u5f0f\u8a18\u9304 (Write-Ahead Logging, WAL)<\/h3>\n<p>SQL Server \u4f7f\u7528\u9810\u5beb\u5f0f\u8a18\u9304 (WAL) \u5354\u5b9a\u3002\u6bcf\u7576\u767c\u751f\u8cc7\u6599\u4fee\u6539\u6642\uff0c\u8b8a\u66f4\u6703\u5148\u5beb\u5165\u8a18\u61b6\u9ad4\u4e2d\u7684\u4ea4\u6613\u8a18\u9304\uff0c\u7136\u5f8c\u5728\u5be6\u969b\u8cc7\u6599\u9801\u9762\u65bc\u8cc7\u6599\u5eab\u6a94\u6848 (MDF\/NDF) \u4e2d\u66f4\u65b0\u4e4b\u524d\uff0c\u5148\u5237\u65b0\u81f3\u78c1\u789f\u4e0a\u7684\u5be6\u9ad4\u8a18\u9304\u6a94\u3002\u9019\u4fdd\u8b49\u4e86 ACID\uff08\u539f\u5b50\u6027\u3001\u4e00\u81f4\u6027\u3001\u9694\u96e2\u6027\u3001\u6301\u4e45\u6027\uff09\u5408\u898f\u6027\uff0c\u78ba\u4fdd\u5728\u767c\u751f\u5d29\u6f70\u6642\uff0cSQL Server \u53ef\u4ee5\u91cd\u64ad (roll forward) \u6216\u5fa9\u539f (roll back) \u4ea4\u6613\u3002<\/p>\n<h3>\u865b\u64ec\u8a18\u9304\u6a94 (VLFs) \u8207\u5faa\u74b0\u8a18\u9304<\/h3>\n<p>\u5728\u5167\u90e8\uff0c\u5be6\u9ad4\u4ea4\u6613\u8a18\u9304\u6a94 (LDF) \u88ab\u5283\u5206\u70ba\u7a31\u70ba\u865b\u64ec\u8a18\u9304\u6a94 (VLF) \u7684\u8f03\u5c0f\u908f\u8f2f\u5340\u6bb5\u3002\u4ea4\u6613\u8a18\u9304\u4ee5\u5faa\u74b0\u65b9\u5f0f\u904b\u4f5c\u3002\u7576\u8a18\u9304\u5beb\u5165\u6642\uff0c\u5b83\u5011\u6703\u586b\u6eff\u4e00\u500b VLF \u4e26\u79fb\u52d5\u5230\u4e0b\u4e00\u500b\u3002<\/p>\n<p>\u7576\u8a18\u9304\u5230\u9054\u5be6\u9ad4\u6a94\u6848\u672b\u5c3e\u6642\uff0c\u5b83\u6703\u5617\u8a66\u7e5e\u56de\u5230\u958b\u982d\u3002\u4f46\u662f\uff0c\u53ea\u6709\u5728 VLF \u88ab\u6a19\u8a18\u70ba<strong>\u975e\u4f5c\u7528\u4e2d (inactive)<\/strong> \u6642\uff0c\u5b83\u624d\u80fd\u8986\u5beb\u8a72 VLF\u3002\u5982\u679c\u6240\u6709 VLF \u90fd\u662f\u4f5c\u7528\u4e2d\u7684\uff08\u610f\u5473\u8457\u5b83\u5011\u5305\u542b SQL Server \u4ecd\u9700\u8981\u7684\u8a18\u9304\uff09\uff0c\u5247\u8a18\u9304\u7121\u6cd5\u7e5e\u56de\u3002\u5982\u679c\u555f\u7528\u4e86\u81ea\u52d5\u6210\u9577\u4e14\u78c1\u789f\u7a7a\u9593\u53ef\u7528\uff0c\u5be6\u9ad4\u6a94\u6848\u6703\u64f4\u5145\u3002\u5982\u679c\u78c1\u789f\u5df2\u6eff\u6216\u81ea\u52d5\u6210\u9577\u53d7\u5230\u9650\u5236\uff0c\u60a8\u5c31\u6703\u9047\u5230\u932f\u8aa4 9002\u3002<\/p>\n<h3>\u8a18\u9304\u622a\u65b7 (Truncation) \u8207\u8a18\u9304\u58d3\u7e2e (Shrinking)<\/h3>\n<p>\u4e00\u500b\u5e38\u898b\u7684\u8aa4\u89e3\u662f\u622a\u65b7\u8a18\u9304\u6703\u6e1b\u5c11\u5be6\u9ad4\u6a94\u6848\u5927\u5c0f\u3002<br \/>\n*   <strong>\u8a18\u9304\u622a\u65b7\uff1a<\/strong>\u5c07\u4f5c\u7528\u4e2d VLF \u6a19\u8a18\u70ba\u975e\u4f5c\u7528\u4e2d\u7684\u904e\u7a0b\uff0c\u4f7f\u7a7a\u9593\u53ef\u7528\u65bc\u91cd\u8907\u4f7f\u7528\u3002\u5b83<em>\u4e0d\u6703<\/em>\u6e1b\u5c11\u78c1\u789f\u4e0a LDF \u6a94\u6848\u7684\u5927\u5c0f\u3002<br \/>\n*   <strong>\u8a18\u9304\u58d3\u7e2e\uff1a<\/strong>\u7269\u7406\u4e0a\u6e1b\u5c11 LDF \u6a94\u6848\u5927\u5c0f\u4e26\u5c07\u7a7a\u9593\u6b78\u9084\u7d66\u4f5c\u696d\u7cfb\u7d71\u7684\u904e\u7a0b\u3002<\/p>\n<p>\u5728\u5b8c\u6574\u5fa9\u539f\u6a21\u5f0f\u4e0b\uff0c\u8a18\u9304\u622a\u65b7<em>\u50c5<\/em>\u5728\u6210\u529f\u5b8c\u6210\u4ea4\u6613\u8a18\u9304\u5099\u4efd\u6642\u624d\u6703\u767c\u751f\uff08\u5047\u8a2d\u6c92\u6709\u5176\u4ed6\u7a0b\u5e8f\u4fdd\u6301\u8a18\u9304\u70ba\u4f5c\u7528\u4e2d\u72c0\u614b\uff09\u3002<\/p>\n<h2>\u8a3a\u65b7\u300c\u4ea4\u6613\u8a18\u9304\u5df2\u6eff\u300d\u932f\u8aa4 (\u932f\u8aa4 9002)<\/h2>\n<p>\u7576\u8a18\u9304\u5df2\u6eff\u6642\uff0c\u60a8\u7684\u7b2c\u4e00\u6b65\u4e0d\u61c9\u8a72\u662f\u76f2\u76ee\u5730\u589e\u52a0\u78c1\u789f\u7a7a\u9593\u6216\u58d3\u7e2e\u6a94\u6848\u3002\u60a8\u5fc5\u9808\u627e\u51fa<em>\u70ba\u4ec0\u9ebc<\/em>\u8a18\u9304\u7121\u6cd5\u622a\u65b7\u3002SQL Server \u63d0\u4f9b\u4e86\u5167\u5efa\u6a5f\u5236\uff0c\u900f\u904e <code>sys.databases<\/code> \u76ee\u9304\u6aa2\u8996\u4f86\u544a\u8a34\u60a8\u78ba\u5207\u662f\u4ec0\u9ebc\u539f\u56e0\u963b\u6b62\u4e86\u8a18\u9304\u91cd\u8907\u4f7f\u7528\u3002<\/p>\n<p>\u57f7\u884c\u4ee5\u4e0b T-SQL \u6307\u4ee4\u4f86\u8b58\u5225\u74f6\u9838\uff1a<\/p>\n<pre><code class=\"language-sql\">SELECT \n    name AS DatabaseName, \n    recovery_model_desc AS RecoveryModel, \n    log_reuse_wait_desc AS LogReuseWaitReason\nFROM sys.databases\nWHERE name = 'YourDatabaseName';\n<\/code><\/pre>\n<p>\u60a8\u4e5f\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u6307\u4ee4\u6aa2\u67e5\u4ea4\u6613\u8a18\u9304\u76ee\u524d\u7684\u7a7a\u9593\u4f7f\u7528\u60c5\u6cc1\uff1a<\/p>\n<pre><code class=\"language-sql\">DBCC SQLPERF(LOGSPACE);\n<\/code><\/pre>\n<h3>\u5e38\u898b\u7684 <code>log_reuse_wait_desc<\/code> \u72c0\u614b<\/h3>\n<ol>\n<li><strong>LOG_BACKUP\uff1a<\/strong>\u8cc7\u6599\u5eab\u8655\u65bc\u5b8c\u6574\u6216\u5927\u91cf\u8a18\u9304\u5fa9\u539f\u6a21\u5f0f\uff0c\u4e14\u6700\u8fd1\u672a\u9032\u884c\u4ea4\u6613\u8a18\u9304\u5099\u4efd\u3002\u9019\u662f\u6700\u5e38\u898b\u7684\u539f\u56e0\u3002<\/li>\n<li><strong>ACTIVE_TRANSACTION\uff1a<\/strong>\u9577\u6642\u9593\u57f7\u884c\u7684\u4ea4\u6613\uff08\u4f8b\u5982\u5927\u898f\u6a21\u7d22\u5f15\u91cd\u5efa\u6216\u88ab\u907a\u5fd8\u7684\u672a\u63d0\u4ea4\u4ea4\u6613\uff09\u4f7f\u8a18\u9304\u4fdd\u6301\u4f5c\u7528\u4e2d\u3002<\/li>\n<li><strong>REPLICATION \/ CDC\uff1a<\/strong>\u555f\u7528\u4e86\u4ea4\u6613\u5f0f\u8907\u5beb\u6216\u7570\u52d5\u8cc7\u6599\u64f7\u53d6 (CDC)\uff0c\u4e14\u8a18\u9304\u8b80\u53d6\u5668\u4ee3\u7406\u7a0b\u5f0f\u5c1a\u672a\u8655\u7406\u9019\u4e9b\u4ea4\u6613\u3002<\/li>\n<li><strong>AVAILABILITY_REPLICA\uff1a<\/strong>\u5728 AlwaysOn \u53ef\u7528\u6027\u7fa4\u7d44\u4e2d\uff0c\u6b21\u8981\u8907\u672c\u5df2\u4e2d\u65b7\u9023\u7dda\u6216\u540c\u6b65\u901f\u5ea6\u904e\u6162\uff0c\u8feb\u4f7f\u4e3b\u8981\u8907\u672c\u4fdd\u7559\u8a18\u9304\uff0c\u76f4\u5230\u5b83\u5011\u5728\u6b21\u8981\u8907\u672c\u4e0a\u5b8c\u6210\u5beb\u5165\u3002<\/li>\n<\/ol>\n<h2>\u5feb\u901f\u5fa9\u539f\u7b56\u7565\uff1a\u5728\u751f\u7522\u74b0\u5883\u4e2d\u89e3\u6c7a\u554f\u984c<\/h2>\n<p>\u6839\u64da\u50b3\u56de\u7684 <code>log_reuse_wait_desc<\/code>\uff0c\u60a8\u7684\u7dca\u6025\u61c9\u8b8a\u63aa\u65bd\u6703\u6709\u6240\u4e0d\u540c\u3002\u4ee5\u4e0b\u662f\u91dd\u5c0d\u6700\u5e38\u898b\u60c5\u6cc1\u7684\u5feb\u901f\u5fa9\u539f\u7b56\u7565\u3002<\/p>\n<h3>\u60c5\u5883 1\uff1a\u907a\u5931\u6216\u5931\u6557\u7684\u8a18\u9304\u5099\u4efd (<code>LOG_BACKUP<\/code>)<\/h3>\n<p>\u5982\u679c\u7b49\u5f85\u985e\u578b\u70ba <code>LOG_BACKUP<\/code>\uff0c\u89e3\u6c7a\u65b9\u6848\u5f88\u7c21\u55ae\uff1a\u60a8\u5fc5\u9808\u5099\u4efd\u4ea4\u6613\u8a18\u9304\u3002<\/p>\n<pre><code class=\"language-sql\">BACKUP LOG [YourDatabaseName] \nTO DISK = 'N:BackupsYourDatabaseName_EmergencyLog.trn' \nWITH COMPRESSION, STATS = 10;\n<\/code><\/pre>\n<p>\u5099\u4efd\u5b8c\u6210\u5f8c\uff0c\u975e\u4f5c\u7528\u4e2d\u7684 VLF \u5c07\u88ab\u622a\u65b7\uff0cSQL Server \u5c07\u6062\u5fa9\u6b63\u5e38\u904b\u4f5c\u3002\u5982\u679c\u60a8\u7684\u5099\u4efd\u78c1\u789f\u5df2\u6eff\uff0c\u60a8\u53ef\u80fd\u9700\u8981\u5099\u4efd\u5230\u81e8\u6642\u7db2\u8def\u5171\u7528\u6216 null \u88dd\u7f6e\uff08\u9664\u975e\u8cc7\u6599\u5eab\u5f88\u5bb9\u6613\u91cd\u73fe\uff0c\u5426\u5247\u5f37\u70c8\u4e0d\u5efa\u8b70\u9019\u6a23\u505a\uff0c\u56e0\u70ba\u9019\u6703\u4e2d\u65b7\u8a18\u9304\u93c8\uff09\uff1a<\/p>\n<pre><code class=\"language-sql\">-- \u8b66\u544a\uff1a\u9019\u6703\u4e2d\u65b7\u8a18\u9304\u93c8\u4e26\u640d\u5bb3\u6642\u9593\u9ede\u5fa9\u539f\u3002\n-- \u50c5\u5728\u7d55\u5c0d\u5fc5\u8981\u6642\u4f7f\u7528\uff0c\u4e26\u7acb\u5373\u57f7\u884c\u5b8c\u6574\u5099\u4efd\u3002\nBACKUP LOG [YourDatabaseName] TO DISK = 'NUL';\n<\/code><\/pre>\n<h3>\u60c5\u5883 2\uff1a\u9577\u6642\u9593\u57f7\u884c\u7684\u4f5c\u7528\u4e2d\u4ea4\u6613 (<code>ACTIVE_TRANSACTION<\/code>)<\/h3>\n<p>\u5982\u679c\u55ae\u4e00\u4ea4\u6613\u57f7\u884c\u4e86\u6578\u5c0f\u6642\uff0c\u5b83\u6703\u5c0e\u81f4\u6574\u500b\u671f\u9593\u7121\u6cd5\u622a\u65b7\u8a18\u9304\u3002\u9996\u5148\uff0c\u8b58\u5225\u6709\u554f\u984c\u7684\u4ea4\u6613\uff1a<\/p>\n<pre><code class=\"language-sql\">DBCC OPENTRAN('YourDatabaseName');\n<\/code><\/pre>\n<p>\u6b64\u6307\u4ee4\u6703\u50b3\u56de\u6700\u820a\u7684\u4f5c\u7528\u4e2d\u4ea4\u6613\u53ca\u5176\u4f3a\u670d\u5668\u8655\u7406\u7a0b\u5e8f ID (SPID)\u3002\u60a8\u53ef\u4ee5\u900f\u904e\u67e5\u8a62\u52d5\u614b\u7ba1\u7406\u6aa2\u8996 (DMV) \u4f86\u6536\u96c6\u6709\u95dc\u8a72 SPID \u6b63\u5728\u57f7\u884c\u4ec0\u9ebc\u4f5c\u696d\u7684\u66f4\u591a\u8a73\u7d30\u8cc7\u8a0a\uff1a<\/p>\n<pre><code class=\"language-sql\">SELECT \n    s.session_id,\n    s.login_name,\n    s.host_name,\n    r.start_time,\n    r.status,\n    r.command,\n    t.text AS QueryText\nFROM sys.dm_exec_sessions s\nJOIN sys.dm_exec_requests r ON s.session_id = r.session_id\nCROSS APPLY sys.dm_exec_sql_text(r.sql_handle) t\nWHERE s.session_id = &lt;SPID_FROM_DBCC_OPENTRAN&gt;;\n<\/code><\/pre>\n<p>\u5982\u679c\u8a72\u4ea4\u6613\u662f\u7570\u5e38\u67e5\u8a62\u6216\u505c\u6eef\u7684\u7a0b\u5e8f\uff0c\u60a8\u53ef\u80fd\u9700\u8981\u7d42\u6b62\u5b83\u4ee5\u91cb\u653e\u8a18\u9304\u3002<\/p>\n<pre><code class=\"language-sql\">KILL &lt;SPID&gt;;\n<\/code><\/pre>\n<p><em>\u6ce8\u610f\uff1a\u7d42\u6b62\u5927\u898f\u6a21\u4ea4\u6613\u6703\u89f8\u767c\u5fa9\u539f (rollback)\uff0c\u9019\u53ef\u80fd\u9700\u8981\u76f8\u7576\u9577\u7684\u6642\u9593\uff0c\u4e26\u6703\u66ab\u6642\u7522\u751f\u984d\u5916\u7684\u8a18\u9304\u6d3b\u52d5\u3002\u5728\u5fa9\u539f\u671f\u9593\u8acb\u52ff\u91cd\u65b0\u555f\u52d5 SQL Server \u670d\u52d9\uff0c\u5426\u5247\u8cc7\u6599\u5eab\u5c07\u5728\u91cd\u65b0\u555f\u52d5\u6642\u9032\u5165\u5fa9\u539f\u6a21\u5f0f\u3002<\/em><\/p>\n<h3>\u60c5\u5883 3\uff1a\u7dca\u6025\u7a7a\u9593\u914d\u7f6e\uff08\u78c1\u789f 100% \u5df2\u6eff\uff09<\/h3>\n<p>\u5982\u679c LDF \u6a94\u6848\u5df2\u8017\u76e1\u6574\u500b\u78c1\u789f\u6a5f\uff0c\u60a8\u751a\u81f3\u7121\u6cd5\u57f7\u884c\u5099\u4efd\uff0c\u56e0\u70ba SQL Server \u9700\u8981\u6975\u5c11\u91cf\u7684\u8a18\u9304\u7a7a\u9593\u4f86\u8a18\u9304\u5099\u4efd\u4e8b\u4ef6\u672c\u8eab\u3002\u5728\u9019\u7a2e\u60c5\u6cc1\u4e0b\uff0c\u60a8\u5fc5\u9808\u5728\u5177\u6709\u53ef\u7528\u7a7a\u9593\u7684\u4e0d\u540c\u78c1\u789f\u6a5f\u4e0a\u65b0\u589e\u6b21\u8981\u8a18\u9304\u6a94\u3002<\/p>\n<pre><code class=\"language-sql\">ALTER DATABASE [YourDatabaseName]\nADD LOG FILE \n(\n    NAME = N'YourDatabaseName_Log2',\n    FILENAME = N'E:TempLogsYourDatabaseName_Log2.ldf',\n    SIZE = 5GB,\n    MAXSIZE = 50GB,\n    FILEGROWTH = 1GB\n);\n<\/code><\/pre>\n<p>\u9019\u6703\u7acb\u5373\u70ba SQL Server \u63d0\u4f9b\u5598\u606f\u7a7a\u9593\u3002\u4e00\u65e6\u8cc7\u6599\u5eab\u4e0a\u7dda\uff0c\u8acb\u57f7\u884c\u4ea4\u6613\u8a18\u9304\u5099\u4efd\uff0c\u6e05\u7a7a\u6b21\u8981\u8a18\u9304\u6a94\uff0c\u7136\u5f8c\u5c07\u5176\u79fb\u9664\uff1a<\/p>\n<pre><code class=\"language-sql\">-- 1. \u57f7\u884c\u8a18\u9304\u5099\u4efd\u4ee5\u622a\u65b7\u8a18\u9304\nBACKUP LOG [YourDatabaseName] TO DISK = '...';\n\n-- 2. \u6e05\u7a7a\u81e8\u6642\u8a18\u9304\u6a94\nDBCC SHRINKFILE (N'YourDatabaseName_Log2', EMPTYFILE);\n\n-- 3. \u79fb\u9664\u81e8\u6642\u8a18\u9304\u6a94\nALTER DATABASE [YourDatabaseName] REMOVE FILE [YourDatabaseName_Log2];\n<\/code><\/pre>\n<h2>\u4ea4\u6613\u8a18\u9304\u9810\u9632\u8207\u7ba1\u7406\u7684\u6700\u4f73\u5be6\u8e10<\/h2>\n<p>\u88ab\u52d5\u6392\u67e5\u554f\u984c\u58d3\u529b\u5927\u4e14\u6703\u5f71\u97ff SLA\u3002\u5be6\u65bd\u4e3b\u52d5\u7684\u67b6\u69cb\u8207\u71df\u904b\u6700\u4f73\u5be6\u8e10\u5c0d\u65bc\u4f01\u696d\u8cc7\u6599\u5eab\u7684\u7a69\u5b9a\u6027\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n<h3>1. \u5be6\u65bd\u5f37\u5927\u4e14\u81ea\u52d5\u5316\u7684\u5099\u4efd\u7b56\u7565<\/h3>\n<p>\u5982\u679c\u8cc7\u6599\u5eab\u8655\u65bc\u5b8c\u6574\u5fa9\u539f\u6a21\u5f0f\uff0c\u5247\u5fc5\u9808\u5b9a\u671f\u9032\u884c\u4ea4\u6613\u8a18\u9304\u5099\u4efd\u3002\u6839\u64da\u60a8\u7684\u5fa9\u539f\u9ede\u76ee\u6a19 (RPO) \u548c\u4ea4\u6613\u91cf\uff0c\u8a18\u9304\u5099\u4efd\u61c9\u6bcf 5 \u5230 15 \u5206\u9418\u57f7\u884c\u4e00\u6b21\u3002<\/p>\n<p>\u50cf CloudSave \u9019\u6a23\u7684\u4f01\u696d\u7d1a\u5099\u4efd\u89e3\u6c7a\u65b9\u6848\u986f\u8457\u7c21\u5316\u4e86\u6b64\u6d41\u7a0b\u3002\u900f\u904e VDI (\u865b\u64ec\u88dd\u7f6e\u4ecb\u9762) \u76f4\u63a5\u8207 SQL Server \u6574\u5408\uff0cCloudSave \u5141\u8a31 DBA \u8a2d\u5b9a\u7b56\u7565\u9a45\u52d5\u7684\u9ad8\u983b\u7387\u4ea4\u6613\u8a18\u9304\u5099\u4efd\u3002\u9019\u78ba\u4fdd\u4e86\u8a18\u9304\u6301\u7e8c\u88ab\u622a\u65b7\u3001\u5b89\u5168\u52a0\u5bc6\u4e26\u5132\u5b58\u5728\u7570\u5730\u6216\u4e0d\u53ef\u8b8a\u7684\u96f2\u7aef\u5132\u5b58\u4e2d\uff0c\u5f9e\u800c\u9632\u6b62 <code>LOG_BACKUP<\/code> \u7b49\u5f85\u72c0\u614b\uff0c\u800c\u7121\u9700\u8907\u96dc\u7684\u81ea\u8a02 SQL Agent \u4f5c\u696d\u3002<\/p>\n<h3>2. \u8abf\u6574\u4ea4\u6613\u8a18\u9304\u5927\u5c0f\u4e26\u7ba1\u7406 VLF<\/h3>\n<p>\u4f9d\u8cf4\u81ea\u52d5\u6210\u9577\u4f86\u7ba1\u7406\u4ea4\u6613\u8a18\u9304\u5927\u5c0f\u662f\u4e00\u7a2e\u5371\u96aa\u7684\u53cd\u6a21\u5f0f\u3002\u81ea\u52d5\u6210\u9577\u4f5c\u696d\u6210\u672c\u9ad8\u6602\uff0c\u4e26\u4e14\u5728\u78c1\u789f\u521d\u59cb\u5316\u70ba\u96f6\u6642\u6703\u66ab\u505c\u4ea4\u6613\u8655\u7406\uff08\u9664\u975e\u555f\u7528\u4e86\u5373\u6642\u6a94\u6848\u521d\u59cb\u5316\uff0c\u4f46\u9019<em>\u4e0d\u9069\u7528\u65bc<\/em>\u8a18\u9304\u6a94\uff09\u3002<\/p>\n<p>\u6b64\u5916\uff0c\u983b\u7e41\u4e14\u5c0f\u5e45\u5ea6\u7684\u81ea\u52d5\u6210\u9577\uff08\u4f8b\u5982\u6bcf\u6b21\u6210\u9577 10% \u6216 50MB\uff09\u6703\u5c0e\u81f4 <strong>VLF \u5206\u6563<\/strong>\u3002\u64c1\u6709\u6578\u5343\u500b\u5fae\u5c0f VLF \u7684\u4ea4\u6613\u8a18\u9304\u6703\u56b4\u91cd\u964d\u4f4e\u8cc7\u6599\u5eab\u555f\u52d5\u6642\u9593\u3001\u5099\u4efd\u6548\u80fd\u548c\u8907\u5beb\u5ef6\u9072\u3002<\/p>\n<ul>\n<li><strong>\u9810\u5148\u8a2d\u5b9a\u8a18\u9304\u5927\u5c0f\uff1a<\/strong>\u5206\u6790\u60a8\u6700\u5927\u7684\u7dad\u8b77\u4f5c\u696d\uff08\u5982\u7d22\u5f15\u91cd\u5efa\uff09\uff0c\u4e26\u9810\u5148\u8a2d\u5b9a LDF \u6a94\u6848\u5927\u5c0f\u4ee5\u5bb9\u7d0d\u5b83\u5011\uff0c\u800c\u7121\u9700\u6210\u9577\u3002<\/li>\n<li><strong>\u8a2d\u5b9a\u56fa\u5b9a\u81ea\u52d5\u6210\u9577\uff1a<\/strong>\u5c07\u81ea\u52d5\u6210\u9577\u5f9e\u767e\u5206\u6bd4\u8b8a\u66f4\u70ba\u56fa\u5b9a\u5927\u5c0f\uff08\u4f8b\u5982 1GB \u6216 5GB\uff09\uff0c\u4ee5\u78ba\u4fdd VLF \u4ee5\u9069\u7576\u7684\u5927\u5c0f\u5efa\u7acb\u3002<\/li>\n<\/ul>\n<p>\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\u6aa2\u67e5\u60a8\u7684 VLF \u6578\u91cf\uff08\u9069\u7528\u65bc SQL Server 2017+\uff09\uff1a<\/p>\n<pre><code class=\"language-sql\">SELECT \n    db_name(database_id) AS DatabaseName,\n    COUNT(vlf_sequence_number) AS VLF_Count\nFROM sys.dm_db_log_info(DB_ID('YourDatabaseName'));\n<\/code><\/pre>\n<p>\u5982\u679c\u60a8\u7684 VLF \u6578\u91cf\u8d85\u904e 500\uff0c\u8acb\u8003\u616e\u5728\u5b89\u975c\u6642\u6bb5\uff0c\u5c07\u8a18\u9304\u58d3\u7e2e\u81f3\u6700\u5c0f\u5927\u5c0f\uff0c\u7136\u5f8c\u624b\u52d5\u5c07\u5176\u5206\u6279\u64f4\u5145\u56de\u6240\u9700\u5927\u5c0f\u3002<\/p>\n<h3>3. \u512a\u5316\u7d22\u5f15\u7dad\u8b77\u4f5c\u696d<\/h3>\n<p>\u7d22\u5f15\u91cd\u5efa\u662f\u5b8c\u5168\u8a18\u9304\u7684\u4f5c\u696d\uff0c\u5373\u4f7f\u5728\u5927\u91cf\u8a18\u9304\u5fa9\u539f\u6a21\u5f0f\u4e0b\u4e5f\u662f\u5982\u6b64\uff08\u53d6\u6c7a\u65bc\u7d22\u5f15\u985e\u578b\uff09\u3002\u91cd\u5efa 500GB \u7684\u7d22\u5f15\u81f3\u5c11\u6703\u7522\u751f 500GB \u7684\u4ea4\u6613\u8a18\u9304\u3002<\/p>\n<p>\u70ba\u4e86\u6e1b\u8f15\u7dad\u8b77\u671f\u9593\u7684\u8a18\u9304\u81a8\u8139\uff1a<br \/>\n*   \u91cd\u5efa\u7d22\u5f15\u6642\u4f7f\u7528 <code>SORT_IN_TEMPDB = ON<\/code>\u3002\u9019\u6703\u5c07\u6392\u5e8f\u968e\u6bb5\u5378\u8f09\u5230 TempDB\uff0c\u5f9e\u800c\u6e1b\u8f15\u4f7f\u7528\u8005\u8cc7\u6599\u5eab\u4ea4\u6613\u8a18\u9304\u7684\u8ca0\u64d4\u3002<br \/>\n*   \u76e1\u53ef\u80fd\u5f9e\u7d22\u5f15<em>\u91cd\u5efa<\/em>\u5207\u63db\u70ba\u7d22\u5f15<em>\u91cd\u7d44<\/em>\uff0c\u56e0\u70ba\u91cd\u7d44\u7684\u8a18\u9304\u6548\u7387\u66f4\u9ad8\uff0c\u4e14\u53ef\u4ee5\u5728\u4e0d\u5fa9\u539f\u6574\u500b\u4f5c\u696d\u7684\u60c5\u6cc1\u4e0b\u4e2d\u65b7\u3002<br \/>\n*   \u6279\u6b21\u8655\u7406\u5927\u578b <code>DELETE<\/code> \u6216 <code>UPDATE<\/code> \u4f5c\u696d\u3002\u8207\u5176\u5728\u4e00\u500b\u4ea4\u6613\u4e2d\u522a\u9664 1000 \u842c\u884c\uff0c\u4e0d\u5982\u4ee5 50,000 \u884c\u70ba\u4e00\u6279\u9032\u884c\u522a\u9664\uff0c\u4e26\u5728\u6279\u6b21\u4e4b\u9593\u63d0\u4ea4\uff0c\u5141\u8a31\u8a18\u9304\u5099\u4efd\u622a\u65b7\u8a18\u9304\u3002<\/p>\n<h3>4. \u76e3\u63a7\u9ad8\u53ef\u7528\u6027\u8207\u8907\u5beb\u62d3\u64b2<\/h3>\n<p>\u5728 AlwaysOn \u53ef\u7528\u6027\u7fa4\u7d44\u4e2d\uff0c\u4e3b\u8981\u8907\u672c\u5728\u8a18\u9304\u8a18\u9304\u5df2\u5728\u6240\u6709\u540c\u6b65\u548c\u975e\u540c\u6b65\u6b21\u8981\u8907\u672c\u4e0a\u5b8c\u6210\u5beb\u5165\u4e4b\u524d\uff0c\u7121\u6cd5\u622a\u65b7\u5176\u8a18\u9304\u3002<\/p>\n<p>\u5982\u679c\u6b21\u8981\u8907\u672c\u96e2\u7dda\uff0c\u6216\u8005\u7db2\u8def\u983b\u5bec\u7121\u6cd5\u8ddf\u4e0a\u4e3b\u8981\u8907\u672c\u7684\u4ea4\u6613\u7522\u751f\u7387\uff0c\u4e3b\u8981\u8907\u672c\u7684\u50b3\u9001\u4f47\u5217\u5c07\u6703\u589e\u52a0\uff0c\u8a18\u9304\u5c07\u6703\u586b\u6eff (<code>AVAILABILITY_REPLICA<\/code> \u7b49\u5f85\u985e\u578b)\u3002<\/p>\n<p>\u91dd\u5c0d <code>SQLServer:Replica &gt; Log Send Queue<\/code> \u6548\u80fd\u8a08\u6578\u5668\u5be6\u65bd\u5f37\u5927\u7684\u76e3\u63a7\u3002\u5982\u679c\u6b21\u8981\u8907\u672c\u6c38\u4e45\u907a\u5931\uff0c\u60a8\u5fc5\u9808\u5c07\u5176\u5f9e\u53ef\u7528\u6027\u7fa4\u7d44\u4e2d\u79fb\u9664\u6216\u66ab\u505c\u8cc7\u6599\u79fb\u52d5\uff0c\u4ee5\u5141\u8a31\u4e3b\u8981\u8a18\u9304\u9032\u884c\u622a\u65b7\u3002<\/p>\n<h2>\u7d50\u8ad6<\/h2>\n<p>\u9047\u5230\u4ea4\u6613\u8a18\u9304\u5df2\u6eff\u662f\u8cc7\u6599\u5eab\u7ba1\u7406\u54e1\u7684\u5fc5\u7d93\u4e4b\u8def\uff0c\u4f46\u9019\u4e0d\u4e00\u5b9a\u6703\u5c0e\u81f4\u9577\u6642\u9593\u7684\u505c\u6a5f\u3002\u900f\u904e\u4e86\u89e3\u9810\u5beb\u5f0f\u8a18\u9304\u548c VLF \u7684\u6a5f\u5236\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528 <code>sys.databases<\/code> 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Learn rapid recovery techniques, VLF management, and architectural best practices for DBAs.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"rank_math_title":"MSSQL Transaction Log Full: Prevention & Recovery","rank_math_description":"** Discover expert strategies for preventing and resolving MSSQL transaction log full errors (Error 9002). 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