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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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?
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53 views

Shrinking a physical transaction log file on a mirrored database

I have 2 SQL Server 2008 Standard Edition instances that are mirrored. Both instances are running Service Pack 1. I run Full backups daily and transaction log backups every half hour (through ...
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1answer
390 views

Is it possible to restore SQL Server DB from transaction log (no MDF)?

We had a SQL Server 2005 server that housed roughly 200 low/no traffic archive databases, and that server was not backed up to any other device. The database files (MDF and LDF) were stored on a RAID ...
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1answer
77 views

SQL Server 2008 - SIMPLE database log file is HUGE relative to the actual DB?

So... I'm not a SQL Server DBA but was asked to look at a customer's situation where they have a 2GB database that has a 60GB transaction log. I've read up on a whole lot of articles on the web (Aaron ...
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144 views

SQL Server 2014 log file very large [duplicate]

I have a database with a memory optimized table and table partitions. The log file is over 300GB in one .ldf file, and another 40GB in another. I have tried shrinking the db, files, log DBCC ...
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24 views

Detail of all transactions on a specific row

I've a User table and It's data can be added/ updated from a User Screen. I want detail of all transactions on any row. For example, I have data in table like this Name - Age - Salary ...
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2answers
244 views

MSDB log file size

We have a SQL Server 2008 cluster with 60 databases. Full backup runs every night, log backup runs every 15 minutes. The MSDB database recovery model is set to simple (default). To be able to see ...
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28 views

How to shrink the .ldf(log) file of the particular live production database? [duplicate]

I would like to say that as one of my production database (.ldf) log file is growing larger than databse size. The size of database file (.mdf) and their log file (.ldf) is as follows:- 1)database ...
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1answer
205 views

Misaligned Log IO Issues and Unmatched LUN sector sizes in AlwaysOn

I'm running into a little bit of a snag on a high log send queue in a 2014 SP1 Asynchronous Mode AlwaysOn Environment with a secondary replica in Azure. For one of our higher transaction volume DB, ...
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1answer
78 views

Log shipping 2008 r2 SP2 server to a 2008 r2 SP3 CLUSTER

We have recently configured one database to be replicated with log shipping in production, using SQL Server 2008 R2. We have up and running more than 150 database replicas without any problems. But ...
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3answers
268 views

Backup database by copying the MDF and LDF files

I want to backup a SQL Server database by copying its files manually. Is copying the database.MDF and database.LDF files enough or should I also add more files? It might be not the proper way for ...
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1answer
36 views

Corruption in mariadb binlog

I have an installation with mariadb version 10.0.21. I need to backup the binlog file every 5 minutes to TSM, but as the binlog is being written every second, i am afraid of the file getting ...
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56 views

Influence of index rebuild tasks in tempdb on the transaction log?

I have read pretty much about index maintenance and all the pros/cons of reorg, rebuild, online, offline, TEMPDB and timing and right now I am kind of more confused than ever before... The goal is to ...
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1answer
170 views

How to automatically shrink a SQL Server transaction log only if it exceeds a certain limit (e.g. 20 GB)

Our database is set to FULL recovery mode and we take a database backup and a log backup every night. On several occasions we have noticed that the transaction log file is not truncated after the log ...
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1answer
25 views

Keeping all SQL Server logs

I can not find my SQL Server logs for all days in the past. In only found for last 4 days. Is it because that I restarted the server and logs are dumped if the hosting server is restarted? How can I ...
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1answer
61 views

Really big LOG backups on a DB with Image field

Normally, our log backups has < 10MB size In a big database with a lot of transactions per hour ). But now we have a database, that is storing Images on a Image field. the problem is, the ...
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1answer
28 views

Index Rebuilding Log File Growth

I would like to start running regular index maintenance on a server that has been running for a while without it. The database is running in FULL recover with log shipping. The problem I am having is ...
4
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1answer
72 views

Would SQL in a cluster failover when transaction log for database is full?

I have a Microsoft SQL Cluster with one instance. If one of the databases is full, would SQL in a cluster failover when transaction log for database is full? If it depends on the reason the ...
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2answers
101 views

Shrinking log files on development

I've been looking at getting some disk space back on some of our development machines. These are machines that are not being backed up, not being developed on directly, and not being maintained ...
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1answer
107 views

First log backup after FULL taking lots of space

In the backups I'm doing in my database, the first LOG backup I do after the FULL backup is taking too much space, even more than the full backup. For example: 4:50 AM: FULL BACKUP - .bak 7.2GB ...
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1answer
83 views

Log file shrink attempts are futile

I have got a question relating to SQL server log files in a production environment, however what I am trying to do is first run some testing on a smaller Test Database (E10Test) before I move on to ...
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2answers
90 views

How to estimate rate of Trans Log usage

We have a moderately sized database (about 500GB) that we're going to switch from Simple to Full Recovery, with Trans Log backups every 15 minutes. Before we make the switch, I want to get an estimate ...
2
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1answer
314 views

how to reinitialize log shipping?

Here is the situation: DB on Server A had the transaction log shipping configured and uses Server B as secondary. It has been working well for a long time. However, we recently detected that one of ...
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1answer
73 views

Change recovery mode and enforce a transaction log backup?

I am going to do a special data deletion operation - once and during a maintenance with no user access (Sql 2008 r2). The result is a large deletion of millions of blob data from a table by ...
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2answers
490 views

Switching to Simple Recovery - shrinking transaction logs

Standard disclaimer: I am an "involuntary DBA" (a nice phrase I saw in this article) and have done lots and lots and lots and lots and lots of reading on this subject, but am still ...
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91 views

Transactional Replication issue due to big Transaction Log in sql server 2008 r2

I want an answer of question and that would be highly appreciated Scenario: First of all i am an IT guy from Sports Field and using SQL Server 2008R2. I have 2 production servers server 1 and Server ...
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1answer
96 views

Backing up to Nul on an SQL Mirror

I've seen and read a lot of questions about the transaction log and I know that backing it up to nul is usually frowned upon, however my understanding is that this is from a data recovery perspective. ...
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1answer
71 views

Online clustered index rebuild using more log space than expected

I have a table TableA ID PK BIGINT TrxID BIGINT CardBalance INT AccountBalance INT SP_SPACEUSED 'TableA' output: name rows reserved data index_size unused TableA 904054184 ...
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183 views

Poor cardinality estimate disqualifies INSERT from minimal logging?

Why is the second INSERT statement ~5x slower than the first? From the amount of log data generated, I think that the second is not qualifying for minimal logging. However, the documentation in the ...
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1answer
108 views

How is my database being backed up?

I'm using SQL Server 2008 R2. Someone else set everything up. I encountered an error today: Autogrow of file 'ASPState_log' in database 'ASPState' was cancelled by user or timed out after 1748 ...
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98 views

Log file Zeroing

During the creation of the database, I am getting below mentioned information about log file zeroing and I have highlighted my understanding in bold fonts. 2015-08-23 12:42:36.850 spid51 ...
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1answer
104 views

Availability Group log_reuse_wait = Replication

We have a SQL 2014 Availability Group with 3 replicas of our primary database - 2 in our main data center and 1 in our DR center. We did a large index rebuild on the primary which obviously needs to ...
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3answers
477 views

shrink database in always on availability

hi i was using this query for shrinking the database log file USE Tfs_CoE; GO ALTER DATABASE Tfs_CoE SET RECOVERY SIMPLE; GO DBCC SHRINKFILE (Tfs_CoE_Log, 1); GO ALTER DATABASE Tfs_CoE SET RECOVERY ...
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65 views

How to free up disk space on a drive which has BiztalkMsgBoxDB_log file in it

I have been asked to analyze a issue regarding one of the biztalk servers. I was asked to free up space on a particular drive, where I found the only file BiztalkMsgBoxDB_log.bak is taking up close ...
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1answer
604 views

Can't restore SQL Server db from full backup, log processing fails, database in 'restoring' state

I am trying to set up a database for development purposes on my PC's local SQL Server Developer Edition 12.0.2000.8. I've got a full database backup and separate transaction-log-only backup files ...
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2answers
35 views

Random and constant “Log Growths” Alerting, how to make it stop?

I've set up alerting on all my database servers and every once in awhile I'll get the following error, sometimes it goes on and on and on, other times it'll be a few times here and there. The SQL ...
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2answers
337 views

SQL Server log file used pecentage does not drop after multiple backups

SQL Server 2005 I ran "dbcc SQLPerf(logspace)", then took two log backups, and ran "dbcc SQLPerf(logspace)" again. No change from 48.55% used, even though "dbcc opentran (foo)" says that there are no ...
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1answer
81 views

Size of individual transactions in log file

is there a way to find out the size of transactions from the transaction log by looking at the log file in SQL Server 2008? I do have an unexpected bloat of my logfile from some maintenance jobs which ...
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2answers
308 views

How are these two SQL Server rollbacks different?

In SQL Server 2008 R2, how are these two rollbacks different: Run an ALTER statement, for a few minutes, and then hit 'Cancel Executing'. It takes a few minutes to rollback completely. Run the same ...
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1answer
42 views

Mysql: How does a rollback operation be performed inside InnoDB

I would like to hear in simple words Please answer me in simple words to the question on the below scenario. ============== Engine: Innodb Trx1 : started and a DML is executed at 10:00 AM and rolled ...
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1answer
18 views

Optimal time interval for scheduling of Transaction Log Backup

I have a database which is currently of size 50 MB. The database is bound to grow by 10 to 15 MB per hour and the data is important. So, I wanted to ask what should be the optimal time interval in ...
2
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2answers
168 views

Disk size and log file growth during upgrades

I have four SQL Server databases. Per the maximum load requirements, each database file can be between 1 and 2 TB in size. The HDD is a multi-disk DAS with about 9TB of space. During a database ...
2
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3answers
4k views

How can I reduce the Initial Size of a LOG file?

I've inherited a SQL Server 2008r2 database; the Data file was created with an initial size of 1,000 mb, but the Transaction Log has an initial size of 28,016 mb. No backups were being performed. ...
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1answer
316 views

How to get the daily amount of committed transactions on a given MSSQL database?

The number of transactions for the current connection can be obtained with @@TRANCOUNT. How can you get a daily counter of the globally committed transactions on a given database?
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3answers
2k views

Restore a large number of transaction logs

I'm using SQL Server 2008 R2, and I need to restore 36 .trn logs to a database. I have restored the first 4 using the restore transaction log functionality in SSMS (right-click database > tasks > ...
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1answer
61 views

Safe delete Transaction Log in SQL Mirroring scenario

We are using SQL Server Mirroring with a witness (High Safety mode) and we see the transaction log on the Principal Server has grown around 20 GB in few weeks. I looked around on SO and google for ...
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265 views

Could not redo log record on mirror

One of my database mirrors is in the suspended state today and the error log on the mirror shows the following. Could not redo log record (338934:102862:477), for transaction ID (0:848150408), ...
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17 views

Options for reducing transaction log size when disk space is restricted [duplicate]

I have a very unfortunate situation in which I have some SQL Server (standard edition) databases living on a small (~120gb) disk, and a transaction log which has grown to 50gb+. Unfortunately, the ...
3
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1answer
553 views

Unable to shrink log file due to snapshot replication

Our database log (SQL Server 2008 R2) is growing too big, and truncating it via DBCC SHRINKFILE doesn't work (the database is set to simple recovery mode). A bit of background. I released some ...
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1answer
49 views

What transaction logs are for

I'm confused about tranasaction logs for SQL Server. I was under the impression they can be used to roll the database forward. For example say I made a software release on Sunday, I added three new ...