{"id":5887,"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":"2026-06-16T16:39:46","modified_gmt":"2026-06-16T16:39:46","slug":"mssql-%e4%ba%8b%e5%8a%a1%e6%97%a5%e5%bf%97%e5%b7%b2%e6%bb%a1-%e9%a2%84%e9%98%b2%e4%b8%8e%e5%bf%ab%e9%80%9f%e6%81%a2%e5%a4%8d%e7%ad%96%e7%95%a5","status":"publish","type":"post","link":"https:\/\/cloudsave.app\/zh-hans\/knowledge-base\/mssql-%e4%ba%8b%e5%8a%a1%e6%97%a5%e5%bf%97%e5%b7%b2%e6%bb%a1-%e9%a2%84%e9%98%b2%e4%b8%8e%e5%bf%ab%e9%80%9f%e6%81%a2%e5%a4%8d%e7%ad%96%e7%95%a5\/","title":{"rendered":"MSSQL \u4e8b\u52a1\u65e5\u5fd7\u5df2\u6ee1\uff1a\u9884\u9632\u4e0e\u5feb\u901f\u6062\u590d\u7b56\u7565"},"content":{"rendered":"<p>\u5bf9\u4e8e\u7ba1\u7406 Microsoft SQL Server \u7684\u6570\u636e\u5e93\u7ba1\u7406\u5458 (DBA) \u548c DevOps \u5de5\u7a0b\u5e08\u6765\u8bf4\uff0c\u5f88\u5c11\u6709\u8b66\u62a5\u80fd\u50cf\u9519\u8bef 9002 \u90a3\u6837\u5f15\u8d77\u5982\u6b64\u76f4\u63a5\u7684\u7126\u8651\uff1a<em>\u6570\u636e\u5e93 &#8216;X&#8217; \u7684\u4e8b\u52a1\u65e5\u5fd7\u5df2\u6ee1<\/em>\u3002\u5f53\u4e8b\u52a1\u65e5\u5fd7\u586b\u6ee1\u4e14\u65e0\u6cd5\u589e\u957f\u65f6\uff0c\u6570\u636e\u5e93\u5b9e\u9645\u4e0a\u4f1a\u53d8\u4e3a\u53ea\u8bfb\u72b6\u6001\u3002\u6240\u6709\u7684 <code>INSERT<\/code>\u3001<code>UPDATE<\/code> \u548c <code>DELETE<\/code> \u64cd\u4f5c\u90fd\u4f1a\u505c\u6b62\uff0c\u5e94\u7528\u7a0b\u5e8f\u4e8b\u52a1\u4f1a\u5931\u8d25\uff0c\u751f\u4ea7\u73af\u5883\u4e5f\u4f1a\u9677\u5165\u505c\u6ede\u3002<\/p>\n<p>\u4e86\u89e3 SQL Server \u4e8b\u52a1\u65e5\u5fd7\u7684\u5e95\u5c42\u67b6\u6784\u3001\u51c6\u786e\u8bca\u65ad\u6839\u672c\u539f\u56e0\u5e76\u6267\u884c\u5feb\u901f\u6062\u590d\u7a0b\u5e8f\uff0c\u662f\u7ef4\u6301\u9ad8\u53ef\u7528\u6027\u7684\u5173\u952e\u6280\u80fd\u3002\u672c\u7efc\u5408\u6307\u5357\u63a2\u8ba8\u4e86\u4e8b\u52a1\u65e5\u5fd7\u7684\u673a\u5236\u3001\u5982\u4f55\u5728\u7d27\u6025\u60c5\u51b5\u4e0b\u89e3\u51b3\u65e5\u5fd7\u5df2\u6ee1\u95ee\u9898\uff0c\u4ee5\u53ca\u9632\u6b62\u6b64\u7c7b\u95ee\u9898\u518d\u6b21\u53d1\u751f\u7684\u67b6\u6784\u6700\u4f73\u5b9e\u8df5\u3002<\/p>\n<h2>\u4e86\u89e3 SQL Server \u4e8b\u52a1\u65e5\u5fd7\u67b6\u6784<\/h2>\n<p>\u8981\u6709\u6548\u5730\u6392\u67e5\u4e8b\u52a1\u65e5\u5fd7\u5df2\u6ee1\u7684\u95ee\u9898\uff0c\u5fc5\u987b\u9996\u5148\u4e86\u89e3 SQL Server \u5982\u4f55\u5199\u5165\u548c\u7ba1\u7406\u6570\u636e\u3002<\/p>\n<h3>\u9884\u5199\u5f0f\u65e5\u5fd7 (WAL)<\/h3>\n<p>SQL Server \u4f7f\u7528\u9884\u5199\u5f0f\u65e5\u5fd7 (WAL) \u534f\u8bae\u3002\u6bcf\u5f53\u53d1\u751f\u6570\u636e\u4fee\u6539\u65f6\uff0c\u66f4\u6539\u9996\u5148\u88ab\u5199\u5165\u5185\u5b58\u4e2d\u7684\u4e8b\u52a1\u65e5\u5fd7\uff0c\u7136\u540e\u5728\u5b9e\u9645\u6570\u636e\u9875\u5728\u6570\u636e\u5e93\u6587\u4ef6 (MDF\/NDF) \u4e2d\u66f4\u65b0\u4e4b\u524d\uff0c\u5237\u65b0\u5230\u78c1\u76d8\u4e0a\u7684\u7269\u7406\u65e5\u5fd7\u6587\u4ef6\u4e2d\u3002\u8fd9\u4fdd\u8bc1\u4e86 ACID\uff08\u539f\u5b50\u6027\u3001\u4e00\u81f4\u6027\u3001\u9694\u79bb\u6027\u3001\u6301\u4e45\u6027\uff09\u5408\u89c4\u6027\uff0c\u786e\u4fdd\u5728\u53d1\u751f\u5d29\u6e83\u65f6\uff0cSQL Server \u53ef\u4ee5\u91cd\u653e\uff08\u524d\u6eda\uff09\u6216\u64a4\u6d88\uff08\u56de\u6eda\uff09\u4e8b\u52a1\u3002<\/p>\n<h3>\u865a\u62df\u65e5\u5fd7\u6587\u4ef6 (VLF) \u548c\u5faa\u73af\u65e5\u5fd7\u8bb0\u5f55<\/h3>\n<p>\u5728\u5185\u90e8\uff0c\u7269\u7406\u4e8b\u52a1\u65e5\u5fd7\u6587\u4ef6 (LDF) \u88ab\u5212\u5206\u4e3a\u66f4\u5c0f\u7684\u903b\u8f91\u6bb5\uff0c\u79f0\u4e3a\u865a\u62df\u65e5\u5fd7\u6587\u4ef6 (VLF)\u3002\u4e8b\u52a1\u65e5\u5fd7\u4ee5\u5faa\u73af\u65b9\u5f0f\u8fd0\u884c\u3002\u968f\u7740\u65e5\u5fd7\u8bb0\u5f55\u7684\u5199\u5165\uff0c\u5b83\u4eec\u4f1a\u586b\u6ee1\u4e00\u4e2a VLF \u5e76\u79fb\u52a8\u5230\u4e0b\u4e00\u4e2a\u3002<\/p>\n<p>\u5f53\u65e5\u5fd7\u5230\u8fbe\u7269\u7406\u6587\u4ef6\u7684\u672b\u5c3e\u65f6\uff0c\u5b83\u4f1a\u5c1d\u8bd5\u7ed5\u56de\u5230\u5f00\u5934\u3002\u4f46\u662f\uff0c\u53ea\u6709\u5f53 VLF \u88ab\u6807\u8bb0\u4e3a<strong>\u975e\u6d3b\u52a8 (inactive)<\/strong> \u65f6\uff0c\u5b83\u624d\u80fd\u8986\u76d6\u8be5 VLF\u3002\u5982\u679c\u6240\u6709 VLF \u90fd\u662f\u6d3b\u52a8\u7684\uff08\u610f\u5473\u7740\u5b83\u4eec\u5305\u542b SQL Server \u4ecd\u9700\u8981\u7684\u65e5\u5fd7\u8bb0\u5f55\uff09\uff0c\u5219\u65e5\u5fd7\u65e0\u6cd5\u5faa\u73af\u3002\u5982\u679c\u542f\u7528\u4e86\u81ea\u52a8\u589e\u957f\u4e14\u78c1\u76d8\u7a7a\u95f4\u53ef\u7528\uff0c\u7269\u7406\u6587\u4ef6\u4f1a\u589e\u957f\u3002\u5982\u679c\u78c1\u76d8\u5df2\u6ee1\u6216\u9650\u5236\u4e86\u81ea\u52a8\u589e\u957f\uff0c\u60a8\u5c31\u4f1a\u9047\u5230\u9519\u8bef 9002\u3002<\/p>\n<h3>\u65e5\u5fd7\u622a\u65ad\u4e0e\u65e5\u5fd7\u6536\u7f29<\/h3>\n<p>\u4e00\u4e2a\u5e38\u89c1\u7684\u8bef\u89e3\u662f\u622a\u65ad\u65e5\u5fd7\u4f1a\u51cf\u5c0f\u7269\u7406\u6587\u4ef6\u7684\u5927\u5c0f\u3002<br \/>\n*   <strong>\u65e5\u5fd7\u622a\u65ad\uff1a<\/strong> \u5c06\u6d3b\u52a8 VLF \u6807\u8bb0\u4e3a\u975e\u6d3b\u52a8\u7684\u8fc7\u7a0b\uff0c\u4f7f\u7a7a\u95f4\u53ef\u4f9b\u91cd\u7528\u3002\u5b83<em>\u4e0d\u4f1a<\/em>\u51cf\u5c0f\u78c1\u76d8\u4e0a LDF \u6587\u4ef6\u7684\u5927\u5c0f\u3002<br \/>\n*   <strong>\u65e5\u5fd7\u6536\u7f29\uff1a<\/strong> \u7269\u7406\u51cf\u5c0f LDF \u6587\u4ef6\u5927\u5c0f\u5e76\u5c06\u7a7a\u95f4\u8fd4\u56de\u7ed9\u64cd\u4f5c\u7cfb\u7edf\u7684\u8fc7\u7a0b\u3002<\/p>\n<p>\u5728\u5b8c\u6574\u6062\u590d\u6a21\u5f0f\u4e0b\uff0c<em>\u53ea\u6709<\/em>\u5728\u6210\u529f\u5b8c\u6210\u4e8b\u52a1\u65e5\u5fd7\u5907\u4efd\u65f6\u624d\u4f1a\u53d1\u751f\u65e5\u5fd7\u622a\u65ad\uff08\u5047\u8bbe\u6ca1\u6709\u5176\u4ed6\u8fdb\u7a0b\u4fdd\u6301\u65e5\u5fd7\u5904\u4e8e\u6d3b\u52a8\u72b6\u6001\uff09\u3002<\/p>\n<h2>\u8bca\u65ad\u201c\u4e8b\u52a1\u65e5\u5fd7\u5df2\u6ee1\u201d\u9519\u8bef\uff08\u9519\u8bef 9002\uff09<\/h2>\n<p>\u5f53\u65e5\u5fd7\u5df2\u6ee1\u65f6\uff0c\u60a8\u7684\u7b2c\u4e00\u6b65\u4e0d\u5e94\u8be5\u662f\u76f2\u76ee\u5730\u589e\u52a0\u78c1\u76d8\u7a7a\u95f4\u6216\u6536\u7f29\u6587\u4ef6\u3002\u60a8\u5fc5\u987b\u786e\u5b9a<em>\u4e3a\u4ec0\u4e48<\/em>\u65e5\u5fd7\u65e0\u6cd5\u622a\u65ad\u3002SQL Server \u63d0\u4f9b\u4e86\u4e00\u79cd\u5185\u7f6e\u673a\u5236\uff0c\u901a\u8fc7 <code>sys.databases<\/code> \u76ee\u5f55\u89c6\u56fe\u6765\u544a\u8bc9\u60a8\u7a76\u7adf\u662f\u4ec0\u4e48\u963b\u6b62\u4e86\u65e5\u5fd7\u91cd\u7528\u3002<\/p>\n<p>\u8fd0\u884c\u4ee5\u4e0b T-SQL \u547d\u4ee4\u6765\u8bc6\u522b\u74f6\u9888\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\u8fd8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u68c0\u67e5\u4e8b\u52a1\u65e5\u5fd7\u7684\u5f53\u524d\u7a7a\u95f4\u4f7f\u7528\u60c5\u51b5\uff1a<\/p>\n<pre><code class=\"language-sql\">DBCC SQLPERF(LOGSPACE);\n<\/code><\/pre>\n<h3>\u5e38\u89c1\u7684 <code>log_reuse_wait_desc<\/code> \u72b6\u6001<\/h3>\n<ol>\n<li><strong>LOG_BACKUP\uff1a<\/strong> \u6570\u636e\u5e93\u5904\u4e8e\u5b8c\u6574\u6216\u5927\u5bb9\u91cf\u65e5\u5fd7\u6062\u590d\u6a21\u5f0f\uff0c\u4e14\u6700\u8fd1\u672a\u8fdb\u884c\u4e8b\u52a1\u65e5\u5fd7\u5907\u4efd\u3002\u8fd9\u662f\u6700\u5e38\u89c1\u7684\u539f\u56e0\u3002<\/li>\n<li><strong>ACTIVE_TRANSACTION\uff1a<\/strong> \u4e00\u4e2a\u957f\u65f6\u95f4\u8fd0\u884c\u7684\u4e8b\u52a1\uff08\u4f8b\u5982\uff0c\u5927\u89c4\u6a21\u7d22\u5f15\u91cd\u5efa\u6216\u88ab\u9057\u5fd8\u7684\u672a\u63d0\u4ea4\u4e8b\u52a1\uff09\u6b63\u5728\u4fdd\u6301\u65e5\u5fd7\u5904\u4e8e\u6d3b\u52a8\u72b6\u6001\u3002<\/li>\n<li><strong>REPLICATION \/ CDC\uff1a<\/strong> \u542f\u7528\u4e86\u4e8b\u52a1\u590d\u5236\u6216\u53d8\u66f4\u6570\u636e\u6355\u83b7 (CDC)\uff0c\u4e14\u65e5\u5fd7\u8bfb\u53d6\u5668\u4ee3\u7406\u5c1a\u672a\u5904\u7406\u8fd9\u4e9b\u4e8b\u52a1\u3002<\/li>\n<li><strong>AVAILABILITY_REPLICA\uff1a<\/strong> \u5728 AlwaysOn \u53ef\u7528\u6027\u7ec4\u4e2d\uff0c\u8f85\u52a9\u526f\u672c\u5df2\u65ad\u5f00\u8fde\u63a5\u6216\u540c\u6b65\u901f\u5ea6\u592a\u6162\uff0c\u8feb\u4f7f\u4e3b\u526f\u672c\u4fdd\u7559\u65e5\u5fd7\u8bb0\u5f55\uff0c\u76f4\u5230\u5b83\u4eec\u5728\u8f85\u52a9\u526f\u672c\u4e0a\u56fa\u5316\u3002<\/li>\n<\/ol>\n<h2>\u5feb\u901f\u6062\u590d\u7b56\u7565\uff1a\u5728\u751f\u4ea7\u73af\u5883\u4e2d\u89e3\u51b3\u95ee\u9898<\/h2>\n<p>\u6839\u636e\u8fd4\u56de\u7684 <code>log_reuse_wait_desc<\/code>\uff0c\u60a8\u7684\u5e94\u6025\u54cd\u5e94\u4f1a\u6709\u6240\u4e0d\u540c\u3002\u4ee5\u4e0b\u662f\u9488\u5bf9\u6700\u5e38\u89c1\u573a\u666f\u7684\u5feb\u901f\u6062\u590d\u7b56\u7565\u3002<\/p>\n<h3>\u573a\u666f 1\uff1a\u7f3a\u5c11\u6216\u5931\u8d25\u7684\u65e5\u5fd7\u5907\u4efd (<code>LOG_BACKUP<\/code>)<\/h3>\n<p>\u5982\u679c\u7b49\u5f85\u7c7b\u578b\u4e3a <code>LOG_BACKUP<\/code>\uff0c\u89e3\u51b3\u65b9\u6848\u5f88\u7b80\u5355\uff1a\u60a8\u5fc5\u987b\u5907\u4efd\u4e8b\u52a1\u65e5\u5fd7\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>\u5907\u4efd\u5b8c\u6210\u540e\uff0c\u975e\u6d3b\u52a8\u7684 VLF \u5c06\u88ab\u622a\u65ad\uff0cSQL Server \u5c06\u6062\u590d\u6b63\u5e38\u64cd\u4f5c\u3002\u5982\u679c\u60a8\u7684\u5907\u4efd\u9a71\u52a8\u5668\u5df2\u6ee1\uff0c\u60a8\u53ef\u80fd\u9700\u8981\u5907\u4efd\u5230\u4e34\u65f6\u7f51\u7edc\u5171\u4eab\u6216\u7a7a\u8bbe\u5907\uff08\u9664\u975e\u6570\u636e\u5e93\u5f88\u5bb9\u6613\u91cd\u65b0\u521b\u5efa\uff0c\u5426\u5219\u5f3a\u70c8\u4e0d\u5efa\u8bae\u8fd9\u6837\u505a\uff0c\u56e0\u4e3a\u5b83\u4f1a\u7834\u574f\u65e5\u5fd7\u94fe\uff09\uff1a<\/p>\n<pre><code class=\"language-sql\">-- \u8b66\u544a\uff1a\u8fd9\u4f1a\u7834\u574f\u65e5\u5fd7\u94fe\u5e76\u635f\u5bb3\u65f6\u95f4\u70b9\u6062\u590d\u3002\n-- \u4ec5\u5728\u7edd\u5bf9\u5fc5\u8981\u65f6\u4f7f\u7528\uff0c\u5e76\u7acb\u5373\u6267\u884c\u5b8c\u6574\u5907\u4efd\u3002\nBACKUP LOG [YourDatabaseName] TO DISK = 'NUL';\n<\/code><\/pre>\n<h3>\u573a\u666f 2\uff1a\u957f\u65f6\u95f4\u8fd0\u884c\u7684\u6d3b\u52a8\u4e8b\u52a1 (<code>ACTIVE_TRANSACTION<\/code>)<\/h3>\n<p>\u5982\u679c\u5355\u4e2a\u4e8b\u52a1\u5df2\u7ecf\u8fd0\u884c\u4e86\u6570\u5c0f\u65f6\uff0c\u5b83\u4f1a\u963b\u6b62\u6574\u4e2a\u671f\u95f4\u7684\u65e5\u5fd7\u622a\u65ad\u3002\u9996\u5148\uff0c\u8bc6\u522b\u6709\u95ee\u9898\u7684\u4e8b\u52a1\uff1a<\/p>\n<pre><code class=\"language-sql\">DBCC OPENTRAN('YourDatabaseName');\n<\/code><\/pre>\n<p>\u6b64\u547d\u4ee4\u8fd4\u56de\u6700\u65e9\u7684\u6d3b\u52a8\u4e8b\u52a1\u53ca\u5176\u670d\u52a1\u5668\u8fdb\u7a0b ID (SPID)\u3002\u60a8\u53ef\u4ee5\u901a\u8fc7\u67e5\u8be2\u52a8\u6001\u7ba1\u7406\u89c6\u56fe (DMV) \u6765\u6536\u96c6\u6709\u5173\u8be5 SPID \u6b63\u5728\u6267\u884c\u7684\u64cd\u4f5c\u7684\u66f4\u591a\u8be6\u7ec6\u4fe1\u606f\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\u8be5\u4e8b\u52a1\u662f\u5f02\u5e38\u67e5\u8be2\u6216\u505c\u6ede\u7684\u8fdb\u7a0b\uff0c\u60a8\u53ef\u80fd\u9700\u8981\u7ec8\u6b62\u5b83\u4ee5\u91ca\u653e\u65e5\u5fd7\u3002<\/p>\n<pre><code class=\"language-sql\">KILL &lt;SPID&gt;;\n<\/code><\/pre>\n<p><em>\u6ce8\u610f\uff1a\u7ec8\u6b62\u5927\u89c4\u6a21\u4e8b\u52a1\u5c06\u89e6\u53d1\u56de\u6eda\uff0c\u8fd9\u53ef\u80fd\u9700\u8981\u5927\u91cf\u65f6\u95f4\uff0c\u5e76\u4f1a\u6682\u65f6\u4ea7\u751f\u989d\u5916\u7684\u65e5\u5fd7\u6d3b\u52a8\u3002\u5728\u56de\u6eda\u671f\u95f4\u4e0d\u8981\u91cd\u542f SQL Server \u670d\u52a1\uff0c\u5426\u5219\u6570\u636e\u5e93\u5728\u91cd\u542f\u65f6\u5c06\u8fdb\u5165\u6062\u590d\u6a21\u5f0f\u3002<\/em><\/p>\n<h3>\u573a\u666f 3\uff1a\u7d27\u6025\u7a7a\u95f4\u5206\u914d\uff08\u78c1\u76d8\u5df2 100% \u6ee1\uff09<\/h3>\n<p>\u5982\u679c LDF \u6587\u4ef6\u5df2\u5360\u6ee1\u6574\u4e2a\u9a71\u52a8\u5668\uff0c\u60a8\u751a\u81f3\u65e0\u6cd5\u8fd0\u884c\u5907\u4efd\uff0c\u56e0\u4e3a SQL Server \u9700\u8981\u5c11\u91cf\u7684\u65e5\u5fd7\u7a7a\u95f4\u6765\u8bb0\u5f55\u5907\u4efd\u4e8b\u4ef6\u672c\u8eab\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u60a8\u5fc5\u987b\u5728\u5177\u6709\u53ef\u7528\u7a7a\u95f4\u7684\u53e6\u4e00\u4e2a\u9a71\u52a8\u5668\u4e0a\u6dfb\u52a0\u8f85\u52a9\u65e5\u5fd7\u6587\u4ef6\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>\u8fd9\u7acb\u5373\u4e3a SQL Server \u63d0\u4f9b\u4e86\u5598\u606f\u7a7a\u95f4\u3002\u4e00\u65e6\u6570\u636e\u5e93\u8054\u673a\uff0c\u8bf7\u6267\u884c\u4e8b\u52a1\u65e5\u5fd7\u5907\u4efd\uff0c\u6e05\u7a7a\u8f85\u52a9\u65e5\u5fd7\u6587\u4ef6\uff0c\u7136\u540e\u5c06\u5176\u5220\u9664\uff1a<\/p>\n<pre><code class=\"language-sql\">-- 1. \u6267\u884c\u65e5\u5fd7\u5907\u4efd\u4ee5\u622a\u65ad\u65e5\u5fd7\nBACKUP LOG [YourDatabaseName] TO DISK = '...';\n\n-- 2. \u6e05\u7a7a\u4e34\u65f6\u65e5\u5fd7\u6587\u4ef6\nDBCC SHRINKFILE (N'YourDatabaseName_Log2', EMPTYFILE);\n\n-- 3. \u5220\u9664\u4e34\u65f6\u65e5\u5fd7\u6587\u4ef6\nALTER DATABASE [YourDatabaseName] REMOVE FILE [YourDatabaseName_Log2];\n<\/code><\/pre>\n<h2>\u9884\u9632\u548c\u7ba1\u7406\u4e8b\u52a1\u65e5\u5fd7\u7684\u6700\u4f73\u5b9e\u8df5<\/h2>\n<p>\u88ab\u52a8\u6392\u67e5\u6545\u969c\u538b\u529b\u5de8\u5927\u4e14\u4f1a\u5f71\u54cd SLA\u3002\u5b9e\u65bd\u4e3b\u52a8\u7684\u67b6\u6784\u548c\u8fd0\u8425\u6700\u4f73\u5b9e\u8df5\u5bf9\u4e8e\u4f01\u4e1a\u6570\u636e\u5e93\u7684\u7a33\u5b9a\u6027\u81f3\u5173\u91cd\u8981\u3002<\/p>\n<h3>1. \u5b9e\u65bd\u7a33\u5065\u7684\u81ea\u52a8\u5316\u5907\u4efd\u7b56\u7565<\/h3>\n<p>\u5982\u679c\u6570\u636e\u5e93\u5904\u4e8e\u5b8c\u6574\u6062\u590d\u6a21\u5f0f\uff0c\u5219\u5fc5\u987b\u9891\u7e41\u8fdb\u884c\u4e8b\u52a1\u65e5\u5fd7\u5907\u4efd\u3002\u6839\u636e\u60a8\u7684\u6062\u590d\u70b9\u76ee\u6807 (RPO) \u548c\u4e8b\u52a1\u91cf\uff0c\u65e5\u5fd7\u5907\u4efd\u5e94\u6bcf 5 \u5230 15 \u5206\u949f\u8fdb\u884c\u4e00\u6b21\u3002<\/p>\n<p>\u50cf CloudSave \u8fd9\u6837\u7684\u4f01\u4e1a\u7ea7\u5907\u4efd\u89e3\u51b3\u65b9\u6848\u6781\u5927\u5730\u7b80\u5316\u4e86\u6b64\u8fc7\u7a0b\u3002\u901a\u8fc7\u5229\u7528 VDI\uff08\u865a\u62df\u8bbe\u5907\u63a5\u53e3\uff09\u76f4\u63a5\u4e0e SQL Server \u96c6\u6210\uff0cCloudSave \u5141\u8bb8 DBA \u914d\u7f6e\u7b56\u7565\u9a71\u52a8\u7684\u9ad8\u9891\u4e8b\u52a1\u65e5\u5fd7\u5907\u4efd\u3002\u8fd9\u786e\u4fdd\u4e86\u65e5\u5fd7\u88ab\u6301\u7eed\u622a\u65ad\u3001\u5b89\u5168\u52a0\u5bc6\u5e76\u5b58\u50a8\u5728\u5f02\u5730\u6216\u4e0d\u53ef\u53d8\u7684\u4e91\u5b58\u50a8\u4e2d\uff0c\u4ece\u800c\u5728\u65e0\u9700\u590d\u6742\u7684\u81ea\u5b9a\u4e49 SQL Agent \u4f5c\u4e1a\u7684\u60c5\u51b5\u4e0b\u9632\u6b62 <code>LOG_BACKUP<\/code> \u7b49\u5f85\u72b6\u6001\u3002<\/p>\n<h3>2. \u5408\u7406\u8c03\u6574\u4e8b\u52a1\u65e5\u5fd7\u5927\u5c0f\u5e76\u7ba1\u7406 VLF<\/h3>\n<p>\u4f9d\u8d56\u81ea\u52a8\u589e\u957f\u6765\u7ba1\u7406\u4e8b\u52a1\u65e5\u5fd7\u5927\u5c0f\u662f\u4e00\u79cd\u5371\u9669\u7684\u53cd\u6a21\u5f0f\u3002\u81ea\u52a8\u589e\u957f\u64cd\u4f5c\u5f00\u9500\u5de8\u5927\uff0c\u5e76\u4e14\u5728\u78c1\u76d8\u88ab\u96f6\u521d\u59cb\u5316\u65f6\u4f1a\u6682\u505c\u4e8b\u52a1\u5904\u7406\uff08\u9664\u975e\u542f\u7528\u4e86\u5373\u65f6\u6587\u4ef6\u521d\u59cb\u5316\uff0c\u4f46\u8fd9<em>\u4e0d<\/em>\u9002\u7528\u4e8e\u65e5\u5fd7\u6587\u4ef6\uff09\u3002<\/p>\n<p>\u6b64\u5916\uff0c\u9891\u7e41\u7684\u5c0f\u89c4\u6a21\u81ea\u52a8\u589e\u957f\uff08\u4f8b\u5982\u6bcf\u6b21\u589e\u957f 10% \u6216 50MB\uff09\u4f1a\u5bfc\u81f4 <strong>VLF \u788e\u7247\u5316<\/strong>\u3002\u62e5\u6709\u6570\u5343\u4e2a\u5fae\u5c0f VLF \u7684\u4e8b\u52a1\u65e5\u5fd7\u4f1a\u4e25\u91cd\u964d\u4f4e\u6570\u636e\u5e93\u542f\u52a8\u65f6\u95f4\u3001\u5907\u4efd\u6027\u80fd\u548c\u590d\u5236\u5ef6\u8fdf\u3002<\/p>\n<ul>\n<li><strong>\u9884\u8bbe\u65e5\u5fd7\u5927\u5c0f\uff1a<\/strong> \u5206\u6790\u60a8\u6700\u5927\u7684\u7ef4\u62a4\u64cd\u4f5c\uff08\u5982\u7d22\u5f15\u91cd\u5efa\uff09\uff0c\u5e76\u9884\u8bbe LDF \u6587\u4ef6\u5927\u5c0f\u4ee5\u5bb9\u7eb3\u5b83\u4eec\uff0c\u800c\u65e0\u9700\u589e\u957f\u3002<\/li>\n<li><strong>\u8bbe\u7f6e\u56fa\u5b9a\u81ea\u52a8\u589e\u957f\uff1a<\/strong> \u5c06\u81ea\u52a8\u589e\u957f\u4ece\u767e\u5206\u6bd4\u66f4\u6539\u4e3a\u56fa\u5b9a\u5927\u5c0f\uff08\u4f8b\u5982 1GB \u6216 5GB\uff09\uff0c\u4ee5\u786e\u4fdd VLF \u4ee5\u5065\u5eb7\u7684\u5927\u5c0f\u521b\u5efa\u3002<\/li>\n<\/ul>\n<p>\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8be2\u68c0\u67e5\u60a8\u7684 VLF \u8ba1\u6570\uff08\u9002\u7528\u4e8e 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 \u8ba1\u6570\u8d85\u8fc7 500\uff0c\u8bf7\u8003\u8651\u5728\u5b89\u9759\u65f6\u6bb5\u5c06\u65e5\u5fd7\u6536\u7f29\u5230\u6700\u5c0f\u5927\u5c0f\uff0c\u7136\u540e\u624b\u52a8\u5c06\u5176\u5206\u5927\u5757\u589e\u957f\u56de\u6240\u9700\u5927\u5c0f\u3002<\/p>\n<h3>3. \u4f18\u5316\u7d22\u5f15\u7ef4\u62a4\u64cd\u4f5c<\/h3>\n<p>\u7d22\u5f15\u91cd\u5efa\u662f\u5b8c\u5168\u8bb0\u5f55\u7684\u64cd\u4f5c\uff0c\u5373\u4f7f\u5728\u5927\u5bb9\u91cf\u65e5\u5fd7\u6062\u590d\u6a21\u5f0f\u4e0b\u4e5f\u662f\u5982\u6b64\uff08\u53d6\u51b3\u4e8e\u7d22\u5f15\u7c7b\u578b\uff09\u3002\u91cd\u5efa 500GB \u7684\u7d22\u5f15\u81f3\u5c11\u4f1a\u4ea7\u751f 500GB \u7684\u4e8b\u52a1\u65e5\u5fd7\u8bb0\u5f55\u3002<\/p>\n<p>\u4e3a\u4e86\u51cf\u8f7b\u7ef4\u62a4\u671f\u95f4\u7684\u65e5\u5fd7\u81a8\u80c0\uff1a<br \/>\n*   \u5728\u91cd\u5efa\u7d22\u5f15\u65f6\u4f7f\u7528 <code>SORT_IN_TEMPDB = ON<\/code>\u3002\u8fd9\u4f1a\u5c06\u6392\u5e8f\u9636\u6bb5\u5378\u8f7d\u5230 TempDB\uff0c\u4ece\u800c\u51cf\u8f7b\u7528\u6237\u6570\u636e\u5e93\u4e8b\u52a1\u65e5\u5fd7\u7684\u8d1f\u62c5\u3002<br \/>\n*   \u5c3d\u53ef\u80fd\u5c06\u7d22\u5f15<em>\u91cd\u5efa<\/em>\u5207\u6362\u4e3a\u7d22\u5f15<em>\u91cd\u7ec4<\/em>\uff0c\u56e0\u4e3a\u91cd\u7ec4\u7684\u65e5\u5fd7\u6548\u7387\u66f4\u9ad8\uff0c\u5e76\u4e14\u53ef\u4ee5\u5728\u4e0d\u56de\u6eda\u6574\u4e2a\u64cd\u4f5c\u7684\u60c5\u51b5\u4e0b\u4e2d\u65ad\u3002<br \/>\n*   \u6279\u91cf\u5904\u7406\u5927\u578b <code>DELETE<\/code> \u6216 <code>UPDATE<\/code> \u64cd\u4f5c\u3002\u4e0e\u5176\u5728\u4e00\u4e2a\u4e8b\u52a1\u4e2d\u5220\u9664 1000 \u4e07\u884c\uff0c\u4e0d\u5982\u5206\u6279\u5220\u9664\uff08\u6bcf\u6279 5 \u4e07\u884c\uff09\uff0c\u5e76\u5728\u6279\u6b21\u4e4b\u95f4\u63d0\u4ea4\u5e76\u5141\u8bb8\u65e5\u5fd7\u5907\u4efd\u622a\u65ad\u65e5\u5fd7\u3002<\/p>\n<h3>4. \u76d1\u63a7\u9ad8\u53ef\u7528\u6027\u548c\u590d\u5236\u62d3\u6251<\/h3>\n<p>\u5728 AlwaysOn \u53ef\u7528\u6027\u7ec4\u4e2d\uff0c\u4e3b\u526f\u672c\u5728\u65e5\u5fd7\u8bb0\u5f55\u5728\u6240\u6709\u540c\u6b65\u548c\u5f02\u6b65\u8f85\u52a9\u526f\u672c\u4e0a\u56fa\u5316\u4e4b\u524d\uff0c\u65e0\u6cd5\u622a\u65ad\u5176\u65e5\u5fd7\u3002<\/p>\n<p>\u5982\u679c\u8f85\u52a9\u526f\u672c\u8131\u673a\uff0c\u6216\u8005\u7f51\u7edc\u5e26\u5bbd\u65e0\u6cd5\u8ddf\u4e0a\u4e3b\u526f\u672c\u7684\u4e8b\u52a1\u751f\u6210\u901f\u7387\uff0c\u4e3b\u526f\u672c\u7684\u53d1\u9001\u961f\u5217\u5c06\u4f1a\u589e\u957f\uff0c\u65e5\u5fd7\u4e5f\u4f1a\u586b\u6ee1 (<code>AVAILABILITY_REPLICA<\/code> \u7b49\u5f85\u7c7b\u578b)\u3002<\/p>\n<p>\u4e3a <code>SQLServer:Replica &gt; Log Send Queue<\/code> \u6027\u80fd\u8ba1\u6570\u5668\u5b9e\u65bd\u7a33\u5065\u7684\u76d1\u63a7\u3002\u5982\u679c\u8f85\u52a9\u526f\u672c\u6c38\u4e45\u4e22\u5931\uff0c\u60a8\u5fc5\u987b\u5c06\u5176\u4ece\u53ef\u7528\u6027\u7ec4\u4e2d\u5220\u9664\u6216\u6682\u505c\u6570\u636e\u79fb\u52a8\uff0c\u4ee5\u5141\u8bb8\u4e3b\u65e5\u5fd7\u622a\u65ad\u3002<\/p>\n<h2>\u7ed3\u8bba<\/h2>\n<p>\u9047\u5230\u4e8b\u52a1\u65e5\u5fd7\u5df2\u6ee1\u662f\u6570\u636e\u5e93\u7ba1\u7406\u5458\u7684\u5fc5\u7ecf\u4e4b\u8def\uff0c\u4f46\u8fd9\u5e76\u4e0d\u4e00\u5b9a\u4f1a\u5bfc\u81f4\u957f\u65f6\u95f4\u7684\u505c\u673a\u3002\u901a\u8fc7\u4e86\u89e3\u9884\u5199\u5f0f\u65e5\u5fd7\u548c VLF \u7684\u673a\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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