Transaction log is a list/history of modification executed by a database management system to guarantee ACID properties over crashes or hardware failures.

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Database logs that contain attack traces [closed]

Is there a publicly available logs of database queries (could be any SQL or NOSQL) that contains attack traces ( attacks could be exfiltration, misuse, insider, anomaly or any attacks). Needed for ...
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1answer
64 views

Index creation leads to large transaction log growth

I have an approximately 1 billion row table. I then create an index as follows: CREATE NONCLUSTERED INDEX [IX_Index1] ON [dbo].[MyTable]( [CustomerID] ASC ) -- CustomerID is uniqueidentifier WITH ...
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25 views

Secondary database log file in alwayson is very big [duplicate]

I have an alwayson environment (AlwaysOn AG). Database [UsersDb] in the slave server, His log file is very big . How can I reduce his size(shrink)?
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1answer
42 views

Create a stored-procedure to insert multiple rows on a junction table and other tables

I am new to Databases and Design and needs some help on a INSERT issue. I want to create a procedure that will insert multiple values to different tables, I need to make sure it stays atomic so I need ...
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2answers
72 views

Reclaim Transaction Log space of SQL Server

I have a SQL Server databases for which log files have grown huge. I have log backup scheduled to run only once a day. But now all the disk space is used by these log files. Can anyone help me ...
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3answers
153 views

Keeping (Partial) Backups Small when using SQL Server FILESTREAM

I have a database with nearly 1TB of FILESTREAM data that I don't need backed up (if the data was deleted it'd be recreated automatically in a couple of hours, so it just isn't important). Most of the ...
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4answers
123 views

Is it enough to have only full backup and transaction log backup only for a good backup plan?

If Full backup is scheduled for every Sunday at 12 pm and differential back up is scheduled for for every 6 hours and transaction log backup is scheduled for every 15 minutes. My problem is what is ...
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1answer
35 views

Clear out remnant LDF log files of Sharepoint DB not visible on SBS 2008 Domain Server?

Typical ways for dealing with LDF files that take up a lot of space, recommend these processes to shrink/ eliminate the drive space being occupied. ...
3
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1answer
66 views

Tempdb log file was growing continuously on SQL Server 2008 R2-SP2. Could a pending insert statement which uses temporary table be a cause?

I just started at my new job as a DBA. All of a sudden, we started getting alerts about disk space. When looked into it, I found that tempdb log file was growing continuously. There was an active ...
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0answers
18 views

MySQL quick database transfer between two servers

I am migrating a reasonably large (18GB) database used for a website from one server to another. There are two tables which make up 95% of that size and they do not have to be fully transferred for ...
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1answer
32 views

SQL Server 2014 log growing just in Navision 2015 just when always on is active

My question is about if anybody can help me to find out why my LOG file growing to more than 2T just when I activate ALWAYS ON in my NAVISION database. I have more databases in my SQL Server 2016 and ...
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36 views

The transaction log for database is full due to 'ACTIVE_TRANSACTION' [duplicate]

We are facing problems related to transaction logs becoming full. The transaction log for database is full due to 'ACTIVE_TRANSACTION' My database logs are becoming full after every 4-5 days ...
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1answer
46 views

Backup transaction log from secondary database in alwayson AG

Is it possible to do the log backup from the secondary databases in the AG?
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1answer
49 views

Can't do a full backup because the log is full [duplicate]

I have a server with 25GB of free space. The software stopped working because the transaction log is full. I noticed that the database has two logs files; one is 45Gb and the other is 65Gb. I think ...
0
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1answer
20 views

How to restore a transaction log

Could you tell me the reason why it is mandatory to restore the full backup with NORECOVERY option before restoring the transaction log? otherwise Transaction log is always grayed (Task -> restore -> ...
2
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1answer
70 views

backup log larger than log file

Today I noticed that the backup of the log of our database was 18GB but the size of the log file is only 8GB. I used the following command to backup: BACKUP LOG [myDB] TO DISK = ...
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2answers
74 views

Backup Strategy for Transaction Log. Tail or Standard Log Backup?

We are forced to perform some essential maintenance on one of our production environments. Instructions from the vendor state the recovery model of the database should be set to SIMPLE before the work ...
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0answers
17 views

3023 : File serialization issue with transaction log backups

I am trying to take a transaction log backup on one of the AO replica servers. It throws an error saying that backup operations must be serialized. I googled this and found that only one backup should ...
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1answer
60 views

Sql Server log: is 'Backup|Log was backed up' the same as 'BackupDatabase: Log files done'?

One transaction log file is growing and growing for a couple of days and I can't find out why. Now I figured out that either the way the activities are stored in the sql logfile OR the behaviour of ...
2
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1answer
56 views

Why can a log backup not be taken without first taking a full backup?

I've created a new database using the FULL recovery model. Now I am trying to take a log backup without first taking a full backup. I'm aware that SQL Server won't allow us to do so, but I want to ...
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1answer
41 views

Will an hourly T-Log backup in a Maintenance plan write a file if there are no changes to a DB?

I have an hourly maintenance plan the runs a T-Log backup. Some of my databases may have every hour represented in the file system, while others have some hours "missing" or even none at all. Is it ...
1
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1answer
95 views

What is the role of eager writer?

What is the role of eager writer? How this process works internally in SQL server? What is the major difference between eager writer and lazy writer/checkpoint? My understanding here is, that both ...
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1answer
27 views

Transaction Log file size is increasing in my Azure (IAAS) SQL Server 2014 database [duplicate]

Recently we have migrated our application (both web app and database) to Azure (IASS). There we have a VM with SQL Server 2014 installed. Also I have restored all the necessary databases and SQL ...
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0answers
19 views

Hsqldb transaction log rollback cause

I'm fairly new to the database world but I had to use an hsqldb-2.0.0 database for a netflow collector software. As the software shows no output even if the client is collecting the flows I ...
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0answers
45 views

SQL server database log full for application databases [duplicate]

We have an issue that our application database gets log full because we have a schedule job to write to a flat table for reporting purpose every hour in the application database. I wonder if we should ...
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1answer
53 views

Transaction log rollback broke Log Shipping chain?

Is it correct that performing a transaction log restore to a previous point in time will break the log shipping chain? If this is correct, is there a way to recover from this situation without having ...
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50 views

LogFile Size increases by SSIS Package execution

On production server we have 125 GB free space. The SSIS package is doing some delete in Transaction. e.g. Insert 3 columns which are mainly business keys into a staging table and then deleting the ...
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2answers
32 views

Transaction log backups cleaning

I have a quick question regarding the cleaning of no longer necessary transaction log backups. So, I have a database in FULL recovery mode. Every night, at 10 PM a backup takes place (via maintenance ...
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2answers
87 views

How exactly the row visibility is determined?

In the simplest case, when we insert a new row into a table (and the transaction commits), it will be visible to all subsequent transactions. See xmax being 0 in this example: CREATE TABLE vis ( ...
3
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1answer
154 views

The transaction log for database 'database' is full due to 'LOG_BACKUP'. Nothing works

I have about 30 databases on SQL server 2012. One of the databases is erroring with "The transaction log for database 'database' is full due to 'LOG_BACKUP'." I have spent several hours googling and ...
0
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2answers
72 views

How many log files does a database usually have? [duplicate]

I'm studying SQL Server. I have read that a database can have several data files and one log file, but recently I was heard that a database can have more than one log file. Is this true?
2
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1answer
38 views

High Log Space Used for model System database

I was running DBCC SQLPERF(LOGSPACE) and noticed that while my user databases have nice, low Log Space Used percentages, my model system database is currently at 98%. I have it set to the default Full ...
0
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1answer
45 views

Reduce the allocated size of a DB file [duplicate]

Is it possible to reduce the initial log-file size of a DB. See the screen-shoot below, the log-file shouldn't be more than 500 MB with an autogrowth of 100 MB. I dont want to shrink the file, i want ...
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1answer
53 views

Why isn't transaction log free space always reused?

After monitoring the Transaction log files for a while I noticed that some of them sometimes behave in a way I did not expect. Here are two samples for comparison. All data is based on EXEC('DBCC ...
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1answer
39 views

Redefine Transaction log size restricion fails

I am trying to set the transaction log's max size restriction to UNRESTRICTED using SSMS using the following dialogue: The actual setting is set to 2.097.152 MB - a nonsense value that exceeds the ...
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10 views

Any way to view the list of commited transactions in a period of time?

I want to view the list of commited transactions to my oracle database that users have issued today for exemple. Is that possible ?
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1answer
65 views

Get Table Name from Transaction Log query

I can't figure out why this join isn't working to return the table name when querying the transaction log file. SELECT [Transaction ID], [Current LSN], PartitionId, sp.object_id, ...
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0answers
72 views

LOG BACKUP is TRUNCATING in Log Shipping

I had configured Log shipping from INSTANCE1 to INSTANCE2. For the past few days, am able to find that the log backup is truncating only at the midnight. Due to this, LSRestore Job in INSTANCE2 got ...
3
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1answer
58 views

How is an Active Log different from MinLSN?

MinLSN is the LSN of the oldest uncommitted transaction: What exactly does Active Log hold? Isn't it supposed to hold all the uncommitted transactions? Does it hold any other log records which are ...
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1answer
56 views

How does a transaction log backup deal with active log?

What happens to the log records that maintain any open uncommitted transactions when a transaction log backup starts? Will these records also be included in the log backup?
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70 views

SQL Server 2012 - log shipping issue

I'm sort of new to SQL Server so bear if the doubts are silly. I have configured log shipping for my DR purpose. SQL Server 2012 is the version. Today I encountered the following error in my log ...
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2answers
71 views

Which TLogs are causing large block change in SAN snap?

The environment is SQL Server 2014 Enterprise Edition, NetApp storage managed by CommVault Simpana. We have 100 dbs setup on an instance, all TLogs are on the same Volume. The SAN Admin has setup ...
5
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1answer
225 views

Run Transaction Log backups only during Work hours?

Currently we have a number of databases that are in full recovery model. This is a conscious decision. We also run the transaction log backups every 15 minutes. But we run the transaction log ...
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0answers
27 views

Does Postgresql have a transaction log?

My question is pretty simple; does postgresql have something similar to the transaction log in SQL Server? If so, how do you access it to truncate dead transactions, or set what size it should be? ...
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15 views

Do all types NoSQL databases have a transaction log?

Do all types NoSQL databases have a transaction log? It seems to me that there should be at least one type that doesn't but I don't know which one.
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1answer
27 views

Why is Log File Auto Grow sometimes performed by my application user and sometimes by sa?

Many database tasks (including Data File Auto Grow, Log File Auto Shrink, and Data File Auto Shrink) are completed only by the sa user, but Log File Auto Grow seems to be associated with both sa and ...
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1answer
64 views

Shrink Transaction Log While Using AlwaysOn Availability Group 2014

I'm running a SQL Server 2014 Availability Group with a single secondary in asynchronous mode. My logs in all the Availability Group databases keep growing and the built-in shrink tool only takes ...
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2answers
67 views

Database BackupSize has Changed after migration from SQL Server 2012 Exterprise to SQL Server 2012 Express [closed]

I would like to say that after migration of MS SQL server 2012 Enterprise to MS SQL Server 2012 Express. I have seen there is some subtle diffence in DB backupsize as well as in "LSN" of all ...
2
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1answer
91 views

Can I truncate log in simple recovery mode? [duplicate]

I have a few SQL Server 2005 databases in simple recovery mode. The disk volume in which my transaction logs are stored had only 1GB free, when I started a stored procedure (massive delete in a single ...
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10 views

how to clear the postgrsql-9.1-main-log

Is there an easy way to clear the logfile of postgresql? the logfile is 6044 MB, can you use cp /dev/null file-name or do you mess up the database?