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

learn more… | top users | synonyms

2
votes
1answer
3k views

Disable SQL Server Log Shipping to nonexistent destination

I am administering a SQL Server 2008 instance in a dev environment. At some point before I became an administrator, someone enabled log shipping from one of the databases on this dev instance to ...
1
vote
2answers
643 views

Fixing an error 9004 without taking the database offline

My database (SQL Server 2008 r2) is running fine but I’m getting the following error in my event log. Error: 9004, Severity: 23, State: 6. An error occurred while processing the log for database ...
3
votes
1answer
1k views

What is the differnent between transaction log and redo log in MySQL

I have read about MySQL. In my opinion, I see two log type is very similar. MySQL save how and when data is changed in log. Information is used for recovery of MySQL. I am confusing the function of ...
7
votes
2answers
1k views

SQL Server - contents of transaction log file in more detail

I have a question regarding transaction log (let’s just call it LDF for short) contents. I am assuming a database with full recovery model. I have read that LDF file contains (logs) each and every ...
83
votes
3answers
74k views

Why Does the Transaction Log Keep Growing or Run Out of Space?

This one seems to be a common question in most forums and all over the web, it is asked here in many formats that typically sound like this: In SQL Server - What are some reasons the ...
4
votes
1answer
363 views

Differential/T-Log LSN question

So, this is now my third question on this topic. I just keep finding more and more than i want to know and understand about how FULL recovery works. We transitioned a database to FULL yesterday by ...
0
votes
2answers
135 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 ...
3
votes
3answers
144 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 ...
2
votes
2answers
134 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 ...
5
votes
1answer
1k 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 ...
1
vote
1answer
75 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 ...
5
votes
3answers
620 views

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 ...
1
vote
1answer
227 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 ...
0
votes
0answers
26 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 ...
6
votes
2answers
5k views

MS SQL Server - Checkpoint process stuck in SLEEP_BPOOL_FLUSH

We seem to have a problem that came out of nowhere. The checkpoint process is stuck in SLEEP_BPOOL_FLUSH state, and not actually reducing the usage in the log file. This never seemed to happen ...
0
votes
0answers
24 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 ...
7
votes
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 ...
-2
votes
1answer
127 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?
1
vote
2answers
1k 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 ...
1
vote
1answer
372 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 ...
2
votes
1answer
105 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 ...
2
votes
1answer
232 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 ...
9
votes
2answers
1k views

SQL Server 'Create Database' statement. How to inherit autogrowth settings?

I am using SQL Server 2008 R2 and creating databases through continuous deployment. In our system, the default 1Mb/10% autogrowth settings in SQL Server work badly with our data. Particularly as we ...
5
votes
4answers
262 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? ...
3
votes
3answers
2k 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 ...
1
vote
1answer
77 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 ...
1
vote
1answer
209 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 ...
3
votes
1answer
95 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 ...
2
votes
3answers
3k 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 ...
2
votes
1answer
47 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 ...
3
votes
1answer
549 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 ...
4
votes
5answers
3k views

Managing Transaction Log Size using a Maintenance Plan [duplicate]

Are there any best practices for configuring a Maintenance Plan in SQL Server 2008? Currently, I'm removing database backups and transaction logs greater than 40 hours old, then backing them up. ...
0
votes
1answer
391 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 ...
1
vote
1answer
355 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 ...
7
votes
1answer
118 views

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?
2
votes
1answer
76 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 ...
3
votes
1answer
59 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 ...
-2
votes
1answer
198 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 ...
0
votes
2answers
106 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 ...
10
votes
1answer
2k views

DBCC CHECKDB firing every 20 - 60 seconds

I have a dev environment that is rapidly approaching deployment into production and have noticed in the logs that roughly every 20 seconds I see the message: Starting up database 'dbname' CHECKDB for ...
3
votes
2answers
836 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 ...
1
vote
0answers
434 views

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 ...
3
votes
0answers
205 views

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 ...
2
votes
2answers
95 views

Searching transaction logs for changes

I currently have a database with an attached CMS. The CMS has about 50+ people with various permission levels that can log in etc... I would like to know if there is a way I can look at the ...
2
votes
2answers
8k views

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 ...
1
vote
1answer
575 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 ...
1
vote
1answer
182 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 ...
36
votes
5answers
17k views

Why does ALTER COLUMN to NOT NULL cause massive log file growth?

I have a table with 64m rows taking 4.3 GB on disk for its data. Each row is about 30 bytes of integer columns, plus a variable NVARCHAR(255) column for text. I added a a NULLABLE column with ...
5
votes
4answers
14k views

Manually set log file size after shrink SQL Server 2008 R2

Am becoming a somewhat involuntary DBA at work at teh moment and really need some help on something. We have a 40GB database in Full Recovery Mode, no log backup configured and a huge log file of ...
0
votes
2answers
90 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