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3answers
245 views

What is SQL Server 2000 spid -2?

I have a SQL Server 2000 machine that has a pretty big database on it - almost a terabyte in size. There's a particular table that has been a source of some production issues and any attempt to try ...
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1answer
333 views

What is the significance of root and page level fragmentation in a clustered b-tree index?

In investigating fragmentation on some of our large tables in a SQL Server 2005 database, I was using a query based on sys.dm_db_index_physical_stats. The query returns a row for each level in the ...
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1answer
456 views

How should I distribute my tables for better performance from fragmentation point of view

I have a database on SQL Server 2008 R2 with about 20 non-indexed tables that are continuously undergoing INSERTs AND DELETEs. There are about 400,000 records @ 4KB/record being inserted or deleted ...
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1answer
61 views

Options for Index Defragmentations For Critical Tables

I wonder if this is a suitable solution for index defragmentations. scenario is like this; There is a table named 'Events' which is very critical and has 4 indexes which are not done maintenance ...
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1answer
2k views

MySQL Index Fragmentation

Is there any way to find out the fragmentation of indexes in MySQL ? If such an output can be obtained, it would be helpful to identify which all indexes need to be rebuilt. I'm using MySQL 5.1 on ...
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1answer
852 views

Defrag or Backup+Restore

I have an MDF file that was autogrown from 1MB to 40GB in 10% increment. The file is heavily fragmented now, and I want to defrag it with minimum downtime. I have a plan that I am not sure will work: ...
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1answer
768 views

How to Prevent an Ever-Growing index file (MyISAM engine) From Causing Disk Fragmentation in Windows (NTFS partition)?

We have a keep-growing table which using MYISAM storage engine. Almost every half year, this table will crash, and need to be repaired. I checked the defragment result reported by windows ...
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1answer
73 views

SQL Server : how can I measure database performance increase after index maintenance?

We are using a SQL Server 2005 database. We currently have no maintenance on our databases indexes. Some of our indexes are showing over 85% fragmentation when looking at the table ...
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2answers
198 views

For merge replication, do I need to schedule index maintenance on all sites or just publisher?

I have a very fragmented database that uses merge replication with remote sites. Do I need to schedule index maintenance (reorganize / rebuild) for all sites? Or just on publisher copy?
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1answer
271 views

Equivalent of MRG_MYISAM in databases other than MySQL? [closed]

Does anyone know if other database have something equivalent to MRG_MYISAM (aka the MERGE table type/storage engine)? I know about fragmenting, but this is not quite the same AFAIK. We're using ...
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1answer
70 views

What is the cause of high index fragmentation in SQL server?

We have an application which is using a SQL Server database. As the application is in use for many years, its database is of huge size, resulting in slowness of application. It was noticed that the ...
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0answers
51 views

Fragmented clustered primary key (sequential GUID) index after processing - SQL Server

I'm in the process of evaluating a schema change on the primary keys of several of our biggest tables in our software. Till now we used varchar(36) for all of our PKs and FKs and Hibernate generated ...
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0answers
68 views

Defragmentation of SQL Server 2008 indexes

I am having issues defragmenting indexes. I keep using the various defragmentation methods for defragmenting a SQL Server index such as DBCC INDEXDEFRAG and DBCC DBReIndex, but none seem to be ...
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0answers
121 views

Measure fragmentation of a single index?

We are measuring the impact of different defrag approaches that we do one index at a time. How do we query to see fragmentation of a single index, by index name (or table + index). This is on SQL ...
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2answers
1k views

Difference between partitioning and fragmentation [closed]

I'm trying to learn something about distributed databases and I stumbled upon the concepts of fragmentation and partitioning. It seems to me as if both do the same thing and produce similar results ...
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1answer
49 views

Verify this TSQL to find the indexes fragmented over 50%

select OBJECT_SCHEMA_NAME(IPS.object_id) 'schema', OBJECT_NAME(IPS.object_id) as table_name,index_type_desc, round(avg_fragmentation_in_percent,2) 'avg_fragmentation_in_percent', si.name ...
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1answer
106 views

Rebuild Indexes on SQL Server Standard edition

We have SQL Server 2008 R2 Standard on a Windows Server cluster. I want to defrag all indexes on a database. What is the best approach to disable all connections and allow the rebuild of indexes? ...
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1answer
31 views

One time database shrink catch-22 solution?

I am developing a plan for SQL Server 2012 EE to properly downsize and type (nchar to char types) some needlessly Unicode nvarchar(max) fields and would like to optimize the database size as part of ...
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1answer
589 views

Model for Distributed Database [closed]

I want to design a model for a distributed database solution. Are there appropriate tools and approaches? How to include stereotypes for (horizontal) fragments?
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1answer
40 views

dm_db_index_physical_stats results inconsistent with actual object properties - what may be the reasons?

SQL Server 2008 RTM (10.0.1600.22) Running a typical index fragmentation report on a table: SELECT OBJECT_NAME(i.OBJECT_ID) AS TableName, i.name AS IndexName, s.index_type_desc, ...
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1answer
2k views

When to rebuild and when to reorganize indexes [duplicate]

I have been trying to gather information about rebuilding and reorganizing indexes. From stackoverflow page (How Often should the indexes be re-build in sql-server DB?) i got this query : SELECT ...
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2answers
65 views

How can I defragment tables in MySQL?

I have a database named COUNTY. COUNTY has a fragmented table GEO. I executed OPTIMIZE TABLE GEO against the GEO table, but this returned the error "Table does not support optimize, doing ...