In the context of a database, maintenance describes routine operational tasks around a database system, such as monitoring, tuning and backup procedures.

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Disable/Remove Table Index for INSERT Performance

I am doing a database maintenance where I have to add new fields to a table with over 10GB of data about (20 million rows). To solve that I renamed tableA to be old_tableA and created a new table ...
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121 views

Setting BUFFERCOUNT, BLOCKSIZE, and MAXTRANSFERSIZE for BACKUP command

I am looking for practical guidance for setting the values for the BUFFERCOUNT, BLOCKSIZE, and MAXTRANSFERSIZE of the BACKUP command. I have done a bit of research (see below), I have done a bit of ...
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46 views

Index Maintenance taking long time - Primary Key (Clustered Index) Varchar(35) [closed]

I have a table in my database that contains around 70 Million rows. Unfortunately the database designer had made the primary key (Clustered Index) column of type : Varchar(35). Obviously this is ...
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3answers
45 views

MySQL: can I put the database into a maintenance mode? (i.e. no user connections)

I'm going to be doing some complicated maintenance on our MySQL servers and I'd like to keep users out during the work. I'd prefer not to drop and re-create all of the user accounts, but that's the ...
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2answers
41 views

System Databases Integrity Check & Full Backup

I have an SQL Server 2008 and for maintenance solutions I use Ola Hallengren scripts. Recently, out of 15 databases I have on this server, I made two changes in three of them (not system databases, ...
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35 views

DB2: Reorg and RunStats

Is there any frequency at which i should run REORG and RUNSTATS on my master tables? If i have a daily load of around 1,000,000 records into my table would it be suggestible to run a REORG and ...
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54 views

Rebuild index online without risk to other requests

We have a MS sql server 2012 enterprise database whose indices fragment very fast. We use a maintenance plan that reorganizes those indices daily, and rebuilds them weekly. The rebuild happens ...
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189 views

Does index rebuild time depend on the fragmentation level?

Is the required time for index rebuild dependent on the level of fragmentation? Does the rebuild of a 80% fragmented index approximately take 2 minutes if the rebuild of the same index fragmented ...
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35 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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102 views

Weekly full backups and daily differential backups, saving the full backups from each week?

I am wanting to create a maintenance plan that performs a full backup that is done every Sunday morning. After work hours on Monday through Friday, I want to perform a differential backup based on ...
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57 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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107 views

Maintenance plan fails on non-existent database

We have a maintenance plan on our production server which does all the usual stuff... checking integrity, rebuilding indexes, backups, etc. Lately, it has been failing every night, complaining about ...
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136 views

MySQL indexes maintenance

I made a lot of research about how to maintain indexes in MySQL to prevent fragmentation and to optimize somehow the execution of some queries. I am familiar with that formula that calculates the ...
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324 views

Guidelines for full-text index maintenance

What guidelines should be considered for maintaining full-text indexes? Should I REBUILD or REORGANIZE the full-text catalog (see BOL)? What is a reasonable maintenance cadence? What heuristics ...
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1answer
138 views

Preventing full backups for unmodified/slightly modified databases

Is there a way to either: ensure that unmodified databases are skipped during SQL backups, or even better choose between DIFF or FULL backup depending on the percent database changed since last ...
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1answer
108 views

Is it possible to set a timer for autovacuum in PostgreSQL

I am running PostgreSQL 9.4.1. I am currently cleaning up data, which requires me to run expensive queries. It seems like my tables get "locked" up every day at the same time in the afternoon. My ...
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1answer
112 views

Rebuild vs Reorganize [duplicate]

I currently have a maintenance plan that is reorganizing indexes everyday and I would like to know if you reorganize an index everyday would you ever need to rebuild the index? If so, why?
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1k views

Occasional error shrinking transaction log files

I have a transaction backup job which runs every hour. First it runs a backup of the database log to another drive, then it shrinks the log and deletes old .trn files. The middle task shrinks the ...
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5k views

Automatically restore SQL Server database from file from another server

We have a daily task to overwrite a number of development databases using backups of the associated production databases. The backups are produced by maintenance plans on the production server then ...
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2answers
43 views

Is it a good idea to add a reserved field to a large MySQL table?

As you may know adding a new column to a MySQL table with millions of records is hard and in some cases impossible. Is it a good idea to add a text column to each table (say, meta) to save some ...
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1answer
765 views

SQL Maintenance Rebuild Fails

I am pretty new to SQL and I have this maintenance job that keeps failing and I am not sure how to troubleshoot this. I have troubleshot other job failures with google help to success but this one is ...
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1answer
184 views

Index file growing endlessly - how to fix it?

I need to do some maintenance on a database on our client's site. Both log and index files were huge (Don't know how they took their backups to end this way) anyway I fixed the log file (.ldf) issue, ...
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1answer
190 views

Ola Hallengren index maintenance - long periods of time between commands?

I run the Ola Hallengren scripts on all of my servers for index and statistics maintenance. When I look through the command log table, I notice long periods of time between a command ending, and the ...
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2k views

Do you have to run nodetool repair on every node?

Do you have to run nodetool repair on every node in a cluster, or do you only need to run it on one node, and from there Cassandra will take care of the rest?
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1answer
68 views

Can autoshrink permanently damage a database? [duplicate]

I've been given the task of finding out why our server is slow. I ran a stored procedure I downloaded called sp_Blitz. It let me know that our database had auto-shrink enabled, and to disable it. So, ...
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1answer
97 views

SQL User with only access to maintain indexes and statistics

I need to have an AD user account with access to all databases on a specific instance of SQL Server 2008 R2, and the only thing that user will be doing is; Reorganize indexes Database integrity ...
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149 views

Appropriate use of mysql Optimize Table

I want to come up with some best practice for maintaining our mysql database. versions 5.5/6 and using InnoDB. i came across this artice - ...
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4k views

Oracle DB occasionally slows down when “Setting Resource Manager plan DEFAULT_MAINTENANCE_PLAN”

After midnight Oracle Database 12c turned to "slow mode". DML statements became about 10 times slower, though "selects" feel good. CPU load as usual, disk I/O is perfect (tested by copying 500m file), ...
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49 views

Index Maintenance Plan

At our organisation we are migrating to SQL Server from visual foxpro dbf and hence had no maintenance plans and have no DBA. We have gone through our backup plans and Index maintenance is only index ...
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18k views

What is the use of “Backup set will Expire:” option while creating Backup Database task in Maintenance plan

While backing up the database, I would like to use "Backup set will Expire:" option to delete/overwrite old database backups. I am not able to use this option. Any advice on how to use "Backup set ...
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87 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 ...
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2answers
479 views

Ola Hallengren with database mirroring

I am about to setup Ola Hallengrens database maintenance plan. We have our database mirrored and I was just wanting to know if I need to run the script on both my Sql Server instances or only the ...
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1answer
690 views

SQL Server 2008 R2 index rebuild fails with severity 17

Occasionally during our index maintenance, the job will fail with a SEV 17 error where enough space can not be allocated for the object it is rebuilding. The database is laid out as such: Data_file1 ...
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40 views

Running several versions of a MySQL database in parallel?

We have a central read-only MySQL database that contains geo data, etc. It is used by various projects. As part of a refactoring, I am thinking about setting up a system for versioning the database. ...
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2k views

How can I search SQL Server for maintenance plans that execute specific tasks?

Sometimes certain SQL Server maintenance plan tasks can be problematic, like Shrink Database, Rebuild Index, Update Statistics, etc. I'd like to search for the use of one or more of these tasks on an ...
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1answer
177 views

Jobs for cycling error logs

Couple of weeks ago I asked this question Error logs various questions and got the answer I needed. Based on the answer and some readings I want to create the following jobs: cycle the error log ...
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161 views

backup history script produces incorrect results

I have a database that is backed up via maintenance plan. The database is scheduled to be backed up at 8:00PM. It usually takes 6 hours to complete. According to this query, SELECT distinct ...
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2answers
5k views

Shrink the database only up to its initial size which is set after creating database

In SQL server every database has a property Initial Size (MB) which can be seen in properties of database in SSMS. By default it will be 3 MB for mdf and 1 MB for ldf file. So now if create a new ...
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67 views

What are the compelling resons to update SQL Server name to a real one after its changing?

Took the job of monitoring and tuning a few dozens SQL Server 2012 Enterprise Ed. SP1 (64 bit) on Windows Server 2008 R2 Standard Ed. running inside virtual machines. All of them on running ...
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248 views

Does DBA need (a read) access to virtualization infrastructure? And why?

I am in charge of monitoring, troubleshooting, tuning and optimizing a few dozens production SQL Servers 2008 R2/2012 in my company that are being run inside VMWare virtual machines. I've requested ...
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Can maintenance plans be used in SQL Server multiserver (Master-Target servers) administration?

Since I failed to configure SQL Server 2012 Multiserver (Master and Target Servers) administration, I am eager to understand whether it (setting Master and Target servers) would permit to send from ...
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610 views

How can I detect which indexes are being rebuilt offline and how long?

The rebuild of indexes takes appr. the same 55 min. with both "Do not rebuild indexes and "Rebuild indexes offline" "For index types that do not support index rebuilds" with "Keep index online while ...
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3k views

What's the owner of SqlServerAgent job for?

What is the possible use of owner of an SQL Server Agent job, I wonder? Removed, and left it blank and the job still succeeds
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1k views

Any way to send notifications to different Emails on success/failure of SqlServerAgent job?

SQL Server 2012 R2 on Windows Server 2008R2 Is there any way to send notifications to different Emails: on success of an Sql Server Agent job to one Email address and on failure - to another ? ...
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1answer
2k views

How to launch SQL Server Agent job on completion of another one?

An SQL Server Agent job (SSA) have to be executed after a few other SSA jobs. Is there any way to start SSA jobs on completion (or success, or failure) of another one? Currently, I do this on ...
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5answers
7k views

How to delete the remote files older than N days on schedule from SQL Server 2012 (with SqlServerAgent job)?

Struggling to execute PowerShell commands in SqlServer Agent job of MS SQL Server 2012 R2 (Windows Server 2008R2, Windows 7 Prof) I need to delete (.bak files older, than, say, 7 days in remote ...
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3answers
463 views

How to make SQL Server Agent job history less verbose?

So, I've created a SQL Server Agent job, according to the answer to my prev question: running nightly (at 2:11) according to the schedule: There are 9 .bak files in 3 subdirectory of ...
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2answers
7k views

How to copy backup files to remote share in SQL Server Agent job without AD/domain accounts involvement?

MS SQL Server 2012... with nightly databases backups to the same/local as SQL Server machine... I am trying to add another SQL Server Agent Job to copy the .bak files to remote (non-windows, i.e. ...
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216 views

Does failed task considered to be run to completion in SQL Server maintenance plan terminology?

The replies to my previous question: "How to specify a SQL Server maintenance plan subtask to run unconditionally on success or failure of preceding tasks?" answered me that I should change ...
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125 views

Renaming a production database

We have a production database that we have identified needs some maintenance as a colleague leaves - some column deletion and renaming, and a couple of table renames We're trying to find the best ...