{"id":5909,"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":"2026-06-16T16:56:17","modified_gmt":"2026-06-16T16:56:17","slug":"mssql-transakciju-%c5%beurn%c4%81ls-ir-pilns-nov%c4%93r%c5%a1anas-un-%c4%81tras-atkop%c5%a1anas-strat%c4%93%c4%a3ijas","status":"publish","type":"post","link":"https:\/\/cloudsave.app\/lv\/knowledge-base\/mssql-transakciju-%c5%beurn%c4%81ls-ir-pilns-nov%c4%93r%c5%a1anas-un-%c4%81tras-atkop%c5%a1anas-strat%c4%93%c4%a3ijas\/","title":{"rendered":"MSSQL transakciju \u017eurn\u0101ls ir pilns: nov\u0113r\u0161anas un \u0101tras atkop\u0161anas strat\u0113\u0123ijas"},"content":{"rendered":"<p>Datu b\u0101zu administratoriem (DBA) un DevOps in\u017eenieriem, kas p\u0101rvalda Microsoft SQL Server, ir maz br\u012bdin\u0101jumu, kas izraisa tik lielu t\u016bl\u012bt\u0113ju trauksmi k\u0101 9002. k\u013c\u016bda: <em>Datu b\u0101zes &#8216;X&#8217; transakciju \u017eurn\u0101ls ir pilns<\/em>. Kad transakciju \u017eurn\u0101ls aizpild\u0101s un nevar palielin\u0101ties, datu b\u0101ze faktiski k\u013c\u016bst tikai las\u0101ma. Visas <code>INSERT<\/code>, <code>UPDATE<\/code> un <code>DELETE<\/code> darb\u012bbas apst\u0101jas, lietojumprogrammu transakcijas neizdodas, un ra\u017eo\u0161anas process apst\u0101jas.<\/p>\n<p>Izpratne par SQL Server transakciju \u017eurn\u0101la arhitekt\u016bru, prec\u012bza pamatc\u0113lo\u0146a diagnostic\u0113\u0161ana un \u0101tra atkop\u0161anas proced\u016bru izpilde ir kritiski svar\u012bgas prasmes augstas pieejam\u012bbas uztur\u0113\u0161anai. \u0160aj\u0101 visaptvero\u0161aj\u0101 rokasgr\u0101mat\u0101 ir apskat\u012bti transakciju \u017eurn\u0101la meh\u0101nismi, k\u0101 atrisin\u0101t \u017eurn\u0101la p\u0101rpildes probl\u0113mu \u0101rk\u0101rtas situ\u0101cij\u0101 un arhitekt\u016bras lab\u0101k\u0101 prakse, lai nov\u0113rstu t\u0101s atk\u0101rto\u0161anos.<\/p>\n<h2>Izpratne par SQL Server transakciju \u017eurn\u0101la arhitekt\u016bru<\/h2>\n<p>Lai efekt\u012bvi nov\u0113rstu pilna transakciju \u017eurn\u0101la probl\u0113mas, vispirms ir j\u0101saprot, k\u0101 SQL Server raksta un p\u0101rvalda datus.<\/p>\n<h3>Iepriek\u0161\u0113jas rakst\u012b\u0161anas \u017eurn\u0101ls (Write-Ahead Logging \u2014 WAL)<\/h3>\n<p>SQL Server izmanto iepriek\u0161\u0113jas rakst\u012b\u0161anas \u017eurn\u0101la (WAL) protokolu. Ikreiz, kad notiek datu modifik\u0101cija, izmai\u0146as vispirms tiek ierakst\u012btas transakciju \u017eurn\u0101l\u0101 atmi\u0146\u0101, p\u0113c tam izvad\u012btas uz fizisko \u017eurn\u0101la failu disk\u0101, pirms faktisk\u0101s datu lapas tiek atjaunin\u0101tas datu b\u0101zes failos (MDF\/NDF). Tas garant\u0113 ACID (atomit\u0101tes, konsekvences, izol\u0101cijas, iztur\u012bbas) atbilst\u012bbu, nodro\u0161inot, ka av\u0101rijas gad\u012bjum\u0101 SQL Server var atk\u0101rtot (roll forward) vai atsaukt (roll back) transakcijas.<\/p>\n<h3>Virtu\u0101lie \u017eurn\u0101la faili (VLF) un ciklisk\u0101 \u017eurn\u0101lo\u0161ana<\/h3>\n<p>Iek\u0161\u0113ji fiziskais transakciju \u017eurn\u0101la fails (LDF) ir sadal\u012bts maz\u0101kos, lo\u0123iskos segmentos, ko sauc par virtu\u0101lajiem \u017eurn\u0101la failiem (VLF). Transakciju \u017eurn\u0101ls darbojas cikliski. Kad \u017eurn\u0101la ieraksti tiek rakst\u012bti, tie aizpilda vienu VLF un p\u0101riet uz n\u0101kamo.<\/p>\n<p>Kad \u017eurn\u0101ls sasniedz fizisk\u0101 faila beigas, tas m\u0113\u0123ina atgriezties s\u0101kum\u0101. Tom\u0113r tas var p\u0101rrakst\u012bt VLF tikai tad, ja \u0161is VLF ir atz\u012bm\u0113ts k\u0101 <strong>neakt\u012bvs<\/strong>. Ja visi VLF ir akt\u012bvi (tas noz\u012bm\u0113, ka tie satur \u017eurn\u0101la ierakstus, kas SQL Server joproj\u0101m ir nepiecie\u0161ami), \u017eurn\u0101ls nevar atgriezties s\u0101kum\u0101. Ja ir iesp\u0113jota autom\u0101tisk\u0101 palielin\u0101\u0161ana un ir pieejama vieta disk\u0101, fiziskais fails palielin\u0101s. Ja disks ir pilns vai autom\u0101tisk\u0101 palielin\u0101\u0161ana ir ierobe\u017eota, j\u016bs saskarsieties ar 9002. k\u013c\u016bdu.<\/p>\n<h3>\u017durn\u0101la sa\u012bsin\u0101\u0161ana (Truncation) pret \u017eurn\u0101la samazin\u0101\u0161anu (Shrinking)<\/h3>\n<p>Izplat\u012bts nepareizs uzskats ir t\u0101ds, ka \u017eurn\u0101la sa\u012bsin\u0101\u0161ana samazina fizisk\u0101 faila lielumu.<br \/>\n*   <strong>\u017durn\u0101la sa\u012bsin\u0101\u0161ana (Log Truncation):<\/strong> Process, kur\u0101 akt\u012bvie VLF tiek atz\u012bm\u0113ti k\u0101 neakt\u012bvi, padarot vietu pieejamu atk\u0101rtotai izmanto\u0161anai. Tas <em>nesamazina<\/em> LDF faila lielumu disk\u0101.<br \/>\n*   <strong>\u017durn\u0101la samazin\u0101\u0161ana (Log Shrinking):<\/strong> Process, kur\u0101 fiziski tiek samazin\u0101ts LDF faila lielums un vieta tiek atdota oper\u0113t\u0101jsist\u0113mai.<\/p>\n<p>Pilnas atkop\u0161anas model\u012b (Full Recovery model) \u017eurn\u0101la sa\u012bsin\u0101\u0161ana notiek <em>tikai<\/em> tad, kad ir veiksm\u012bgi pabeigta transakciju \u017eurn\u0101la dubl\u0113\u0161ana (pie\u0146emot, ka neviens cits process neuztur \u017eurn\u0101lu akt\u012bvu).<\/p>\n<h2>&#8220;Transakciju \u017eurn\u0101ls ir pilns&#8221; k\u013c\u016bdas (9002. k\u013c\u016bda) diagnostic\u0113\u0161ana<\/h2>\n<p>Kad \u017eurn\u0101ls ir pilns, pirmais solis nav akli pievienot vietu disk\u0101 vai samazin\u0101t failus. Jums ir j\u0101identific\u0113, <em>k\u0101p\u0113c<\/em> \u017eurn\u0101lu nevar sa\u012bsin\u0101t. SQL Server nodro\u0161ina ieb\u016bv\u0113tu meh\u0101nismu, lai prec\u012bzi pateiktu, kas ne\u013cauj atk\u0101rtoti izmantot \u017eurn\u0101lu, izmantojot <code>sys.databases<\/code> kataloga skatu.<\/p>\n<p>Izpildiet \u0161o T-SQL komandu, lai identific\u0113tu v\u0101jo vietu:<\/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>Varat ar\u012b p\u0101rbaud\u012bt pa\u0161reiz\u0113jo transakciju \u017eurn\u0101lu vietas izmantojumu, izmantojot:<\/p>\n<pre><code class=\"language-sql\">DBCC SQLPERF(LOGSPACE);\n<\/code><\/pre>\n<h3>Bie\u017e\u0101kie <code>log_reuse_wait_desc<\/code> st\u0101vok\u013ci<\/h3>\n<ol>\n<li><strong>LOG_BACKUP:<\/strong> Datu b\u0101ze izmanto pilnas vai bulk-logged atkop\u0161anas modeli, un transakciju \u017eurn\u0101la dubl\u0113jums p\u0113d\u0113j\u0101 laik\u0101 nav veikts. Tas ir visizplat\u012bt\u0101kais iemesls.<\/li>\n<li><strong>ACTIVE_TRANSACTION:<\/strong> Ilgsto\u0161a transakcija (piem\u0113ram, masveida indeksa atjauno\u0161ana vai aizmirsta neapstiprin\u0101ta transakcija) uztur \u017eurn\u0101lu akt\u012bvu.<\/li>\n<li><strong>REPLICATION \/ CDC:<\/strong> Ir iesp\u0113jota transakciju replik\u0101cija vai Change Data Capture (CDC), un Log Reader Agent v\u0113l nav apstr\u0101d\u0101jis transakcijas.<\/li>\n<li><strong>AVAILABILITY_REPLICA:<\/strong> AlwaysOn Availability Group grup\u0101 sekund\u0101r\u0101 replika ir atvienota vai sinhroniz\u0113jas p\u0101r\u0101k l\u0113ni, piespie\u017eot prim\u0101ro repliku saglab\u0101t \u017eurn\u0101la ierakstus, l\u012bdz tie ir nostiprin\u0101ti sekund\u0101raj\u0101 replik\u0101.<\/li>\n<\/ol>\n<h2>\u0100tr\u0101s atkop\u0161anas strat\u0113\u0123ijas: Probl\u0113mas risin\u0101\u0161ana ra\u017eo\u0161anas vid\u0113<\/h2>\n<p>Atkar\u012bb\u0101 no atgriezt\u0101 <code>log_reuse_wait_desc<\/code>, j\u016bsu \u0101rk\u0101rtas reakcija at\u0161\u0137irsies. \u0160eit ir \u0101tr\u0101s atkop\u0161anas strat\u0113\u0123ijas visizplat\u012bt\u0101kajiem scen\u0101rijiem.<\/p>\n<h3>1. scen\u0101rijs: Tr\u016bksto\u0161i vai neizdevu\u0161ies \u017eurn\u0101la dubl\u0113jumi (<code>LOG_BACKUP<\/code>)<\/h3>\n<p>Ja gaid\u012b\u0161anas veids ir <code>LOG_BACKUP<\/code>, risin\u0101jums ir vienk\u0101r\u0161s: jums ir j\u0101veic transakciju \u017eurn\u0101la dubl\u0113\u0161ana.<\/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>Kad dubl\u0113\u0161ana ir pabeigta, neakt\u012bvie VLF tiks sa\u012bsin\u0101ti, un SQL Server ats\u0101ks norm\u0101lu darb\u012bbu. Ja j\u016bsu dubl\u0113juma disks ir pilns, iesp\u0113jams, b\u016bs j\u0101veic dubl\u0113\u0161ana uz pagaidu t\u012bkla koplietojumu vai null ier\u012bci (\u013coti nav ieteicams, ja vien datu b\u0101ze nav viegli reproduc\u0113jama, jo tas p\u0101rtrauc \u017eurn\u0101la \u0137\u0113di):<\/p>\n<pre><code class=\"language-sql\">-- BR\u012aDIN\u0100JUMS: Tas p\u0101rtrauc \u017eurn\u0101la \u0137\u0113di un apdraud atkop\u0161anu uz noteiktu laiku.\n-- Izmantojiet tikai tad, ja tas ir absol\u016bti nepiecie\u0161ams, un nekav\u0113joties veiciet PILNU dubl\u0113jumu.\nBACKUP LOG [YourDatabaseName] TO DISK = 'NUL';\n<\/code><\/pre>\n<h3>2. scen\u0101rijs: Ilgsto\u0161as akt\u012bv\u0101s transakcijas (<code>ACTIVE_TRANSACTION<\/code>)<\/h3>\n<p>Ja viena transakcija ir darbojusies stund\u0101m ilgi, t\u0101 nov\u0113r\u0161 \u017eurn\u0101la sa\u012bsin\u0101\u0161anu visu t\u0101s darb\u012bbas laiku. Vispirms identific\u0113jiet problem\u0101tisko transakciju:<\/p>\n<pre><code class=\"language-sql\">DBCC OPENTRAN('YourDatabaseName');\n<\/code><\/pre>\n<p>\u0160\u012b komanda atgrie\u017e vec\u0101ko akt\u012bvo transakciju un t\u0101s Server Process ID (SPID). Varat ieg\u016bt s\u012bk\u0101ku inform\u0101ciju par to, ko dara SPID, vaic\u0101jot dinamiskos p\u0101rvald\u012bbas skatus (DMV):<\/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>Ja transakcija ir negod\u012bgs vaic\u0101jums vai iestr\u0113dzis process, iesp\u0113jams, b\u016bs j\u0101p\u0101rtrauc tas, lai atbr\u012bvotu \u017eurn\u0101lu.<\/p>\n<pre><code class=\"language-sql\">KILL &lt;SPID&gt;;\n<\/code><\/pre>\n<p><em>Piez\u012bme: Mas\u012bvas transakcijas p\u0101rtrauk\u0161ana izrais\u012bs atcel\u0161anu (rollback), kas var aiz\u0146emt iev\u0113rojamu laiku un \u012bslaic\u012bgi rad\u012bs papildu \u017eurn\u0101la darb\u012bbu. Restart\u0113\u0161anas laik\u0101 nep\u0101rtrauciet SQL Server pakalpojumu, pret\u0113j\u0101 gad\u012bjum\u0101 datu b\u0101ze p\u0113c restart\u0113\u0161anas p\u0101ries atkop\u0161anas re\u017e\u012bm\u0101.<\/em><\/p>\n<h3>3. scen\u0101rijs: \u0100rk\u0101rtas vietas pie\u0161\u0137ir\u0161ana (disks ir 100% pilns)<\/h3>\n<p>Ja LDF fails ir pat\u0113r\u0113jis visu disku, j\u016bs pat nevarat veikt dubl\u0113\u0161anu, jo SQL Server ir nepiecie\u0161ama neliela \u017eurn\u0101la vieta, lai ierakst\u012btu pa\u0161u dubl\u0113\u0161anas notikumu. \u0160aj\u0101 scen\u0101rij\u0101 jums ir j\u0101pievieno sekund\u0101rais \u017eurn\u0101la fails cit\u0101 disk\u0101, kur\u0101 ir pieejama vieta.<\/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>Tas nekav\u0113joties nodro\u0161ina SQL Server ar vietu darb\u012bbai. Kad datu b\u0101ze ir tie\u0161saist\u0113, veiciet transakciju \u017eurn\u0101la dubl\u0113jumu, iztuk\u0161ojiet sekund\u0101ro \u017eurn\u0101la failu un no\u0146emiet to:<\/p>\n<pre><code class=\"language-sql\">-- 1. Veiciet \u017eurn\u0101la dubl\u0113jumu, lai sa\u012bsin\u0101tu \u017eurn\u0101lu\nBACKUP LOG [YourDatabaseName] TO DISK = '...';\n\n-- 2. Iztuk\u0161ojiet pagaidu \u017eurn\u0101la failu\nDBCC SHRINKFILE (N'YourDatabaseName_Log2', EMPTYFILE);\n\n-- 3. No\u0146emiet pagaidu \u017eurn\u0101la failu\nALTER DATABASE [YourDatabaseName] REMOVE FILE [YourDatabaseName_Log2];\n<\/code><\/pre>\n<h2>Lab\u0101k\u0101 prakse transakciju \u017eurn\u0101la nov\u0113r\u0161anai un p\u0101rvald\u012bbai<\/h2>\n<p>Reakt\u012bv\u0101 probl\u0113mu nov\u0113r\u0161ana ir saspringta un ietekm\u0113 SLA. Proakt\u012bvas arhitekt\u016bras un darb\u012bbas lab\u0101k\u0101s prakses ievie\u0161ana ir b\u016btiska uz\u0146\u0113muma datu b\u0101zes stabilit\u0101tei.<\/p>\n<h3>1. Ieviesiet stabilu, automatiz\u0113tu dubl\u0113\u0161anas strat\u0113\u0123iju<\/h3>\n<p>Ja datu b\u0101ze izmanto pilnas atkop\u0161anas modeli, bie\u017ea transakciju \u017eurn\u0101la dubl\u0113\u0161ana ir oblig\u0101ta. Atkar\u012bb\u0101 no j\u016bsu atkop\u0161anas punkta m\u0113r\u0137a (RPO) un transakciju apjoma, \u017eurn\u0101la dubl\u0113jumiem j\u0101notiek ik p\u0113c 5 l\u012bdz 15 min\u016bt\u0113m.<\/p>\n<p>Uz\u0146\u0113muma dubl\u0113\u0161anas risin\u0101jumi, piem\u0113ram, CloudSave, iev\u0113rojami vienk\u0101r\u0161o \u0161o procesu. Integr\u0113joties tie\u0161i ar SQL Server, izmantojot VDI (Virtual Device Interface), CloudSave \u013cauj DBA konfigur\u0113t uz politiku balst\u012btus, augstas frekvences transakciju \u017eurn\u0101la dubl\u0113jumus. Tas nodro\u0161ina, ka \u017eurn\u0101li tiek nep\u0101rtraukti sa\u012bsin\u0101ti, dro\u0161i \u0161ifr\u0113ti un glab\u0101ti \u0101rpus vietnes vai nemain\u012bg\u0101 m\u0101ko\u0146kr\u0101tuv\u0113, nov\u0113r\u0161ot <code>LOG_BACKUP<\/code> gaid\u012b\u0161anas st\u0101vokli bez nepiecie\u0161am\u012bbas p\u0113c sare\u017e\u0123\u012btiem piel\u0101gotiem SQL Agent darbiem.<\/p>\n<h3>2. Pareizi izm\u0113riet transakciju \u017eurn\u0101lu un p\u0101rvaldiet VLF<\/h3>\n<p>Pa\u013cau\u0161an\u0101s uz autom\u0101tisko palielin\u0101\u0161anu, lai p\u0101rvald\u012btu transakciju \u017eurn\u0101la lielumu, ir b\u012bstams pretmodelis. Autom\u0101tisk\u0101s palielin\u0101\u0161anas darb\u012bbas ir d\u0101rgas un aptur transakciju apstr\u0101di, kam\u0113r disks tiek inicializ\u0113ts ar null\u0113m (ja vien nav iesp\u0113jota t\u016bl\u012bt\u0113ja faila inicializ\u0101cija, kas <em>neattiecas<\/em> uz \u017eurn\u0101la failiem).<\/p>\n<p>Turkl\u0101t bie\u017ea, maza autom\u0101tisk\u0101 palielin\u0101\u0161ana (piem\u0113ram, palielin\u0101\u0161ana par 10% vai 50 MB vienlaikus) noved pie <strong>VLF fragment\u0101cijas<\/strong>. Transakciju \u017eurn\u0101ls ar t\u016bksto\u0161iem mazu VLF iev\u0113rojami pasliktin\u0101s datu b\u0101zes start\u0113\u0161anas laiku, dubl\u0113\u0161anas veiktsp\u0113ju un replik\u0101cijas latentumu.<\/p>\n<ul>\n<li><strong>Iepriek\u0161 iestatiet \u017eurn\u0101la lielumu:<\/strong> Analiz\u0113jiet savas liel\u0101k\u0101s uztur\u0113\u0161anas darb\u012bbas (piem\u0113ram, indeksa atjauno\u0161anu) un iepriek\u0161 iestatiet LDF faila lielumu, lai t\u0101s var\u0113tu veikt bez palielin\u0101\u0161anas.<\/li>\n<li><strong>Iestatiet fiks\u0113tu autom\u0101tisko palielin\u0101\u0161anu:<\/strong> Mainiet autom\u0101tisko palielin\u0101\u0161anu no procentiem uz fiks\u0113tu lielumu (piem\u0113ram, 1 GB vai 5 GB), lai nodro\u0161in\u0101tu, ka VLF tiek izveidoti vesel\u012bg\u0101 lielum\u0101.<\/li>\n<\/ul>\n<p>Varat p\u0101rbaud\u012bt savu VLF skaitu, izmantojot \u0161\u0101du vaic\u0101jumu (SQL Server 2017+):<\/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>Ja j\u016bsu VLF skaits p\u0101rsniedz 500, apsveriet iesp\u0113ju pagaid\u012bt klus\u0101ku periodu, samazin\u0101t \u017eurn\u0101lu l\u012bdz minim\u0101lajam lielumam un manu\u0101li palielin\u0101t to atpaka\u013c l\u012bdz vajadz\u012bgajam lielumam lielos gabalos.<\/p>\n<h3>3. Optimiz\u0113jiet indeksa uztur\u0113\u0161anas darb\u012bbas<\/h3>\n<p>Indeksu atjauno\u0161ana ir piln\u012bb\u0101 \u017eurn\u0101lotas darb\u012bbas, pat Bulk-Logged atkop\u0161anas model\u012b (atkar\u012bb\u0101 no indeksa veida). 500 GB indeksa atjauno\u0161ana rad\u012bs vismaz 500 GB transakciju \u017eurn\u0101la ierakstu.<\/p>\n<p>Lai mazin\u0101tu \u017eurn\u0101la piep\u016b\u0161anos uztur\u0113\u0161anas laik\u0101:<br \/>\n*   Izmantojiet <code>SORT_IN_TEMPDB = ON<\/code>, atjaunojot indeksus. Tas p\u0101rvirza k\u0101rto\u0161anas f\u0101zi uz TempDB, samazinot slodzi uz lietot\u0101ja datu b\u0101zes transakciju \u017eurn\u0101lu.<br \/>\n*   Ja iesp\u0113jams, p\u0101rsl\u0113dzieties no indeksa <em>atjauno\u0161anas<\/em> uz indeksa <em>reorganiz\u0101ciju<\/em>, jo reorganiz\u0101cijas ir efekt\u012bv\u0101kas \u017eurn\u0101la izmanto\u0161an\u0101 un t\u0101s var p\u0101rtraukt, neatce\u013cot visu darb\u012bbu.<br \/>\n*   Veiciet lielu <code>DELETE<\/code> vai <code>UPDATE<\/code> darb\u012bbu pake\u0161u apstr\u0101di. T\u0101 viet\u0101, lai vien\u0101 transakcij\u0101 izdz\u0113stu 10 miljonus rindu, izdz\u0113siet t\u0101s 50 000 rindu blokos, apstiprinot un \u013caujot \u017eurn\u0101la dubl\u0113jumiem sa\u012bsin\u0101t \u017eurn\u0101lu starp pake\u0161u apstr\u0101d\u0113m.<\/p>\n<h3>4. Uzraugiet augstas pieejam\u012bbas un replik\u0101cijas topolo\u0123ijas<\/h3>\n<p>AlwaysOn Availability Groups grup\u0101 prim\u0101r\u0101 replika nevar sa\u012bsin\u0101t savu \u017eurn\u0101lu, l\u012bdz \u017eurn\u0101la ieraksti ir nostiprin\u0101ti vis\u0101s sinhronaj\u0101s un asinhronaj\u0101s sekund\u0101raj\u0101s replik\u0101s.<\/p>\n<p>Ja sekund\u0101r\u0101 replika k\u013c\u016bst bezsaist\u0113 vai ja t\u012bkla joslas platums nesp\u0113j sekot l\u012bdzi prim\u0101r\u0101s replikas transakciju \u0123ener\u0113\u0161anas \u0101trumam, prim\u0101r\u0101s replikas s\u016bt\u012b\u0161anas rinda pieaugs, un \u017eurn\u0101ls aizpild\u012bsies (<code>AVAILABILITY_REPLICA<\/code> gaid\u012b\u0161anas veids).<\/p>\n<p>Ieviesiet stabilu uzraudz\u012bbu <code>SQLServer:Replica &gt; Log Send Queue<\/code> veiktsp\u0113jas skait\u012bt\u0101jam. Ja sekund\u0101r\u0101 replika ir neatgriezeniski zaud\u0113ta, t\u0101 ir j\u0101no\u0146em no Availability Group vai j\u0101aptur datu p\u0101rvieto\u0161ana, lai prim\u0101rais \u017eurn\u0101ls var\u0113tu sa\u012bsin\u0101ties.<\/p>\n<h2>Secin\u0101jums<\/h2>\n<p>Saskar\u0161an\u0101s ar pilnu transakciju \u017eurn\u0101lu ir datu b\u0101zu administratoru ikdiena, ta\u010du tai nav j\u0101beidzas ar ilgsto\u0161u d\u012bkst\u0101vi. Izprotot iepriek\u0161\u0113jas rakst\u012b\u0161anas \u017eurn\u0101la un VLF meh\u0101nismus, varat \u0101tri diagnostic\u0113t pamatc\u0113lo\u0146us, izmantojot <code>sys.databases<\/code>, un piem\u0113rot pareizo \u0101tr\u0101s atkop\u0161anas strat\u0113\u0123iju.<\/p>\n<p>Ilgtermi\u0146a stabilit\u0101te ir atkar\u012bga no atteik\u0161an\u0101s no reakt\u012bviem labojumiem. \u017durn\u0101la failu iepriek\u0161\u0113ja izm\u0113ra noteik\u0161ana, uztur\u0113\u0161anas rut\u012bnu optimiz\u0113\u0161ana un uz\u0146\u0113muma l\u012bme\u0146a dubl\u0113\u0161anas platformu, piem\u0113ram, CloudSave, izmanto\u0161ana, lai ieviestu stingrus, automatiz\u0113tus \u017eurn\u0101la dubl\u0113\u0161anas grafikus, nodro\u0161in\u0101s, ka j\u016bsu transakciju \u017eurn\u0101li paliek vesel\u012bgi, sa\u012bsin\u0101ti un gatavi atbalst\u012bt augstas caurlaidsp\u0113jas ra\u017eo\u0161anas darba slodzes.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>** Discover expert strategies for preventing and resolving MSSQL transaction log full errors (Error 9002). 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