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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SQL Server automatic transaction log truncation

Have looked through msdn but cant find answers to these: Any help much appreciated: In simple recovery mode: Is there any TSQL or alternative functionality that will provide a notification either ...
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Shrink transaction log while transaction in progress

I have a several-GB import into my SQL Server 2005 (Standard Edition) database. The import is separated into 4 parts, each part in its own transaction. As you can guess, the transaction log files ...
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Oracle 11g see transaction or session start time

I want to know when a session or transaction started. The deadlock file doesn't give me this information. Is there some logfile that keeps these records? I've got a transaction id "TX-1234-abcd", a ...
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SQL Server 2008 log file growing and wont shrink. Hard Drive Space running out [duplicate]

I have a SQL Server 2008 database which has a log file (.ldf) with a size of 360GB and growing every day. The .mdf file is only 25GB. The hard drive is 950 GB and has 150GB free space. I want to ...
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How large will the Transaction Log backup be?

I encountered a production database of 12 GB with a log of 90 GB. Full and differential database backups are made with a third-party backup tool, but no one is backing up the transaction log so it got ...
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Can I decrypt TDE transaction log files for use with 3rd party software?

Is there a way to decrypt TDE log files on disk for use with 3rd party software? I have the original key and certificates. I am trying to use the transaction files with a 3rd party tool in order to ...
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98 views

Log file growth issues

We're consolidating data from a bunch of databases into four reporting databases each night. Because the entire dataset is imported each night we do not need to be able to restore the data to a point ...
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611 views

Does creating / updating statistics have an impact on the transaction log?

Does creating or updating statistics, assuming on a large table, create significant (or at all) transaction log churn? I would think not as it does not change the underlying data or structure. If it ...
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When performing a cross-database transaction, in which transaction log(s) is the information stored?

Given the following snippet: -- error checking omitted for brevity begin tran exec database1..my_stored_procedure exec database2..my_other_stored_procedure if (@@error <> 0) rollback ...
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Can I shrink the transaction log file on a mirror database?

This is a followup question to a previous question about why I couldn't shrink the log file on the principal database. To make a long story short, I setup database mirroring but forgot to make sure ...
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How do I shrink the physical Transaction Log file when it's the principal in a mirror?

We setup database mirroring over the weekend, and forgot to re-enable the job that backs up the transaction logs. When I came in this morning, the transaction log had ballooned to 58GB, and was taking ...
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Time to apply transaction logs: does it matter how many logs?

When restoring from a backup in SQL Server, the procedure is to restore the .bak file and then apply any .trn files since the last full backup. Does it make a difference how many .trn files there ...
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Reducing high VLF count

I have been using Brent Ozar's sp_blitz script to review our database setup and have found that the VLF count is high (13562!) on the primary DB since changing to Full recovery model. I ran a full ...
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When REBUILDing indexes on SQL Server, what bearing does tempdb & LOG disk speed have?

Say I have the a data disk that is 50x faster than the LOG and tempdb (measured by Random Write speed) disk. (Don't ask why that's something we'll be fixing if needed) I have a table that's got 19 ...
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1answer
121 views

Restoring a database back to a point in time before full backup was made

A problem with one of our database tables arose at the end of last week and I wanted to restore that database to a server in order to retrieve the table. We only have the last backup, and a full set ...
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SQL Server 2008 R2 Restore COPY_ONLY full backup with transaction logs

After doing some research I cannot seem to find an answer to this question. Background I am attempting to setup a backup plan that fits the following three requirements: Reliability of backups, ...
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1answer
360 views

SQL availability groups log maintenance

I have a AG with 2 nodes in a site in sync mode and 1 offsite in async mode. I'm having trouble understanding how the logspace is maintained in this scenario. For instance, I'm taking log backups ...
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Performing a Transaction Log Backup on a Live Database [duplicate]

I have a server 2012 database that has a transaction log that is growing at a rapid rate. i have a job that runs once a day after production hours which backs up the log file and shrinks it. The ...
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136 views

Online backups with VENDOR library: what should be set for ACTIVE LOG PATH?

My customer is using Veritas NetBackup so we use its library file in the LOGARCHMETH1 parameter for the VENDOR option. That is for archive logging path. What path should be set for ACTIVE LOG PATH ...
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SQL Server transaction log - shrinking and reattaching

I have the next scenario in SQL Server 2008: one big database (production DB). I want to backup this db then restore it on another server. Then I do some delete operation from some big tables. After ...
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340 views

Database not naturally shrinking log file [duplicate]

I have a database that is set to Simple recovery mode. There is 99% free space in the log file and I can manually truncate the log file right down to 500 MB. The next day, after a daily import ...
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122 views

Who changed the size of the transaction log?

Can I know, who and when changed size of database transation log?
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Why did my transaction log grow so much? [duplicate]

Possible Duplicate: Why Does the Transaction Log Keep Growing or Run Out of Space? About a month ago I migrated my SQL Server 2008 R2 database to a new schema. I ran scripts to migrate the ...
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SQL Server Transaction Logs in the Cloud

It is a common practice to place the transaction logs (*.ldf) on a separate physical disk system than database files (*.mdf, *.ndf). In a virtual machine cloud environment, is it okay to put the ...
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547 views

Restore to a point between two full SQL Server backups

I have two SQL Server database backups from Server1. Backup1 was made on, say, 2013-01-01 and Backup2 was made on 2013-01-03. What I want to do is restore Server2 to the intermediate state on ...
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How to disable ldf file or limit its size [duplicate]

Possible Duplicate: Why Does the Transaction Log Keep Growing or Run Out of Space? My .ldf file size keeps increasing. I already tried to shrink it but after that it just grows again. How ...
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SQL Server - how transactions and transaction log work (simplified)

I have a theory on how transactions work, but I would like if someone could verify it or correct some points if possible. Let's consider we have a database with full recovery model. Now, everything ...
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628 views

Point in time recovery from the same database - what does it mean?

I have two questions. I have a database in full recovery mode. Lets call transaction log an LDF file for short. SQL Server allows me to restore to point in time in the past when restoring from ...
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769 views

IBM DB2 9.7, possible to temporarily disable transaction logs?

I want to clean the whole database, so I am dropping all tables and DB objects in two FOR loops, within one transaction. This makes the transaction logs become full. I could increase the transaction ...
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SQL Server virtual log size

I'm somewhat of an accidental DBA, being a developer who inherited a couple of database servers (2005 and 2008) from someone who knew little about database administration, and seemingly had even less ...
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separating tlog and db file when using fusionio

We have a FusionIO card that we use in our production database. We have both the transaction log as well as the database files on that same drive. I know the recommendation is to place the tlog files ...
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3answers
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ASPState Log file growing tremendously - SQL Server 2008

Microsoft SQL Server 2008 (SP3) - 10.0.5500.0 (X64) Web Edition (64-bit) on Windows NT 6.1 (Build 7601: Service Pack 1) I have an ASPState database online, and its log file ASPState_log is growing ...
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Shrink a large log file for a “Throw Away” database

I have a copy of my prod database on a development server. I am using it to test a deployment script. But when I run it, it says that the log file is full. I checked and it is at 10 GB (Almost the ...
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SQL Server 2008 transaction log full

We have a large database, with a size of approx 400GB. We are using bulk insert (from upstream system) with the following parameters: `Driver=/IIS/Appl/Server/branded_odbc/lib/VMsqls24.so` ...
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SQL Server transaction log [duplicate]

Possible Duplicate: Why Does the Transaction Log Keep Growing or Run Out of Space? Is it possible to have SQL Server 2008 R2 reset the transaction log for certain databases when the ...
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Why does my transaction log use so much space?

I have a staging table with 20 million rows that uses about 8GB of storage. After populating foreign keys and sanitizing data I need to move this data into a production table (which does not need all ...
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646 views

In Sybase, what can I do to figure out why my Transaction Log is filling up?

We have a process that runs each morning to load about 40,000 rows from one server to another. In the past few weeks, the process has been having a 'log suspend' once or twice a week. This is ...
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Disabling logging on certain tables

I'm using SQL Server 2005. I have two tables that contain aggregate information. The information is constantly being updated, generating almost 5GB of log data a day. (That's larger than the entire ...
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Transaction Log file .ldf is too small

Current database is almost 200GB however the transaction log file is only 4.1GB. I am worried if this influences the performance of databse and how could it be solved. When I do this query DECLARE ...
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How do I tell what is filling up the transaction log?

We have a transaction log on a sql database and for some reason it has filled up to 50GB when our live system only has about 2GB. Is there any way I can profile sql or the transaction log to try and ...
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How are transactions logs inserted?

I have an ms-access database at work that has a table that's a transaction log. The table contains the following fields: Date - The date the transaction took place. Table_Name - Name of the ...
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Can We Perform an “Up-To-The-Minute Restore” After Taking Transaction Log Backups?

The Setup: Say we have a Database in Full Recovery Mode that does a nightly Database Backup, Transaction Log Backup, and Transaction Log Shrink. Now the Transaction Log grows so quickly during the ...
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SQL Server transaction log file refuses to grow

Problem: I have a SQL Server database sitting on a 1 TB drive. The log will not grow past 5 MB even when the MAXSIZE is set much larger than 5 MB. Error received: The transaction log for database ...
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View delete statements in the Transaction log

Is it possible to view delete statements that have recently occurred in the Transaction Log?
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Safely deleting a SQL Server log file (.LDF)

I can make sure my app is in a consistent state. I can rollback all the uncompleted transactions if any (just in case) it's ok I can DETACH the database What do I need the log file for after that? ...
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575 views

PostgreSQL WAL Archiving: Does having archive_mode set to 'on' without copying logs cause performance issues?

Using PostgreSQL 8.4/CentOS 6: if I set the archive_mode parameter to on in postgresql.conf, but don't actually store the generated WAL files anywhere via the archive_command parameter, is there any ...
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When are Archived Redo Logs generated?

We have an instance in Oracle 10g. Only one schema is used for a web application (Internet-facing), which is only user for reading information, no adding or modifying data. The rest of schemas are ...
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Is there a performance benefit to placing transaction log files on a separate drive?

There are many blog posts and best practice articles extolling the virtues of placing the SQL Server data file on one hard drive and the transaction log on another. The reason given is that that the ...
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Is it possible to recover day's worth of queries from sql server log file?

I lost all data entered and edited in my system yesterday, and my ISP has announced to me that last night's backup is corrupt and cannot be recovered. Is there any way to access the database's log ...
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Transaction Log Truncation with Copy Only

I have a database backup job set to use full backup with the Copy only option on once daily. The copy only is on because from what I have read that is the only way to backup a database that is ...