The age of the files - If your log folder has several dumps from two years ago, then no dumps for several months, then a few recent dumps, you can safely delete the two year old dumps. Duplicate dumps - When dumps occur there are three files created.txt.log &.mdmp. Open the.txt file for several of the dumps. The command created a database mydb, select the database, and execute other SQL statements.In addition, it showed all the possible warnings and errors. It is recommended that you use the SOURCE command to restore a dump file because the SOURCE command returns very detailed information including warnings and errors. You can delete it without corrupting the DB. However, you should try to find who created the dump and why (likely a partial or full backup, though a strange way to do so), and ascertain if it is still needed. Remove Secondary Transaction Log File. Right-click on the database and click Properties. Go the “Files” tab on the left side and select the log file that you want to delete from the “database files” secion and click on the remove button at the bottom right. Yes, you can just delete the Dump Files, you may need to provide permission You will find the dump files in C: Windows and in C: Windows MiniDump However, the most successful way to remove all dump files is: Open File Explorer Click on your hard drive On the Manage Tab, click Cleanup Let Disk Cleanup do its initial scan.
ObjectiveAlarmODBC service continues logging alarms and events into SQL database. The size of database file (.mdf) and its transaction log file (.ldf) will grow over time. How to periodically purge old records from the database and dump the transaction log so that the database file and its transaction log file keep compact?
Procedure
A SQL Server Agent job can be created to delete old records in the database, then shrink the transaction log file (.ldf) and database file (.mdf). This SQL Server Agent job can be scheduled to run every day. Refer to the following steps:
- Make sure SQL Server Agent service is running. Launch SQL Server Management Studio, create a new job under 'SQL Server Agent --> Jobs'.
- Set the name of job to something like 'PurgeFixAlarms'. Assume the name of SQL database used by AlarmODBC service is 'iFix'. On 'Steps' tab, create the first Step like the following. The code below deletes those records that were created 90 days ago.
- Create the second step in this job like the following. Note, the following code assumes the SQL database name is 'iFix' and its transaction log file is 'iFix_log.ldf'.
- Create the third step in this job:
- On 'Schedules' tab for this job, create a new schedule for this job and configure the schedule to occur at a specific time every day, say 12:00:00 AM every day.
By: Sergey Gigoyan | Updated: 2015-11-18 | Comments (8) | Related: More >Database Administration
Delete Sql Dump Files Google Drive
Problem
SQL Server allows to use more than one transaction log file, but the question arises whether it is necessaryand what is the benefit of having multiple transaction log files. There is a misconception among some developers that having multipletransaction log files can increase performance because SQL Server can use them in parallel. SQL Server usesonly one transaction log file at the moment and there is no parallelism in this case. Sometimes more than one log file can beneeded for the purpose of troubleshooting. So, normally there is no necessity to have more than one log file.Let’s consider a case, when our database has more than one log file and we should retain only one.This tip aims to describe how to remove unnecessary log files correctly and retain only one.
Solution
Before starting to illustrate how to remove unnecessary log files, let's briefly describe how SQL Server workswith log files: when database has more than one log file, SQL Server keeps writing to the first one until it's full,then switches to the second and so on. After the last log file becomes full SQL Server returns back to the first one and the cycle continues.However, as we mentioned, sometimes more than one log file may be required. For example when the disk, where the log file is locatedbecomes full and we need to create the second log file in another location, but after troubleshooting the problem,we should delete the second log file, because there is no use to have more than one log file.Now, let's assume that we have a database with two log files, and our task is to remove the second one.The following script creates the TestDB database with two log files and TestTable table. To run it by yourself, you will need to replace“D:SQL Data” with an existing folder path.
Now let's understand the transaction log physical structure: Internally transaction log file consist ofVirtual Log Files (VLF), which are the unit of management in the transaction log file. It means that when database engine grows or shrinksthe log file, it does that with complete VLFs (for example it can't shrink half ofthe VLF). The size of virtual log files as well astheir number in the physical log file isn't fixed and is managed dynamically bythe database engine. To monitorthe transaction log file internallywe use 'DBCC LOGINFO' command, which provides information about virtual log files. In the script below we used this command for our database:
And the result is the following:
FileID is log file IDs for our database. Status indicates is VLF reusable ornot (possible values: 0 - yes, 2 -no). As we can see there is only one VLF withStatus=2. Now when we will insert data into the TestTable and monitor how log files are growing:
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With this example we can see that both log files grew and now there are VLFs with 'Status=2' in the second log file (FileID=3) also:
Now we need to remove TestDB_log2.ldf file. Note, that we can remove only the secondary log files. Removingthe primary log file is not allowed by SQL Server.Each database has only one primary log file and the first log file which is created inthe database creation script is considered the primary.If we try to remove the second log file:
We will receive the following message:
We can remove the transaction log file only when it's empty, therefore wefirst need to empty it.To do that, we should back up the transaction log. Since our 'TestDB' database isnewly created and there are no full backups, we needto issue a full database backup for the TestDB database, after which we canissue a transaction log backup:
Should You Delete Dump Files
The transaction log backup truncates the log file (there are some exceptions, which are out of scope of thistip). Log truncation deletes inactive virtual log files fromthe start of the logical log and releases space in the log file. However, truncation does not reduce the size of a physical log file. It only frees space in it,which can be reused. Let’s run 'DBCC LOGINFO' again:
![Win Win](/uploads/1/1/7/8/117802801/173431363.jpg)
As we can see there are no virtual log files in the 'TestDB_log2.ldf' file with Status=2 and now our log file is empty and ready for removal:
The removal is successful.
However when we check log the information again, we will see that the logical log file still exists:
If we do another log backup, the file will be deleted:
Next Steps
- Keep this tip in mind to determine transaction log usage and how to remove anunneeded log file.
- Check out these resources:
Delete Sql Dump Files
Last Updated: 2015-11-18About the author
Sergey Gigoyan is a database professional with more than 10 years of experience, with a focus on database design, development, performance tuning, optimization, high availability, BI and DW design.
View all my tips
View all my tips