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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Restore Verify Only w/ Transaction Log Backups

Question When RESTORE VERIFY ONLY on a transaction log backup fails, what do you do? Background After FULL and DIFFERENTIAL backups, I run RESTORE VERIFY ONLY on the backup file(s). This rarely ever ...
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63 views

Open Transaction that won't go away SPID Ns

There is a transaction that has been open on this instance since it was restarted and is preventing us from clearing the ldf. Here is the transaction information: Transaction information for ...
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39 views

Switching from SIMPLE to FULL recovery mode implications

I have several databases that I'd like to move over to FULL recovery mode so we can have point-in-time restore capability. We don't need it on all of our databases, just the ones that are transaction ...
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44 views

Statistical probability of an incomplete transaction committed by Postgres

tldr After spending time with bad databases which I will not mention, I came to question even the point of a database. I knew that they could serve a purpose to keep permanent data organized, but ...
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107 views

Log File Management - Space on Disk

At our organisation we have several non-Production environments where Developers run free and wild with TSQL code and databases. The DBA team do not normally monitor or maintain them. Recently several ...
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42 views

Dealing with large transaction logs in a cluster

Disclaimer: I'm a dev, not a DBA. I've gleaned what I can from MSDN, but could do with some expert guidance! I'm working with a SharePoint 2013 installation on a SQL Server 2012 cluster of two DB ...
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Virtual Log Files (VLFs) Fragmentation

I have a database with 160 VLFs. How do I determine whether the VLFs are fragmented? Further, how do I find the percentage of fragmentation? Another thing that I want to confirm: Are the following ...
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how can i find exact value in a transaction log tables?

In my database after executing a stored procedure,timeout error or some errors occurs while execution.that error also is registered in transaction log table? If yes is there any query to find tat ...
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24 views

Lock rows for long running transactions

I have a question table from which agents try to answer 5 questions at a time. Obviously, I want to avoid agent collision i.e. if an agent is answering a question, other agents can not work on it. Is ...
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22 views

Reducing log files? [duplicate]

I have a database that has a log file of nearly 80 GB. Database size 180 GB. The recovery is set to Full. What is the correct way to shrink the log file without using the shrink option in SSMS as ...
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59 views

Non- Logged operation [closed]

I want to run a non-logged operation with changing the recovery model of a SQL Server database. Is their any way to do this?
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68 views

Transaction Log Shipping doesn't use the latest transaction log

I have setup transaction log shipping between two servers every 15 minutes, this is on SQL Server 2008 R2. The problem is that when the logs are being restored on the secondary server, it always uses ...
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100 views

How to do a one-time log shrink on a database with transactional replication

I have inherited a 10 GB database with an 80 GB log [only 3% in use according to DBCC SQLPERF(logspace)]. It seems safe to assume the extreme log growth was due to problems from long before I was ...
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94 views

SQL Server - Data and Log Separation

We have a SQL Server 2008 R2 which has, among others, a 12K RPM HDD and a 7.2K RPM HDD. The original intention was to store the data files on the 12K drive and the log files on the 7.2K drive, as is ...
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1answer
94 views

Why write ahead logs in PostgreSQL are generated every second

PostgreSQL version 9.2 generates write ahead log (WAL) every second i.e. 60 WALs are generated in one minute. Is it possible to make them occur less frequently? Is it possible to increase the WAL ...
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205 views

Only do log backup if necessary in SQL Server

We have transaction log backups taken every few minutes from many databases. Is there a way to determine if there were any committed transactions since the last backup and only then do a log backup? ...
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308 views

Multiple Transaction Log files and performance impact

So I've gotten into an argument with several people regarding the number of transaction log files a give databases should have. I've seen several post saying you should only have 1 transaction log ...
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67 views

Database never maintained

Just moved from wrong forum i paste here my question: I just got a new client recently migrated from SQL Server 2000 to SQL Server 2005 due to vendor application limitation to new releases. Vendor ...
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179 views

Delete log to increase DB space?

I'm running SQL Server 2008 Express and hitting the 4GB size wall. I'd like to make some space to give me time before i migrate to a larger DB. I don't need my transaction log. So, can i delete ...
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85 views

Storing Tlogs and data files on the same drive

I'm looking for some clarification of various things I've read. I understand it to be best practice to store your transaction logs on a separate drive (spindle) than where you MDFs and NDFs are ...
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59 views

Mysqldump --flush-logs results in small backup files?

New to MySQL and just learning how to setup a daily full backup (binary logs enabled). My goal is to run a daily full backup of the databases/schemas and reset the binary log. I'm currently using an ...
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381 views

What are the most effective techniques to reduce SQL Server disk space use when updating all rows in a very large table?

Given a SQL Server table with a large number of rows no columns with large-value data types multiple indexes more allocated space than available for the largest possible transaction log size a ...
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592 views

Encountered unexpected growth Transaction log file size

We are using SQL Server 2008 R2 Standard version, we created Maintenance plan Rebuild Index, Reorganized Index and update Statistic , Scheduled Every day at 1 AM. After Executing this Maintenance ...
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35 views

Transaction Log Backups on SQL Server

Running SQL2008 R2 SP2, database is in FULL Mode Is it Possible to shrink the transaction log without putting it into SIMPLE mode? Temporarily cannot take log backus and don't want it to grow until I ...
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227 views

How to pinpoint root cause of excessive log file growth

The log file stays pretty small (~500MB) until about 11PM, and at that point it begins growing until no disk space is available. The log file reached it's maximum size at 12:39AM, so the growth took ...
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105 views

DB2 - Archive mode - large number of logs in logarchmeth1 folder

maybe for someone this is begginner's questions. I read lot of documentation and set: `LOGPRIMARY 6 LOGSECOND 4 LOGFILSIZ 4096 logarchmeth1 Disk - C:\archive logpath C:\active` Number of logs ...
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112 views

SQL SERVER Virtual Log Files

I am new to SQL SERVER, could anyone please explain that why do we have VLFs' in T-LOG and why not have 1 T-log itself. I am aware that VLFs' are logical but my question is why VLFs'? what is the ...
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TEMPDB Log Files [duplicate]

Do I want to store the tempdb log files on the same drive as my user database log files, the same drive as the tempdb data file, or on a separate drive?
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57 views

Audit SQL Server database transactions

I found some column values have been changed on a table, I need to view when and who made these changes. I tried to read the transaction log backup file, but I didn't understand it and cannot find ...
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66 views

Log File over 400gigs…need to bring this database back to life

I'm not a dba so I don't understand the admin side of SQL Server too much. One of our sharepoint instances blew up and our IT staff asked if I could assist bring it back to life. I found backups for ...
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147 views

Why do I need Transaction logs at all [closed]

We use Microsoft SQL Server as a repository of images and data about those images. We record in real time and never care about recovery. If the database slows down and can't handle the number of ...
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76 views

Copying a restoring database in SQL Server 2012

I've got two SQL Servers, one of these servers (Server A) is backing up transaction logs on some database and uploading them to the other (Server B). Unfortunately I have no access to Server A, I ...
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228 views

Missing Transaction log in chain, Possible to skip

We have had one of our clients SQL Servers crash and need to restore it to the most recent possible time. We have a full backup from Monday and transaction logs that run every hour up until this ...
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43 views

Implement Log Shipping in prod env

We have a 3.5 TB DB which is already involved in log shipping to two different servers, as one will be in restore sate only and one will be in stand by mode which helps for reporting needs. All three ...
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589 views

Optimising a query against sys.fn_dblog

Looking for assistance improving a query. This query is used to review the last N transactions in the LDF file and then add some useful information like the user, start time, query text, etc.. Here ...
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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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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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289 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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3k 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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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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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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63 views

How many days old log is stored in .mysql_history

I would like to know how many days old log is stored in .mysql_history in mysql server and also i want to know is it possible to find the date or time when the particular command or query is executed ...
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607 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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414 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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95 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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194 views

Cannot shrink transaction log

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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247 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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103 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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305 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 ...