The discipline of Operational and Architectural Management of Database Systems.

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2answers
1k views

Optimize a MySQL Database using MySQL Workbench

I actually have a few issues. First, I found this information about optimizing: MySQL OPTIMIZE all tables? The problem is, I don't seem to have a mysqlcheck program anywhere. I'm using MySQL ...
0
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1answer
242 views

How to make up sqlplus login automatically execute a script for Oracle in Linux? [closed]

Some script is invoked automatically want up sqlplus login, don't know what good method.
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4answers
102 views

T-SQL: Complete Database in one table

at a relational data model every logical relation is a single table with values and so on. I know someone who is this too much work and he wants to create only one table which contains all. This could ...
3
votes
2answers
542 views

What's the point in SQL Server Central Management Server?

Online MSDN article "Execute Statements Against Multiple Servers Simultaneously (SQL Server Management Studio)" (SQL Server 2012) states: "Note Before you execute the following procedures, ...
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1answer
302 views

Where to install Oracle client software on SharePoint 2010 Server

We have our ASP.net web application hosted on a SharePoint Server 2010. Our application uses oracle database to save and retrieve data.For our application to work on SharePoint server we need to ...
0
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0answers
27 views

How to recover data in a MySQL DB?

Log file says: Recently disk space on my VPS got filled up. Now my DB looks corrupted, MySQL error log says: 140319 01:28:57 mysqld started 140319 1:28:57 InnoDB: Started; log sequence number 0 ...
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4answers
193 views

SQL Server 2005 - 2 sets of backups - 2 maintenance plans?

I did my best to search for an answer to this question and couldn't find a scenario quite like this. I'm a fairly new DBA in the sense that I haven't had a ton of training, I basically took the job ...
4
votes
1answer
3k views

ERROR: database “dbname” does not exist

According to the documentation, so long as I'm not connected to a database, I can either delete a database in the console using: DROP DATABASE dbname; Or I can drop it using the wrapper tool ...
4
votes
2answers
441 views

Update Statement takes forever to complete [closed]

I have table around 1250000 records, and 80 columns Table Structure CREATE TABLE [dbo].[Table] ( [Column1] [int] IDENTITY(1, 1) NOT FOR REPLICATION NOT NULL, [Column2] [int] NULL, [Column3] [int] ...
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5answers
648 views

How to determine why a MySQL server has become slow and requests sometimes time out?

I'm working on my first project that makes heavy use of a MySQL database and am struggling to understand performance issues I'm having. Most of the time, responses are returned quickly from the ...
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1answer
36 views

Why Database use Buffer pool for write operation? [closed]

In this case, first we write data in RAM,then same data write in database? Why we need do write operation two time?
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0answers
79 views

Oracle Merge performance

I've a question about the merge performance in oracle. I work in the business intelligence area of a big company and its quite common to have to move millions of records one side to other. The other ...
0
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2answers
143 views

Recovering mysql innodb table from table.ibd backup file

Just practising DB disaster recovery. As per our back up policy, we do complete disk image back ups every half an hour (on our slave server). Now for a scenario, where some how a table has been ...
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2answers
120 views

Triggers After Insert and After Update - Good Practice

It is a good practice to have a separate trigger for After Insert and another one for After Update or there is no problem in having both in the same logic? Also from a perspective of performance it ...
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6answers
748 views

Missing import function in SQL Developer like MS Access has

At my work we used to use MS Access now we are forced to use SQL developer to create queries and export the data. Details: We can only query to the database We cannot create a new database We use ...
1
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3answers
2k views

Proper MySQL database maintenance

I hope this isn't too broad of a question. I'm certain it'll be able to help me and any future dba noobs that stumble upon it. I'm a systems admin that got put into the roll of DBA (because I helped ...
5
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3answers
249 views

Bad use of Oracle Tablespaces

I have a doubt about the use of oracle tablespaces. I've decided to define for each schema of the datababase two different tablespaces (one for data, and another one for indexes). The problem is that ...
0
votes
1answer
156 views

can't connect to postgresql with md5 [closed]

I can connect to db with trust, but it is not letting me to connect with md5. It says : "password authentication failed for user "postgres"" Here what I have in pg_hba.config host all all ...
0
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0answers
68 views

how to archive old entries from mysql on rds

I have an AWS RDS MySQL DB. I have ec2 instances and an s3. What I would like to do is only retain 60days old data and archive the rest. I'm still new at this so I'm not really sure what to do. What ...
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0answers
16 views

ASE 15.03 mixed data and log segements [duplicate]

I have a DB with mixed data & log segments. I also have some log on data device & the other way too.. The target is to have the data & log segments aligned properly , please guide me how ...
0
votes
1answer
601 views

I have mistakenly deleted Datafiles.

In my production server I have mistakenly deleted datafiles. When I am trying to open the database I am getting an error. The files are not important but the database is not opening up. SQL> ...
38
votes
12answers
4k views

How could DBAs be more 'programmer friendly'?

The answers and comments on the dba.se version and programmers.se version of the question "What are the arguments against or for putting application logic in the database layer?" are very revealing ...
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0answers
45 views

MySQL beginner in troubles

My MySQL knowledge isn't really good. However, I tried to move my websites media folder to an other location and afterwards wanted to update the links in my database: UPDATE wp_posts SET ...
0
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0answers
392 views

Firebird-Time Interval- between 2 Dates

I try to select the period of employment for the members in a Company. Example: Date of join: 01.01.2001 Today: 27.02.2014 Now, I want this: 13 years, 1 month and 27 days I have a Statement which ...
1
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1answer
1k views

How to grant rights for a user in DB2 Express?

I have installed DB2 Express on a PC. My user is not an administrator user, however as far as i know, it is possible to grant a user rights, so he can create/delete/modify a database. I have ...
3
votes
1answer
859 views

Confused about load balancing and horizontal scaling in postgresql [closed]

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, ...
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0answers
12 views

Tables not created in default tablespace postgresql

I have create a database with default tablespace 'TEST1' instead of pg_default. the owner of the database and the tablespace is postgres. I log in to the database with postgres -d test create a table ...
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2answers
80 views

How to store a database table in multiple disks with assigned ratio?

I am going to deploy database tables to multiple disks. My database layout would be like following example: There are 3 tables (Customer, Order, Product) and 4 disks (disk_A, B, C, D). Customer: 5% ...
3
votes
2answers
6k views

db2 database alias not listed via list database directory but still unable to create that database

I am trying to create a database by logging on to the linux server on which the db2 server is installed, as the instance owner db2 => list database directory System Database Directory Number ...
0
votes
1answer
253 views

What is a bucket in database? [closed]

I was implementing a code that involves a database and buckets. Just wanted to ask what is bucket and can someone describe it with an example? Thanks!
0
votes
1answer
257 views

replication breaks after upgrading master

I have a set up of replication with master 5.1.30 and slave 5.5.16 and the replication is working good Now i have upgraded mysql master to 5.1.47 As far as i know we have to turn off the log bin ...
1
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1answer
236 views

ORA-12541 error while connecting to oracle express edition 11g

My oracle express edition was working some months earlier. I dont know what i changed in the system, now I could not connect to it. I tried logging in from sqlplus as sysdba and altered the accounts ...
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2answers
310 views

Move a huge databases from one SQL Server to another

I have customers databases located on my SQL Server 2008 machine. The size of these databases are around 300 GB. I would like to move them all to another SQL Server 2008. Is there a way to shrink ...
0
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1answer
67 views

Database Designing Issue

I have a database having Millions of records in three tables. Now i want to split these three tables in multiple tables to reduce redundancy and data duplication. A lot of records(Persons) have ...
0
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1answer
197 views

Which MongoDB administration UIs offer a table view (OS X)?

The only admin UI we found that offers a table view is MongoVue, which is only available on Windows. We're on Macs with OS X. Do any exist?
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2answers
2k views

Restore the latest backup on the database

We have a stored proc which takes the backup from a database to the specified location. Sometimes the backup process runs more than once. It causes having more than one backup set on the same file ...
0
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0answers
61 views

SQL Server A network-related or instance-specific error

I have a windows service that performs a lot of hits to database. Sometimes the database connection is down and I got exception "A network-related or instance-specific error". I got this behavior on ...
0
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0answers
65 views

InnoDB crashes frequently

My Innodb Engine is getting crashed frequently. I could not find the reason behind this. This is the error log: 140129 9:22:49 [Note] Plugin 'FEDERATED' is disabled. 140129 9:22:49 InnoDB: The ...
3
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2answers
4k views

SQL Server Connectivity Issues

I am getting the below error on occasion. Maybe every 30mins or so. I am not sure how to track what is causing the issue. I think it could be a Network problem as there are disk backups running as ...
1
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2answers
258 views

Automatic Failover in Availability Group

I have 2 nodes in my SQL server fail over cluster. I use SQL Server 2012 Availability Groups for HA purpose. The problem is that when one my server goes down the automatic fail over does not happen! ...
0
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2answers
350 views

Generic SQL Job Scheduler for multiple RDBMS's?

I have been searching for an answer to this, but can't seem to find anything. So my problem is this - we have an environment with MS SQL Server 2008, MySQL, and RedShift, and have some complex ...
0
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1answer
67 views

Rotate Postgres log at 5GB

How to make postgres 9.1 log to have maximum size 5GB and to be circle when comes to 5GB ? At the moment my log file is over 500GB. /var/lib/postgres/
2
votes
2answers
202 views

Autogrowth, shrink and database performance

I have already asked some questions about Autogrowth and shrink. But I have some doubts related to it. 1)I have a database which grows about 300 MB every month. So is it best to set Autogrowth of 300 ...
1
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1answer
247 views

Autoclose property resets to true after attaching db even if model is set to false

I am using SQL Server Express 2008 R2. The auto close property of a newly created database will be set to value same as model db. In my case I have set autoclose to false for model so that when I ...
1
vote
1answer
136 views

MS Access + SQL Server for 1160 users - Is it worth it? (Please Help!) [closed]

Our school in Delhi (India) wants to develop a professional and robust in-house database (SIS) that should handle vast amount of student information, including admissions, registration, re-enrollment, ...
0
votes
2answers
1k views

Unable to change engine to MyISAM in MySQL

I have installed MySQL 5.6.10 on Mac OS X 10.6.5. My issue is that MySQL is using InnoDB as its default engine. I have checked following engines are supported in MySQL: show engines\G ...
0
votes
0answers
197 views

Can't connect to local Postgres databases

After trying to install Postgres using Postgres.app and EnterpriseDB, I decided to re-install it using Homebrew (As I got some problems connecting to database). PYTHON=/usr/local/bin/python brew ...
-1
votes
3answers
181 views

Recovering Oracle Database using RMAN [closed]

I am an accidental DBA..I have to restore an oracle database using RMAN utility. I don't know anything about backups and restoration and this is my first assigned task. Are there any good forum(s) ...
4
votes
2answers
2k views

mysql multi threading for a single query

I have big db of size 8GB and having 9 million contacts in this db. When we try to retrieve all contacts, it takes nearly 1 or 2 hour (in some cases result in timeout) to retreive all contacts for the ...
7
votes
3answers
2k views

Is there an Open Source Metadata Management Solution? [closed]

Is there an Open Source Metadata Management Solution? I'd like to create a Metadata Repository that will hold the details of the metadata of database schemas, tables and data items of hundreds of ...