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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Log shipping on secondary server

Log shipping fails with the below error. Sql agent on secondary server has access to the folder and files in security. It is not a firewall issue. I created the jobs using the LS scripts as it fails ...
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221 views

SQL Server log file continues to grow? [duplicate]

I'm having an issue with a SQL Server log file which will not maintain a steady amount of space held on a HDD which it has been issued. The drive is ~50GB and the log file is growing to occupy this ...
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ORA-00338: log # of thread # is more recent than control file

We are facing the following error on our production database: ORA-00338: log # of thread # is more recent than control file The database crashed and there was no recovery action. What could I ...
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Why are we suddenly getting time-outs on multiple transactions? [closed]

Two days ago the transaction log filled up and my user's couldn't update or insert. One of my techs truncated the log, shrank the db, then did a full backup. The next day (Monday) we noticed that ...
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How to Fix log_reuse_wait_desc=LOG_BACKUP? LOG Backup not possible

I checked sys.databases to find out which databases need LOG backups. It surprised me that I had quite a few where log_reuse_wait_desc=LOG_BACKUP meaning, the JOB I have set up to run LOG backups on ...
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1answer
846 views

Securely deleting data from SQL Server logs

Is there a good way to purge data from a particular DB's *.LDF? A little background... I'm a SysAd, not a DBA. I'm running SQL Server 2008 R2 for one of my applications and I'm not particularly ...
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1answer
16k views

DB2: The transaction log for the database is full, But there is no 'First active log file'

First, I wish to say that I have very little experience with DB2. However, I've been tasked with tracking down the problem and solution to this problem. This is a DB2 database, and our testers are ...
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2answers
98 views

Rebuilding index

I have a transaction database and one of nightly job is to rebuild indexes that followed by a log backup and then shrink the log. Is this safe to do so ? Thanks Antony
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312 views

Transaction(s) still alive: How do I find the cause?

I can tell that something is hogging the transaction log on the DB2 for one of our Websphere Commerce installations. Basically I have a burst of transaction log files that are timestamped 5 days ago. ...
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1answer
3k views

DBCC loginfo contains thousands of VLF entries with status 2

I've inherited this huge SQL Server 2000 prod database and suddenly the transaction log ran out of space. The transaction log gets backed up every hour but I think over the weekend some existing jobs ...
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1answer
2k views

How to flush SQL Server database from RAM to hard disk?

As part of the nightly maintenance plan, my working MS SQL Server 2012 databases are backup-ed with options of simple recovery and full backup. Transaction log is not backup-ed. Also, at nights the ...
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1answer
292 views

Is it possible to change the drive that Microsoft DPM backs up to?

A while ago our sysops guys created a 15 minute transaction log backup schedule using Microsoft DPM. We often have an issue where there won't be enough space on the Log drive to perform a backup ...
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1answer
647 views

Cannot shrink transaction log [duplicate]

Bit of a headscratcher here. I have a db that has less than 1GB of data, but a 40GB log file. Transaction logs are backed up daily, and there is not a lot of activity on this database; approximately ...
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2answers
708 views

Is an AWS SQL Server RDS “log capture” the same as a transaction log backup?

When an SQL Server RDS instance provided by Amazon is configured for a recovery model using Full transaction logging, will the transaction log be trimmed by the "transaction log capture" that Amazon ...
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1answer
472 views

CHECKPOINT prevents database drop

I'm working in the following scenario: I'm creating an script that recreates an entire database. The script involves destruction an recreation of the database and all its objects, as well as a great ...
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2answers
682 views

Two Different Sources Taking Transaction Log Backups

I have inherited a database server with SQL Server 2005. The databases have full recovery mode with hourly transaction log backups. There are two sources taking full backups overnight and hourly ...
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1answer
193 views

Transaction log autogrowth duration

I am using event notifications to capture data and log file autogrowth events for all databases on my servers. I'm using the data to for analysis of database storage configuration. In looking at the ...
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2answers
254 views

Large number of VLF and shrinking the log

If there are lot number of VLF then it will effect the performance of the queries. I saw that solution is to shrink the log file. But shrinking the file is also bad. So how to take control of whole ...
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2answers
2k views

SQL Server transaction log backups: test whether tail log follows last known log backup

We are using SQL Server with full recovery mode. Given a full backup and a series of log backups, we would like to be able to check whether the log chain is complete from the last full backup to the ...
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2answers
2k views

Shrinking a SQL Server Log File Multiple Times

Recently ran into a situation where after a log backup and shrinkfile, the LDF file remained the same size. DBCC LOGINFO clearly showed only one active VLF and SSMS said that 99% of the space in the ...
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1answer
1k views

How to troubleshoot db/app latency during transaction log backup

I have an application that uses a SQL server (2008 R2) database and we are periodically having performance problems with the application and it coincides with our 15-minute transaction log backups. ...
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1answer
261 views

My log file is large, what should I do? [duplicate]

My transaction log is larger than I'd like it to be, and I want to know how I can fix that.
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1answer
2k views

How important are transaction log VLFs for performance?

How important are VLFs when considering database performance? What would describe an optimal situation for VLFs?
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3answers
4k views

Transaction log has grown huge after maintenance plan to rebuild idex

A couple of days ago I was testing some stuff using the Maintenance Plans in SQL Server 2008. I created one to rebuild indexes and take a full backup every week. (I know, bad thing I've found out ...
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2answers
2k views

Running out of Transaction Log space during Alter Table

I'm running an alter table, alter column on a table with nearly 30 million rows and SQL Azure fails after approximately 18 minutes saying that The session has been terminated because of excessive ...
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1answer
586 views

Sneaky rollback in SQL Server 2008 R2

Is it possible for an entire set of committed transactions to be rolled back in SQL Server 2008 R2 without any notification or logging anywhere? We had a set of data apparently get rolled back this ...
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4answers
12k views

Difference between Full backup and Copy-only full backup

I saw in this link that full backup does not truncate the log. So what is the difference between full backup and copy-only full backup? For the log backup there is copy-only backup which prevent the ...
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1answer
648 views

Restore to last transaction log restore

We have a log shipping setup where we replicate from our primary database to a secondary. Now that database is, by the way of log shipping, in standby and thus read-only. We set it up so we could ...
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3answers
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Transaction Log maintenance when switching to Simple Recovery

Background: I recently inherited 50+ SQL Servers with 450+ databases. The nightly backups are roughly 8TB and, needless to say, we're using more disk space than we'd like. All of the databases are ...
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207 views

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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2answers
638 views

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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21 views

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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2answers
1k views

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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1answer
957 views

Msg 5145: Autogrow of database log file took 1010871 milliseconds

In the past, I had an update query that ran for 7 days. I couldn't find a solution, so I created a new database with indexes. The update query has now been running for 26 hours. I am seeing messages ...
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328 views

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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2k views

Missing or lost transaction and no errors to show what went wrong

I have 2 missing records in SQL Server and I am trying to identify the problem that caused this issue. New records are inserted using a stored procedure, which will return an error code to the ...
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3answers
2k views

SQL Server 2012 Simple Recovery Model with LOG_BACKUP log_reuse_wait_desc

While I'm doing my own investigation, does anyone know why a database in SIMPLE recovery model has a LOG_BACKUP for the log_reuse_wait_desc? SQL Server 2012 SP1. No replication, no mirroring, no log ...
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3answers
7k views

Simple model database transaction log full 'CHECKPOINT'

I have a SQL Server 2012 SP1 database which has a problem that the transaction log is full. It consists of a single data file and a single log file, both about 800MB. I had 5GB free disk space, and ...
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1answer
977 views

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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1answer
118 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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39k views

Shrinking the log file does not reduce size

I have a database which had mdf size of 350 MB and ldf size 4.9 GB When i try to shrink the log file it's not shrinking. I know shrinking a database is not good and it should not be done. But still i ...
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1answer
879 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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1answer
7k views

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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1answer
3k views

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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2answers
666 views

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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2answers
2k views

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 ...
5
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1answer
345 views

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
161 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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2answers
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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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420 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 ...