{"id":5907,"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":"2026-06-16T16:54:01","modified_gmt":"2026-06-16T16:54:01","slug":"mssql-%ed%8a%b8%eb%9e%9c%ec%9e%ad%ec%85%98-%eb%a1%9c%ea%b7%b8-%ea%b0%80%eb%93%9d-%ec%b0%b8-%ec%98%88%eb%b0%a9-%eb%b0%8f-%ec%8b%a0%ec%86%8d%ed%95%9c-%eb%b3%b5%ea%b5%ac-%ec%a0%84%eb%9e%b5","status":"publish","type":"post","link":"https:\/\/cloudsave.app\/ko\/knowledge-base\/mssql-%ed%8a%b8%eb%9e%9c%ec%9e%ad%ec%85%98-%eb%a1%9c%ea%b7%b8-%ea%b0%80%eb%93%9d-%ec%b0%b8-%ec%98%88%eb%b0%a9-%eb%b0%8f-%ec%8b%a0%ec%86%8d%ed%95%9c-%eb%b3%b5%ea%b5%ac-%ec%a0%84%eb%9e%b5\/","title":{"rendered":"MSSQL \ud2b8\ub79c\uc7ad\uc158 \ub85c\uadf8 \uac00\ub4dd \ucc38: \uc608\ubc29 \ubc0f \uc2e0\uc18d\ud55c \ubcf5\uad6c \uc804\ub7b5"},"content":{"rendered":"<p>Microsoft SQL Server\ub97c \uad00\ub9ac\ud558\ub294 \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uad00\ub9ac\uc790(DBA)\uc640 DevOps \uc5d4\uc9c0\ub2c8\uc5b4\uc5d0\uac8c \uc624\ub958 9002: <em>&#8216;X&#8217; \ub370\uc774\ud130\ubca0\uc774\uc2a4\uc758 \ud2b8\ub79c\uc7ad\uc158 \ub85c\uadf8\uac00 \uaf49 \ucc3c\uc2b5\ub2c8\ub2e4(The transaction log for database &#8216;X&#8217; is full)<\/em>\ub9cc\ud07c \uc989\uac01\uc801\uc778 \ubd88\uc548\uac10\uc744 \uc8fc\ub294 \uacbd\uace0\ub294 \uac70\uc758 \uc5c6\uc2b5\ub2c8\ub2e4. \ud2b8\ub79c\uc7ad\uc158 \ub85c\uadf8\uac00 \uac00\ub4dd \ucc28\uc11c \ub354 \uc774\uc0c1 \uc99d\uac00\ud560 \uc218 \uc5c6\uac8c \ub418\uba74 \ub370\uc774\ud130\ubca0\uc774\uc2a4\ub294 \uc0ac\uc2e4\uc0c1 \uc77d\uae30 \uc804\uc6a9 \uc0c1\ud0dc\uac00 \ub429\ub2c8\ub2e4. \ubaa8\ub4e0 <code>INSERT<\/code>, <code>UPDATE<\/code>, <code>DELETE<\/code> \uc791\uc5c5\uc774 \uc911\ub2e8\ub418\uace0, \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \ud2b8\ub79c\uc7ad\uc158\uc774 \uc2e4\ud328\ud558\uba70, \uc6b4\uc601 \ud658\uacbd\uc774 \uc644\uc804\ud788 \ub9c8\ube44\ub429\ub2c8\ub2e4.<\/p>\n<p>SQL Server \ud2b8\ub79c\uc7ad\uc158 \ub85c\uadf8\uc758 \uae30\ubcf8 \uc544\ud0a4\ud14d\ucc98\ub97c \uc774\ud574\ud558\uace0, \uadfc\ubcf8 \uc6d0\uc778\uc744 \uc815\ud655\ud558\uac8c \uc9c4\ub2e8\ud558\uba70, \uc2e0\uc18d\ud55c \ubcf5\uad6c \uc808\ucc28\ub97c \uc2e4\ud589\ud558\ub294 \uac83\uc740 \uace0\uac00\uc6a9\uc131\uc744 \uc720\uc9c0\ud558\uae30 \uc704\ud55c \ud575\uc2ec \uae30\uc220\uc785\ub2c8\ub2e4. \uc774 \uc885\ud569 \uac00\uc774\ub4dc\uc5d0\uc11c\ub294 \ud2b8\ub79c\uc7ad\uc158 \ub85c\uadf8\uc758 \uba54\ucee4\ub2c8\uc998, \uae34\uae09 \uc0c1\ud669\uc5d0\uc11c \ub85c\uadf8\uac00 \uaf49 \ucc3c\uc744 \ub54c \ud574\uacb0\ud558\ub294 \ubc29\ubc95, \uadf8\ub9ac\uace0 \uc7ac\ubc1c \ubc29\uc9c0\ub97c \uc704\ud55c \uc544\ud0a4\ud14d\ucc98 \ubaa8\ubc94 \uc0ac\ub840\ub97c \uc0b4\ud3b4\ubd05\ub2c8\ub2e4.<\/p>\n<h2>SQL Server \ud2b8\ub79c\uc7ad\uc158 \ub85c\uadf8 \uc544\ud0a4\ud14d\ucc98 \uc774\ud574<\/h2>\n<p>\uaf49 \ucc2c \ud2b8\ub79c\uc7ad\uc158 \ub85c\uadf8\ub97c \ud6a8\uacfc\uc801\uc73c\ub85c \ubb38\uc81c \ud574\uacb0\ud558\ub824\uba74 \uba3c\uc800 SQL Server\uac00 \ub370\uc774\ud130\ub97c \uc4f0\uace0 \uad00\ub9ac\ud558\ub294 \ubc29\uc2dd\uc744 \uc774\ud574\ud574\uc57c \ud569\ub2c8\ub2e4.<\/p>\n<h3>\uc120\ud589 \uae30\ub85d \ub85c\uae45(Write-Ahead Logging, WAL)<\/h3>\n<p>SQL Server\ub294 \uc120\ud589 \uae30\ub85d \ub85c\uae45(WAL) \ud504\ub85c\ud1a0\ucf5c\uc744 \uc0ac\uc6a9\ud569\ub2c8\ub2e4. \ub370\uc774\ud130 \uc218\uc815\uc774 \ubc1c\uc0dd\ud560 \ub54c\ub9c8\ub2e4 \ubcc0\uacbd \uc0ac\ud56d\uc740 \uba3c\uc800 \uba54\ubaa8\ub9ac\uc758 \ud2b8\ub79c\uc7ad\uc158 \ub85c\uadf8\uc5d0 \uae30\ub85d\ub41c \ub2e4\uc74c, \ub370\uc774\ud130\ubca0\uc774\uc2a4 \ud30c\uc77c(MDF\/NDF)\uc758 \uc2e4\uc81c \ub370\uc774\ud130 \ud398\uc774\uc9c0\uac00 \uc5c5\ub370\uc774\ud2b8\ub418\uae30 \uc804\uc5d0 \ub514\uc2a4\ud06c\uc758 \ubb3c\ub9ac\uc801 \ub85c\uadf8 \ud30c\uc77c\ub85c \ud50c\ub7ec\uc2dc\ub429\ub2c8\ub2e4. \uc774\ub294 ACID(\uc6d0\uc790\uc131, \uc77c\uad00\uc131, \uaca9\ub9ac\uc131, \uc9c0\uc18d\uc131) \uc900\uc218\ub97c \ubcf4\uc7a5\ud558\uba70, \ucda9\ub3cc \ubc1c\uc0dd \uc2dc SQL Server\uac00 \ud2b8\ub79c\uc7ad\uc158\uc744 \ub2e4\uc2dc \uc2e4\ud589(roll forward)\ud558\uac70\ub098 \ucde8\uc18c(roll back)\ud560 \uc218 \uc788\ub3c4\ub85d \ud569\ub2c8\ub2e4.<\/p>\n<h3>\uac00\uc0c1 \ub85c\uadf8 \ud30c\uc77c(VLF) \ubc0f \uc21c\ud658 \ub85c\uae45<\/h3>\n<p>\ub0b4\ubd80\uc801\uc73c\ub85c \ubb3c\ub9ac\uc801 \ud2b8\ub79c\uc7ad\uc158 \ub85c\uadf8 \ud30c\uc77c(LDF)\uc740 \uac00\uc0c1 \ub85c\uadf8 \ud30c\uc77c(VLF)\uc774\ub77c\ub294 \ub354 \uc791\uc740 \ub17c\ub9ac\uc801 \uc138\uadf8\uba3c\ud2b8\ub85c \ub098\ub269\ub2c8\ub2e4. \ud2b8\ub79c\uc7ad\uc158 \ub85c\uadf8\ub294 \uc21c\ud658 \ubc29\uc2dd\uc73c\ub85c \uc791\ub3d9\ud569\ub2c8\ub2e4. \ub85c\uadf8 \ub808\ucf54\ub4dc\uac00 \uae30\ub85d\ub418\uba74 \ud558\ub098\uc758 VLF\ub97c \ucc44\uc6b0\uace0 \ub2e4\uc74c VLF\ub85c \uc774\ub3d9\ud569\ub2c8\ub2e4.<\/p>\n<p>\ub85c\uadf8\uac00 \ubb3c\ub9ac\uc801 \ud30c\uc77c\uc758 \ub05d\uc5d0 \ub3c4\ub2ec\ud558\uba74 \ucc98\uc74c\uc73c\ub85c \ub3cc\uc544\uac00 \ub36e\uc5b4\uc4f0\uae30\ub97c \uc2dc\ub3c4\ud569\ub2c8\ub2e4. \uadf8\ub7ec\ub098 VLF\uac00 <strong>\ube44\ud65c\uc131(inactive)<\/strong>\uc73c\ub85c \ud45c\uc2dc\ub41c \uacbd\uc6b0\uc5d0\ub9cc \ub36e\uc5b4\uc4f8 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ubaa8\ub4e0 VLF\uac00 \ud65c\uc131 \uc0c1\ud0dc(\uc989, SQL Server\uac00 \uc5ec\uc804\ud788 \ud544\uc694\ub85c \ud558\ub294 \ub85c\uadf8 \ub808\ucf54\ub4dc\ub97c \ud3ec\ud568\ud558\uace0 \uc788\uc74c)\ub77c\uba74 \ub85c\uadf8\ub294 \uc21c\ud658\ud560 \uc218 \uc5c6\uc2b5\ub2c8\ub2e4. \uc790\ub3d9 \uc99d\uac00\uac00 \ud65c\uc131\ud654\ub418\uc5b4 \uc788\uace0 \ub514\uc2a4\ud06c \uacf5\uac04\uc774 \ucda9\ubd84\ud558\uba74 \ubb3c\ub9ac\uc801 \ud30c\uc77c\uc774 \ucee4\uc9d1\ub2c8\ub2e4. \ub514\uc2a4\ud06c\uac00 \uaf49 \ucc3c\uac70\ub098 \uc790\ub3d9 \uc99d\uac00\uac00 \uc81c\ud55c\ub41c \uacbd\uc6b0 \uc624\ub958 9002\uac00 \ubc1c\uc0dd\ud569\ub2c8\ub2e4.<\/p>\n<h3>\ub85c\uadf8 \uc798\ub9bc(Truncation) vs. \ub85c\uadf8 \ucd95\uc18c(Shrinking)<\/h3>\n<p>\ub85c\uadf8\ub97c \uc798\ub77c\ub0b4\ub294 \uac83\uc774 \ubb3c\ub9ac\uc801 \ud30c\uc77c \ud06c\uae30\ub97c \uc904\uc778\ub2e4\ub294 \uac83\uc740 \ud754\ud55c \uc624\ud574\uc785\ub2c8\ub2e4.<br \/>\n*   <strong>\ub85c\uadf8 \uc798\ub9bc(Log Truncation):<\/strong> \ud65c\uc131 VLF\ub97c \ube44\ud65c\uc131\uc73c\ub85c \ud45c\uc2dc\ud558\uc5ec \uc7ac\uc0ac\uc6a9 \uac00\ub2a5\ud55c \uacf5\uac04\uc73c\ub85c \ub9cc\ub4dc\ub294 \uacfc\uc815\uc785\ub2c8\ub2e4. \ub514\uc2a4\ud06c\uc758 LDF \ud30c\uc77c \ud06c\uae30\ub97c \uc904\uc774\uc9c0\ub294 <em>\uc54a\uc2b5\ub2c8\ub2e4<\/em>.<br \/>\n*   <strong>\ub85c\uadf8 \ucd95\uc18c(Log Shrinking):<\/strong> LDF \ud30c\uc77c \ud06c\uae30\ub97c \ubb3c\ub9ac\uc801\uc73c\ub85c \uc904\uc5ec \uc6b4\uc601 \uccb4\uc81c\uc5d0 \uacf5\uac04\uc744 \ubc18\ud658\ud558\ub294 \uacfc\uc815\uc785\ub2c8\ub2e4.<\/p>\n<p>\uc804\uccb4 \ubcf5\uad6c \ubaa8\ub378\uc5d0\uc11c \ub85c\uadf8 \uc798\ub9bc\uc740 \ud2b8\ub79c\uc7ad\uc158 \ub85c\uadf8 \ubc31\uc5c5\uc774 \uc131\uacf5\uc801\uc73c\ub85c \uc644\ub8cc\ub418\uc5c8\uc744 \ub54c\ub9cc \ubc1c\uc0dd\ud569\ub2c8\ub2e4(\ub2e4\ub978 \ud504\ub85c\uc138\uc2a4\uac00 \ub85c\uadf8\ub97c \ud65c\uc131 \uc0c1\ud0dc\ub85c \uc720\uc9c0\ud558\uc9c0 \uc54a\ub294\ub2e4\uace0 \uac00\uc815).<\/p>\n<h2>&#8220;\ud2b8\ub79c\uc7ad\uc158 \ub85c\uadf8 \uaf49 \ucc38&#8221; \uc624\ub958(\uc624\ub958 9002) \uc9c4\ub2e8<\/h2>\n<p>\ub85c\uadf8\uac00 \uaf49 \ucc3c\uc744 \ub54c \uccab \ubc88\uc9f8 \ub2e8\uacc4\ub294 \ubb34\uc791\uc815 \ub514\uc2a4\ud06c \uacf5\uac04\uc744 \ucd94\uac00\ud558\uac70\ub098 \ud30c\uc77c\uc744 \ucd95\uc18c\ud558\ub294 \uac83\uc774 \uc544\ub2d9\ub2c8\ub2e4. \ub85c\uadf8\uac00 \uc798\ub9ac\uc9c0 \uc54a\ub294 <em>\uc774\uc720<\/em>\ub97c \ud30c\uc545\ud574\uc57c \ud569\ub2c8\ub2e4. SQL Server\ub294 <code>sys.databases<\/code> \uce74\ud0c8\ub85c\uadf8 \ubdf0\ub97c \ud1b5\ud574 \ub85c\uadf8 \uc7ac\uc0ac\uc6a9\uc744 \ubc29\ud574\ud558\ub294 \uc6d0\uc778\uc744 \uc815\ud655\ud788 \uc54c\ub824\uc8fc\ub294 \ub0b4\uc7a5 \uba54\ucee4\ub2c8\uc998\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4.<\/p>\n<p>\ub2e4\uc74c T-SQL \uba85\ub839\uc744 \uc2e4\ud589\ud558\uc5ec \ubcd1\ubaa9 \ud604\uc0c1\uc744 \uc2dd\ubcc4\ud558\uc2ed\uc2dc\uc624:<\/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>\ub2e4\uc74c \uba85\ub839\uc744 \uc0ac\uc6a9\ud558\uc5ec \ud2b8\ub79c\uc7ad\uc158 \ub85c\uadf8\uc758 \ud604\uc7ac \uacf5\uac04 \uc0ac\uc6a9\ub7c9\uc744 \ud655\uc778\ud560 \uc218\ub3c4 \uc788\uc2b5\ub2c8\ub2e4:<\/p>\n<pre><code class=\"language-sql\">DBCC SQLPERF(LOGSPACE);\n<\/code><\/pre>\n<h3>\uc77c\ubc18\uc801\uc778 <code>log_reuse_wait_desc<\/code> \uc0c1\ud0dc<\/h3>\n<ol>\n<li><strong>LOG_BACKUP:<\/strong> \ub370\uc774\ud130\ubca0\uc774\uc2a4\uac00 \uc804\uccb4 \ub610\ub294 \ub300\ub7c9 \ub85c\uadf8 \ubcf5\uad6c \ubaa8\ub378\uc774\uba70, \ucd5c\uadfc\uc5d0 \ud2b8\ub79c\uc7ad\uc158 \ub85c\uadf8 \ubc31\uc5c5\uc744 \uc218\ud589\ud558\uc9c0 \uc54a\uc558\uc2b5\ub2c8\ub2e4. \uac00\uc7a5 \ud754\ud55c \uc6d0\uc778\uc785\ub2c8\ub2e4.<\/li>\n<li><strong>ACTIVE_TRANSACTION:<\/strong> \uc7a5\uae30 \uc2e4\ud589 \ud2b8\ub79c\uc7ad\uc158(\uc608: \ub300\uaddc\ubaa8 \uc778\ub371\uc2a4 \uc7ac\uad6c\ucd95 \ub610\ub294 \ucee4\ubc0b\ub418\uc9c0 \uc54a\uc740 \uc78a\ud600\uc9c4 \ud2b8\ub79c\uc7ad\uc158)\uc774 \ub85c\uadf8\ub97c \ud65c\uc131 \uc0c1\ud0dc\ub85c \uc720\uc9c0\ud558\uace0 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n<li><strong>REPLICATION \/ CDC:<\/strong> \ud2b8\ub79c\uc7ad\uc158 \ubcf5\uc81c \ub610\ub294 \ubcc0\uacbd \ub370\uc774\ud130 \ucea1\ucc98(CDC)\uac00 \ud65c\uc131\ud654\ub418\uc5b4 \uc788\uc73c\uba70, \ub85c\uadf8 \ud310\ub3c5\uae30 \uc5d0\uc774\uc804\ud2b8\uac00 \uc544\uc9c1 \ud2b8\ub79c\uc7ad\uc158\uc744 \ucc98\ub9ac\ud558\uc9c0 \uc54a\uc558\uc2b5\ub2c8\ub2e4.<\/li>\n<li><strong>AVAILABILITY_REPLICA:<\/strong> AlwaysOn \uac00\uc6a9\uc131 \uadf8\ub8f9\uc5d0\uc11c \ubcf4\uc870 \ubcf5\uc81c\ubcf8\uc774 \uc5f0\uacb0 \ud574\uc81c\ub418\uc5c8\uac70\ub098 \ub3d9\uae30\ud654 \uc18d\ub3c4\uac00 \ub108\ubb34 \ub290\ub824, \uc8fc \ubcf5\uc81c\ubcf8\uc774 \ubcf4\uc870 \ubcf5\uc81c\ubcf8\uc5d0 \ub85c\uadf8 \ub808\ucf54\ub4dc\uac00 \uae30\ub85d\ub420 \ub54c\uae4c\uc9c0 \ub85c\uadf8\ub97c \uc720\uc9c0\ud558\ub3c4\ub85d \uac15\uc81c\ud558\uace0 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n<\/ol>\n<h2>\uc2e0\uc18d\ud55c \ubcf5\uad6c \uc804\ub7b5: \uc6b4\uc601 \ud658\uacbd\uc5d0\uc11c \ubb38\uc81c \ud574\uacb0<\/h2>\n<p>\ubc18\ud658\ub41c <code>log_reuse_wait_desc<\/code>\uc5d0 \ub530\ub77c \uae34\uae09 \ub300\uc751 \ubc29\ubc95\uc774 \ub2ec\ub77c\uc9d1\ub2c8\ub2e4. \uac00\uc7a5 \uc77c\ubc18\uc801\uc778 \uc2dc\ub098\ub9ac\uc624\uc5d0 \ub300\ud55c \uc2e0\uc18d\ud55c \ubcf5\uad6c \uc804\ub7b5\uc740 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/p>\n<h3>\uc2dc\ub098\ub9ac\uc624 1: \ub85c\uadf8 \ubc31\uc5c5 \ub204\ub77d \ub610\ub294 \uc2e4\ud328 (<code>LOG_BACKUP<\/code>)<\/h3>\n<p>\ub300\uae30 \uc720\ud615\uc774 <code>LOG_BACKUP<\/code>\uc778 \uacbd\uc6b0 \ud574\uacb0\ucc45\uc740 \uac04\ub2e8\ud569\ub2c8\ub2e4. \ud2b8\ub79c\uc7ad\uc158 \ub85c\uadf8\ub97c \ubc31\uc5c5\ud574\uc57c \ud569\ub2c8\ub2e4.<\/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>\ubc31\uc5c5\uc774 \uc644\ub8cc\ub418\uba74 \ube44\ud65c\uc131 VLF\uac00 \uc798\ub9ac\uace0 SQL Server\uac00 \uc815\uc0c1 \uc791\ub3d9\uc744 \uc7ac\uac1c\ud569\ub2c8\ub2e4. \ubc31\uc5c5 \ub4dc\ub77c\uc774\ube0c\uac00 \uaf49 \ucc3c\ub2e4\uba74 \uc784\uc2dc \ub124\ud2b8\uc6cc\ud06c \uacf5\uc720\ub098 null \uc7a5\uce58\ub85c \ubc31\uc5c5\ud574\uc57c \ud560 \uc218\ub3c4 \uc788\uc2b5\ub2c8\ub2e4(\ub370\uc774\ud130\ubca0\uc774\uc2a4\ub97c \uc27d\uac8c \uc7ac\ud604\ud560 \uc218 \uc5c6\ub294 \uacbd\uc6b0 \ub85c\uadf8 \uccb4\uc778\uc774 \ub04a\uc5b4\uc9c0\ubbc0\ub85c \uad8c\uc7a5\ud558\uc9c0 \uc54a\uc74c):<\/p>\n<pre><code class=\"language-sql\">-- \uacbd\uace0: \uc774 \uc791\uc5c5\uc740 \ub85c\uadf8 \uccb4\uc778\uc744 \ub04a\uace0 \ud2b9\uc815 \uc2dc\uc810 \ubcf5\uad6c\ub97c \ubd88\uac00\ub2a5\ud558\uac8c \ub9cc\ub4ed\ub2c8\ub2e4.\n-- \uc808\ub300\uc801\uc73c\ub85c \ud544\uc694\ud55c \uacbd\uc6b0\uc5d0\ub9cc \uc0ac\uc6a9\ud558\uace0 \uc989\uc2dc \uc804\uccb4 \ubc31\uc5c5\uc744 \uc218\ud589\ud558\uc2ed\uc2dc\uc624.\nBACKUP LOG [YourDatabaseName] TO DISK = 'NUL';\n<\/code><\/pre>\n<h3>\uc2dc\ub098\ub9ac\uc624 2: \uc7a5\uae30 \uc2e4\ud589 \ud65c\uc131 \ud2b8\ub79c\uc7ad\uc158 (<code>ACTIVE_TRANSACTION<\/code>)<\/h3>\n<p>\ub2e8\uc77c \ud2b8\ub79c\uc7ad\uc158\uc774 \uba87 \uc2dc\uac04 \ub3d9\uc548 \uc2e4\ud589 \uc911\uc774\uba74 \uc804\uccb4 \uae30\uac04 \ub3d9\uc548 \ub85c\uadf8 \uc798\ub9bc\uc744 \ubc29\ud574\ud569\ub2c8\ub2e4. \uba3c\uc800 \ubb38\uc81c\ub97c \uc77c\uc73c\ud0a4\ub294 \ud2b8\ub79c\uc7ad\uc158\uc744 \uc2dd\ubcc4\ud558\uc2ed\uc2dc\uc624:<\/p>\n<pre><code class=\"language-sql\">DBCC OPENTRAN('YourDatabaseName');\n<\/code><\/pre>\n<p>\uc774 \uba85\ub839\uc740 \uac00\uc7a5 \uc624\ub798\ub41c \ud65c\uc131 \ud2b8\ub79c\uc7ad\uc158\uacfc \ud574\ub2f9 SPID(\uc11c\ubc84 \ud504\ub85c\uc138\uc2a4 ID)\ub97c \ubc18\ud658\ud569\ub2c8\ub2e4. \ub3d9\uc801 \uad00\ub9ac \ubdf0(DMV)\ub97c \ucffc\ub9ac\ud558\uc5ec \ud574\ub2f9 SPID\uac00 \uc218\ud589 \uc911\uc778 \uc791\uc5c5\uc5d0 \ub300\ud55c \uc790\uc138\ud55c \ub0b4\uc6a9\uc744 \ud655\uc778\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4:<\/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>\ud2b8\ub79c\uc7ad\uc158\uc774 \uc798\ubabb\ub41c \ucffc\ub9ac\uc774\uac70\ub098 \uc911\ub2e8\ub41c \ud504\ub85c\uc138\uc2a4\uc778 \uacbd\uc6b0 \ub85c\uadf8\ub97c \ud574\uc81c\ud558\uae30 \uc704\ud574 \uc885\ub8cc\ud574\uc57c \ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<pre><code class=\"language-sql\">KILL &lt;SPID&gt;;\n<\/code><\/pre>\n<p><em>\ucc38\uace0: \ub300\uaddc\ubaa8 \ud2b8\ub79c\uc7ad\uc158\uc744 \uac15\uc81c \uc885\ub8cc\ud558\uba74 \ub864\ubc31\uc774 \ud2b8\ub9ac\uac70\ub418\uba70, \uc774\ub294 \uc0c1\ub2f9\ud55c \uc2dc\uac04\uc774 \uc18c\uc694\ub420 \uc218 \uc788\uace0 \uc77c\uc2dc\uc801\uc73c\ub85c \ucd94\uac00 \ub85c\uadf8 \ud65c\ub3d9\uc744 \uc0dd\uc131\ud569\ub2c8\ub2e4. \ub864\ubc31 \uc911\uc5d0 SQL Server \uc11c\ube44\uc2a4\ub97c \ub2e4\uc2dc \uc2dc\uc791\ud558\uc9c0 \ub9c8\uc2ed\uc2dc\uc624. \uadf8\ub807\uc9c0 \uc54a\uc73c\uba74 \ub2e4\uc2dc \uc2dc\uc791\ud560 \ub54c \ub370\uc774\ud130\ubca0\uc774\uc2a4\uac00 \ubcf5\uad6c \ubaa8\ub4dc\ub85c \uc9c4\uc785\ud569\ub2c8\ub2e4.<\/em><\/p>\n<h3>\uc2dc\ub098\ub9ac\uc624 3: \uae34\uae09 \uacf5\uac04 \ud560\ub2f9 (\ub514\uc2a4\ud06c 100% \uc0ac\uc6a9)<\/h3>\n<p>LDF \ud30c\uc77c\uc774 \uc804\uccb4 \ub4dc\ub77c\uc774\ube0c\ub97c \uc18c\ube44\ud55c \uacbd\uc6b0, SQL Server\uac00 \ubc31\uc5c5 \uc774\ubca4\ud2b8 \uc790\uccb4\ub97c \uae30\ub85d\ud558\uae30 \uc704\ud574 \uc57d\uac04\uc758 \ub85c\uadf8 \uacf5\uac04\uc744 \ud544\uc694\ub85c \ud558\ubbc0\ub85c \ubc31\uc5c5\uc870\ucc28 \uc2e4\ud589\ud560 \uc218 \uc5c6\uc2b5\ub2c8\ub2e4. \uc774 \uc2dc\ub098\ub9ac\uc624\uc5d0\uc11c\ub294 \uc0ac\uc6a9 \uac00\ub2a5\ud55c \uacf5\uac04\uc774 \uc788\ub294 \ub2e4\ub978 \ub4dc\ub77c\uc774\ube0c\uc5d0 \ubcf4\uc870 \ub85c\uadf8 \ud30c\uc77c\uc744 \ucd94\uac00\ud574\uc57c \ud569\ub2c8\ub2e4.<\/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>\uc774\ub807\uac8c \ud558\uba74 \uc989\uc2dc SQL Server\uc5d0 \uc228\ud1b5\uc774 \ud2b8\uc785\ub2c8\ub2e4. \ub370\uc774\ud130\ubca0\uc774\uc2a4\uac00 \uc628\ub77c\uc778 \uc0c1\ud0dc\uac00 \ub418\uba74 \ud2b8\ub79c\uc7ad\uc158 \ub85c\uadf8 \ubc31\uc5c5\uc744 \uc218\ud589\ud558\uace0, \ubcf4\uc870 \ub85c\uadf8 \ud30c\uc77c\uc744 \ube44\uc6b4 \ub2e4\uc74c \uc81c\uac70\ud558\uc2ed\uc2dc\uc624:<\/p>\n<pre><code class=\"language-sql\">-- 1. \ub85c\uadf8\ub97c \uc790\ub974\uae30 \uc704\ud574 \ub85c\uadf8 \ubc31\uc5c5 \uc218\ud589\nBACKUP LOG [YourDatabaseName] TO DISK = '...';\n\n-- 2. \uc784\uc2dc \ub85c\uadf8 \ud30c\uc77c \ube44\uc6b0\uae30\nDBCC SHRINKFILE (N'YourDatabaseName_Log2', EMPTYFILE);\n\n-- 3. \uc784\uc2dc \ub85c\uadf8 \ud30c\uc77c \uc81c\uac70\nALTER DATABASE [YourDatabaseName] REMOVE FILE [YourDatabaseName_Log2];\n<\/code><\/pre>\n<h2>\ud2b8\ub79c\uc7ad\uc158 \ub85c\uadf8 \uc608\ubc29 \ubc0f \uad00\ub9ac\ub97c \uc704\ud55c \ubaa8\ubc94 \uc0ac\ub840<\/h2>\n<p>\uc0ac\ud6c4 \ub300\uc751\uc2dd \ubb38\uc81c \ud574\uacb0\uc740 \uc2a4\ud2b8\ub808\uc2a4\uac00 \ub9ce\uace0 SLA\uc5d0 \uc601\ud5a5\uc744 \ubbf8\uce69\ub2c8\ub2e4. \uc5d4\ud130\ud504\ub77c\uc774\uc988 \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc548\uc815\uc131\uc744 \uc704\ud574\uc11c\ub294 \uc0ac\uc804 \uc608\ubc29\uc801 \uc544\ud0a4\ud14d\ucc98 \ubc0f \uc6b4\uc601 \ubaa8\ubc94 \uc0ac\ub840\ub97c \uad6c\ud604\ud558\ub294 \uac83\uc774 \ud544\uc218\uc801\uc785\ub2c8\ub2e4.<\/p>\n<h3>1. \uac15\ub825\ud558\uace0 \uc790\ub3d9\ud654\ub41c \ubc31\uc5c5 \uc804\ub7b5 \uad6c\ud604<\/h3>\n<p>\ub370\uc774\ud130\ubca0\uc774\uc2a4\uac00 \uc804\uccb4 \ubcf5\uad6c \ubaa8\ub378\uc778 \uacbd\uc6b0 \ube48\ubc88\ud55c \ud2b8\ub79c\uc7ad\uc158 \ub85c\uadf8 \ubc31\uc5c5\uc740 \ud544\uc218\uc785\ub2c8\ub2e4. RPO(\ubcf5\uad6c \ubaa9\ud45c \uc2dc\uc810)\uc640 \ud2b8\ub79c\uc7ad\uc158 \ubcfc\ub968\uc5d0 \ub530\ub77c \ub85c\uadf8 \ubc31\uc5c5\uc740 5~15\ubd84\ub9c8\ub2e4 \uc218\ud589\ub418\uc5b4\uc57c \ud569\ub2c8\ub2e4.<\/p>\n<p>CloudSave\uc640 \uac19\uc740 \uc5d4\ud130\ud504\ub77c\uc774\uc988 \ubc31\uc5c5 \uc194\ub8e8\uc158\uc740 \uc774 \uacfc\uc815\uc744 \ud06c\uac8c \ub2e8\uc21c\ud654\ud569\ub2c8\ub2e4. VDI(\uac00\uc0c1 \uc7a5\uce58 \uc778\ud130\ud398\uc774\uc2a4)\ub97c \ud1b5\ud574 SQL Server\uc640 \uc9c1\uc811 \ud1b5\ud569\ud568\uc73c\ub85c\uc368, CloudSave\ub294 DBA\uac00 \uc815\ucc45 \uae30\ubc18\uc758 \uace0\ube48\ub3c4 \ud2b8\ub79c\uc7ad\uc158 \ub85c\uadf8 \ubc31\uc5c5\uc744 \uad6c\uc131\ud560 \uc218 \uc788\ub3c4\ub85d \uc9c0\uc6d0\ud569\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \ubcf5\uc7a1\ud55c \uc0ac\uc6a9\uc790 \uc9c0\uc815 SQL \uc5d0\uc774\uc804\ud2b8 \uc791\uc5c5 \uc5c6\uc774\ub3c4 \ub85c\uadf8\uac00 \uc9c0\uc18d\uc801\uc73c\ub85c \uc798\ub9ac\uace0, \uc548\uc804\ud558\uac8c \uc554\ud638\ud654\ub418\uba70, \uc624\ud504\uc0ac\uc774\ud2b8 \ub610\ub294 \ubcc0\uacbd \ubd88\uac00\ub2a5\ud55c \ud074\ub77c\uc6b0\ub4dc \uc2a4\ud1a0\ub9ac\uc9c0\uc5d0 \uc800\uc7a5\ub418\uc5b4 <code>LOG_BACKUP<\/code> \ub300\uae30 \uc0c1\ud0dc\ub97c \ubc29\uc9c0\ud569\ub2c8\ub2e4.<\/p>\n<h3>2. \ud2b8\ub79c\uc7ad\uc158 \ub85c\uadf8 \ud06c\uae30 \ucd5c\uc801\ud654 \ubc0f VLF \uad00\ub9ac<\/h3>\n<p>\ud2b8\ub79c\uc7ad\uc158 \ub85c\uadf8 \ud06c\uae30\ub97c \uad00\ub9ac\ud558\uae30 \uc704\ud574 \uc790\ub3d9 \uc99d\uac00\uc5d0 \uc758\uc874\ud558\ub294 \uac83\uc740 \uc704\ud5d8\ud55c \uc548\ud2f0 \ud328\ud134\uc785\ub2c8\ub2e4. \uc790\ub3d9 \uc99d\uac00 \uc791\uc5c5\uc740 \ube44\uc6a9\uc774 \ub9ce\uc774 \ub4e4\uba70 \ub514\uc2a4\ud06c\uac00 0\uc73c\ub85c \ucd08\uae30\ud654\ub418\ub294 \ub3d9\uc548 \ud2b8\ub79c\uc7ad\uc158 \ucc98\ub9ac\ub97c \uc77c\uc2dc \uc911\uc9c0\uc2dc\ud0b5\ub2c8\ub2e4(\ub85c\uadf8 \ud30c\uc77c\uc5d0\ub294 \uc801\uc6a9\ub418\uc9c0 \uc54a\ub294 \uc989\uc2dc \ud30c\uc77c \ucd08\uae30\ud654\uac00 \ud65c\uc131\ud654\ub41c \uacbd\uc6b0 \uc81c\uc678).<\/p>\n<p>\ub610\ud55c, \ube48\ubc88\ud558\uace0 \uc791\uc740 \uc790\ub3d9 \uc99d\uac00(\uc608: \ud55c \ubc88\uc5d0 10% \ub610\ub294 50MB\uc529 \uc99d\uac00)\ub294 <strong>VLF \uc870\uac01\ud654<\/strong>\ub97c \ucd08\ub798\ud569\ub2c8\ub2e4. \uc218\ucc9c \uac1c\uc758 \uc791\uc740 VLF\uac00 \uc788\ub294 \ud2b8\ub79c\uc7ad\uc158 \ub85c\uadf8\ub294 \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc2dc\uc791 \uc2dc\uac04, \ubc31\uc5c5 \uc131\ub2a5 \ubc0f \ubcf5\uc81c \uc9c0\uc5f0 \uc2dc\uac04\uc744 \uc2ec\uac01\ud558\uac8c \uc800\ud558\uc2dc\ud0b5\ub2c8\ub2e4.<\/p>\n<ul>\n<li><strong>\ub85c\uadf8 \ud06c\uae30 \uc0ac\uc804 \uc124\uc815:<\/strong> \uac00\uc7a5 \ud070 \uc720\uc9c0 \uad00\ub9ac \uc791\uc5c5(\uc608: \uc778\ub371\uc2a4 \uc7ac\uad6c\ucd95)\uc744 \ubd84\uc11d\ud558\uace0 \uc99d\uac00 \uc5c6\uc774 \uc218\uc6a9\ud560 \uc218 \uc788\ub3c4\ub85d LDF \ud30c\uc77c \ud06c\uae30\ub97c \ubbf8\ub9ac \uc124\uc815\ud558\uc2ed\uc2dc\uc624.<\/li>\n<li><strong>\uace0\uc815 \uc790\ub3d9 \uc99d\uac00 \uc124\uc815:<\/strong> \uc790\ub3d9 \uc99d\uac00\ub97c \ubc31\ubd84\uc728\uc774 \uc544\ub2cc \uace0\uc815 \ud06c\uae30(\uc608: 1GB \ub610\ub294 5GB)\ub85c \ubcc0\uacbd\ud558\uc5ec VLF\uac00 \uc801\uc808\ud55c \ud06c\uae30\ub85c \uc0dd\uc131\ub418\ub3c4\ub85d \ud558\uc2ed\uc2dc\uc624.<\/li>\n<\/ul>\n<p>\ub2e4\uc74c \ucffc\ub9ac\ub97c \uc0ac\uc6a9\ud558\uc5ec VLF \uac1c\uc218\ub97c \ud655\uc778\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4(SQL Server 2017 \uc774\uc0c1):<\/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>VLF \uac1c\uc218\uac00 500\uac1c\ub97c \ub118\ub294\ub2e4\uba74, \ud55c\uac00\ud55c \uc2dc\uac04\uc744 \uae30\ub2e4\ub824 \ub85c\uadf8\ub97c \ucd5c\uc18c \ud06c\uae30\ub85c \ucd95\uc18c\ud55c \ub2e4\uc74c, \ud070 \ub2e8\uc704\ub85c \ud544\uc694\ud55c \ud06c\uae30\ub9cc\ud07c \uc218\ub3d9\uc73c\ub85c \ub2e4\uc2dc \ub298\ub9ac\ub294 \uac83\uc744 \uace0\ub824\ud558\uc2ed\uc2dc\uc624.<\/p>\n<h3>3. \uc778\ub371\uc2a4 \uc720\uc9c0 \uad00\ub9ac \uc791\uc5c5 \ucd5c\uc801\ud654<\/h3>\n<p>\uc778\ub371\uc2a4 \uc7ac\uad6c\ucd95\uc740 \ub300\ub7c9 \ub85c\uadf8 \ubcf5\uad6c \ubaa8\ub378\uc5d0\uc11c\ub3c4(\uc778\ub371\uc2a4 \uc720\ud615\uc5d0 \ub530\ub77c) \uc644\uc804\ud788 \uae30\ub85d\ub418\ub294 \uc791\uc5c5\uc785\ub2c8\ub2e4. 500GB \uc778\ub371\uc2a4\ub97c \uc7ac\uad6c\ucd95\ud558\uba74 \ucd5c\uc18c 500GB\uc758 \ud2b8\ub79c\uc7ad\uc158 \ub85c\uadf8 \ub808\ucf54\ub4dc\uac00 \uc0dd\uc131\ub429\ub2c8\ub2e4.<\/p>\n<p>\uc720\uc9c0 \uad00\ub9ac \uc911 \ub85c\uadf8 \ud33d\ucc3d\uc744 \uc644\ud654\ud558\ub824\uba74:<br \/>\n*   \uc778\ub371\uc2a4 \uc7ac\uad6c\ucd95 \uc2dc <code>SORT_IN_TEMPDB = ON<\/code>\uc744 \uc0ac\uc6a9\ud558\uc2ed\uc2dc\uc624. \uc815\ub82c \ub2e8\uacc4\ub97c TempDB\ub85c \uc624\ud504\ub85c\ub4dc\ud558\uc5ec \uc0ac\uc6a9\uc790 \ub370\uc774\ud130\ubca0\uc774\uc2a4 \ud2b8\ub79c\uc7ad\uc158 \ub85c\uadf8\uc758 \ubd80\ub2f4\uc744 \uc904\uc785\ub2c8\ub2e4.<br \/>\n*   \uac00\ub2a5\ud55c \uacbd\uc6b0 \uc778\ub371\uc2a4 <em>\uc7ac\uad6c\ucd95<\/em>\uc5d0\uc11c \uc778\ub371\uc2a4 <em>\uc7ac\uad6c\uc131<\/em>\uc73c\ub85c \uc804\ud658\ud558\uc2ed\uc2dc\uc624. \uc7ac\uad6c\uc131\uc740 \ub85c\uadf8 \ud6a8\uc728\uc131\uc774 \ub354 \ub192\uc73c\uba70 \uc804\uccb4 \uc791\uc5c5\uc744 \ub864\ubc31\ud558\uc9c0 \uc54a\uace0\ub3c4 \uc911\ub2e8\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<br \/>\n*   \ub300\uaddc\ubaa8 <code>DELETE<\/code> \ub610\ub294 <code>UPDATE<\/code> \uc791\uc5c5\uc744 \uc77c\uad04 \ucc98\ub9ac\ud558\uc2ed\uc2dc\uc624. \ud55c \ud2b8\ub79c\uc7ad\uc158\uc5d0\uc11c 1,000\ub9cc \ud589\uc744 \uc0ad\uc81c\ud558\ub294 \ub300\uc2e0 50,000\uac1c \ub2e8\uc704\ub85c \uc0ad\uc81c\ud558\uace0, \ubc30\uce58 \uc0ac\uc774\uc5d0 \ucee4\ubc0b\ud558\uc5ec \ub85c\uadf8 \ubc31\uc5c5\uc774 \ub85c\uadf8\ub97c \uc798\ub77c\ub0bc \uc218 \uc788\ub3c4\ub85d \ud558\uc2ed\uc2dc\uc624.<\/p>\n<h3>4. \uace0\uac00\uc6a9\uc131 \ubc0f \ubcf5\uc81c \ud1a0\ud3f4\ub85c\uc9c0 \ubaa8\ub2c8\ud130\ub9c1<\/h3>\n<p>AlwaysOn \uac00\uc6a9\uc131 \uadf8\ub8f9\uc5d0\uc11c \uc8fc \ubcf5\uc81c\ubcf8\uc740 \ubaa8\ub4e0 \ub3d9\uae30 \ubc0f \ube44\ub3d9\uae30 \ubcf4\uc870 \ubcf5\uc81c\ubcf8\uc5d0 \ub85c\uadf8 \ub808\ucf54\ub4dc\uac00 \uae30\ub85d\ub420 \ub54c\uae4c\uc9c0 \ub85c\uadf8\ub97c \uc790\ub97c \uc218 \uc5c6\uc2b5\ub2c8\ub2e4.<\/p>\n<p>\ubcf4\uc870 \ubcf5\uc81c\ubcf8\uc774 \uc624\ud504\ub77c\uc778 \uc0c1\ud0dc\uac00 \ub418\uac70\ub098 \ub124\ud2b8\uc6cc\ud06c \ub300\uc5ed\ud3ed\uc774 \uc8fc \ubcf5\uc81c\ubcf8\uc758 \ud2b8\ub79c\uc7ad\uc158 \uc0dd\uc131 \uc18d\ub3c4\ub97c \ub530\ub77c\uac00\uc9c0 \ubabb\ud558\uba74 \uc8fc \ubcf5\uc81c\ubcf8\uc758 \uc804\uc1a1 \ud050\uac00 \ucee4\uc9c0\uace0 \ub85c\uadf8\uac00 \uaf49 \ucc28\uac8c \ub429\ub2c8\ub2e4(<code>AVAILABILITY_REPLICA<\/code> \ub300\uae30 \uc720\ud615).<\/p>\n<p><code>SQLServer:Replica &gt; Log Send Queue<\/code> \uc131\ub2a5 \uce74\uc6b4\ud130\uc5d0 \ub300\ud55c \uac15\ub825\ud55c \ubaa8\ub2c8\ud130\ub9c1\uc744 \uad6c\ud604\ud558\uc2ed\uc2dc\uc624. \ubcf4\uc870 \ubcf5\uc81c\ubcf8\uc774 \uc601\uad6c\uc801\uc73c\ub85c \uc190\uc2e4\ub41c \uacbd\uc6b0 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