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Questions tagged [database-administration]

293 questions
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Why is my database not available?

I have one database on my server that constantly becomes unavailable. To fix, I take it offline, then back online. Looking at the event viewer there are three errors in quick succession: FCB::Open failed: Could not open file C:...\MyDatabase.mdf…
Michael Itzoe
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3 answers

Access to SQL Server when administrator account deleted

An interesting situation here. We have a database server, used for testing only, where someone went in and deleted the administrator login. Since this is a test server the was no other admin level login on the server. Is there a way to get access to…
Shiraz Bhaiji
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What are some reasons why a MySQL index would be 12X the size of the table?

So we have a table that has two indexes one on the primary key and one other index on another column on the table. The index size is currently 12X larger than the table itself. What are some reasons why this would happen? We've optimized the table…
Jon
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Why is SQL Server automatically creating an explicit user mapping for my local Administrator account in every new database I create?

If I login to a particular instance of SQL Server 2008 using a Windows domain user who is in the sysadmin role and I create a brand new database via SQL Management Studio, a user in the newly create database is automatically mapped explicitly for my…
Rob Sobers
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2 answers

Restarting a database in a database instance without restarting entire database instance

I have a database server running several instances of database. I am having issues while accessing a particular database and want to restart the same but without restarting the entire db server as it will effect other databases in the instance or…
Viky
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10 Million records = wiped MySQL DB?

So I was trying to load some test data and it appears to have killed my entire database. This is one case where it's great to have backups! They were all plain insert queries, probably about a 900 MB file. What could have gone wrong? When I woke up…
Josh K
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10 answers

Things every DBA for DB2 on Unix, Linux should know

What are the most useful resources for a DB2 DBA working on Unix or Linux? Books Web sites Tools etc.
Kevin Beck
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Postgresql: missing data after crash

I've just rebooted my server after a crash/reboot (which I haven't determined the cause of yet). Server: centos, Postgresql: 9.2.8 It looks like all my postgresql databases were reverted to the state they were in 3 months ago. Columns that I added…
EoghanM
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Confused about horizontal scalling

Please correct me if I am wrong but I guess handling more requests and load by adding more machines or balancing the load between multiple servers is horizontal scalling. So, if I add more servers, how do I distribute the database? Do I create one…
Benjamin Smith Max
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6 answers

mySQL DBA Software

Are the free mySQL GUI tools adequate for administering a mySQL db running 'vendor' supplied applications? Are there other tools you would recommend that make your life easier?
Sam
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SQL Azure Automated Backups doesn't work

I configured automated export of my SQL azure db, but backups are not created. Also, I'am resieved this mail. Automated SQL Export failed for [servername]:[dbname] at 25.09.2013 23:06:45. The temporary database copy was made, but this copy could …
IGusev
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What tool generated this report of MySQL server performance?

I found this report on the performance of a MySQL server. I would like to be able to generate this report for my own server, but I don't know what tool they used. Does anybody recognise this report? What tool generates it? How can I get that tool…
Jim DeLaHunt
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How do you clone an oracle instance?

How do you clone an oracle instance? Basically, I want to end up copying it from d:\oracle\oldname to d:\oracle\newname. I'm working with Oracle 10.2.
BIBD
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Using mongodump with an auth enabled mongodb server

I'm trying to do a daily backup of my mongodb server (auth enabled) using the mongodump tool. mongodump provides two parameters to set the credentials: -u [ --username ] arg username -p [ --password ] arg password Unfortunately they don't…
bb-generation
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Optimising PHPMyAdmin configuration for massive databases and many tables

Developers require database access to a significant number of databases, each with 220+ tables, and currently they are provided this using phpMyAdmin 2.11.9.5. Initial load is very slow, puts some load on the database cluster beneath, and runs lots…
Andy
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