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worry. I will explain what the transaction is and the mechanism behind the transaction log record. Then, I will show you how to use the information stored in the database transaction log file to bring the database back to a consistent and available state after the system DB
In front of the actual problems encountered because of the actual operation of using transaction log backup to restore data, I think it is necessary to straighten out the knowledge of the transaction log, then use a few time to systematically summarize the basic principles of trans
Tags: manipulating style max snippet multiple statement results one SouthOriginal: SQL Server updatable subscription Queue Reader Agent error: An attempted insert or update has failedToday it is found that the Queue Reader Agent keeps trying to start but always goes wrong:The contents are as follows:This may be caused by another problem that has just been dealt w
In today's article, I want to discuss in detail how the transaction logs in in-memory OLTP are written to the transaction log. As we all know, in-memory OLTP provides you with 2 persistence (durability) options for your memory-optimized table (Optimized Tables): Schema_only Schema_and_data Today I don't want to talk more about schema_only, becau
The SQL Server transaction log may be filled, which prevents subsequent database operations, including update, DELETE, INSERT, and checkpoint. Filling the transaction log will result in a 1105 error: Can ' t allocate space for object syslogs in database dbname because The lo
database to be created, @ data_folder = n' E: \ TempFile \ distribution' -- directory of the Distribution database data file, @ data_file = n' distribution '-- Name of the database file, @ data_file_size = 5 -- Initial data file size, in MB (MB), @ log_folder = n' E: \ TempFile \ Distribution '---- directory for distributing database log files, @ log_file = n' distribution _ log ', @ log_file_size = 5 -- I
ArticleDirectory 14.3 generate backup Sets 14.3 generate backup Sets Through the previous study, we have learned that the SQL Server 2005 database provides the function to restore the database status to the fault occurrence point. However, the smooth execution of these functions requires some prerequisites. For example, the online log cannot be damaged. Otherwise, the
Q1. Why the log space cannot grow even if the recovery mode is Full-recovery?A:This is because that the Full-recovery mode takes effect if the user set the Full-recovery mode and do the full- Backup operation. This means if user create a new database and set the recovery mode to full or change the recovery mode of a Databa The behavior of the transaction log is t
Tags: Start log transaction isolation serialization read change PNG duplicate updateAbout the SQL Server transaction isolation level, the Baidu Encyclopedia is described in this way Isolation level: The degree to which a transaction must be isolated from a resource or data c
This is the fifth article in the series and a supplement to the previous log series. If you do not have a systematic understanding of the basic concepts of logs, refer to the articles in this series: about transaction logs in SQLServer (1) ---- physical and logical architecture of transaction logs talking about transaction
The SQL Server transaction log may be filled, which blocks subsequent database operations, including update, DELETE, INSERT, and checkpoint. Full transaction log fills can cause 1105 errors: Can ' t allocate space for object syslogs in database dbname because The logsegment
The SQL Server transaction log may be filled, which blocks subsequent database operations, including update, DELETE, INSERT, and checkpoint. Full transaction log fills can cause 1105 errors: Can ' t allocate space for object syslogs in database dbname because The logsegmen
flashback_transaction_query t 2 where table_owner = 'hr' 3 and lower (t. table_name) = 'ployees' 4 and t. commit_timestamp> paiimestamp-interval '90' minute 5 order by t. commit_scn; XID COMMIT_SCN -------------------------- 20174005e010000 2948380 0E0019005E010000 2948386 SQL> declare2 xids sys. xid_array;3 begin4 xids: = sys. xid_array ('00004005e010000 ');5 dbms_flashback.transaction_backout (1, xids, options => dbms_flashback.cascade );6 end;7/D
The transaction log for database 'xx' is full, Error: 9002, Severity: 17, State: severity Check database logs with the following error message: Error: 9002, Severity: 17, State: 4.The transaction log for database 'SharedServices1_Search_DB' is full. To find out why space in the lo
transaction is active (all recovery modes ).· A long-running transaction may exist at the beginning of log backup. In this case, another log backup may be required to free up space. For more information, see the "long-running Active transactions" section after this topic.· The tra
, resulting in a non repeatable read or Phantom Data. This option is the default value for SQL Server. Avoid dirty reads and cannot modify existing data in other sessions in a transaction. Shared locks. READ UNCOMMITTED Performs a dirty read or level 0 isolation lock, which means that no shared locks are issued and exclusive locks are not accepted. When you set this option, you can
can be changed before the end of the transaction, resulting in non-repeated reading or Phantom data. This option is the default value of SQL Server. Avoid dirty reads and do not modify existing data in other sessions in the transaction. Shared lock. Read uncommitted Execute dirty read or 0-level isolation lock, which means no shared lock is issued or the
Check the database log, with the following error message: error:9002, Severity:17, State:4. The transaction log for database ' sharedservices1_search_db ' are full. To find out why spaces in the log cannot be reused, and the Log_reuse_wait_desc column in sys.databases To view the usage of the current
First look at the concept: Differential backup:Differential backup is for full backup: All files that change after the last full backup are backed up. (During differential backup, only the marked files and folders are backed up. It does not clear the mark, that is, it is not marked as a backup file after backup, in other words, it does not clear the archive attribute) Transaction Log backup:The
This article was reproduced from the blog http://www.cnblogs.com/lyhabc/archive/2013/06/10/3130856.html of the BirchQueries on SQL Server database transaction logsI can't touch SQL Server.Experimental environment: SQLSERVER2005 SP4,WINDOWS7I was not in the mood to write articles, anyway, no one to read, about my article mentioned in the question, some can be from
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