Maintaining A Healthy WhosOn Database - Event Date: 11 Jan 2007 - 11 Jan 2007

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   If you are using a SQL database to store you WhosOn data.. and you have a reasonable amount of traffic (say have a database size more than 1GB), then you should perform regular maintenance on the database to keep the database healthy and maintain optimal performance.

This article shows how to do this for SQL Server 2005 (similar maintenance functions also exist in MySQL).

If you are using SQL Server 2005 full version (not Express), then you should create a Maintenance Plan for the WhosOn DB that executes weekly (say Sunday morning). This maintenance plan should be set to Reorganize each table and the perform a Shrink database. This plan can be run whilst WhosOn is running.

If you are using SQL Server 2005 Express edition then you wont be able to do this because express does not include the Maintenance plan wizard.. however you can do the same by executing some queries manually.

The following queries with regorganize all the main indexes and shrink the database. These can be executed against the WhosOn database in the SQL Server Management studio:

USE [WhosOnV4]
GO
ALTER INDEX [Exceptions_key0] ON [dbo].[Exceptions] REORGANIZE WITH ( LOB_COMPACTION = ON )
ALTER INDEX [Exceptions_key1] ON [dbo].[Exceptions] REORGANIZE WITH ( LOB_COMPACTION = ON )
ALTER INDEX [Exceptions_key2] ON [dbo].[Exceptions] REORGANIZE WITH ( LOB_COMPACTION = ON )
ALTER INDEX [Keywords_key0] ON [dbo].[Keywords] REORGANIZE WITH ( LOB_COMPACTION = ON )
ALTER INDEX [Keywords_key1] ON [dbo].[Keywords] REORGANIZE WITH ( LOB_COMPACTION = ON )
ALTER INDEX [Page_key0] ON [dbo].[Page] REORGANIZE WITH ( LOB_COMPACTION = ON )
ALTER INDEX [Pages_key0] ON [dbo].[Pages] REORGANIZE WITH ( LOB_COMPACTION = ON )
ALTER INDEX [Pages_key1] ON [dbo].[Pages] REORGANIZE WITH ( LOB_COMPACTION = ON )
ALTER INDEX [Referrers_key0] ON [dbo].[Referrers] REORGANIZE WITH ( LOB_COMPACTION = ON )
ALTER INDEX [Referrers_key1] ON [dbo].[Referrers] REORGANIZE WITH ( LOB_COMPACTION = ON )
ALTER INDEX [Visit_key0] ON [dbo].[Visit] REORGANIZE WITH ( LOB_COMPACTION = ON )
ALTER INDEX [Visit_key1] ON [dbo].[Visit] REORGANIZE WITH ( LOB_COMPACTION = ON )
ALTER INDEX [Visit_key2] ON [dbo].[Visit] REORGANIZE WITH ( LOB_COMPACTION = ON )
ALTER INDEX [Visit_key3] ON [dbo].[Visit] REORGANIZE WITH ( LOB_COMPACTION = ON )
ALTER INDEX [Visitors_key0] ON [dbo].[Visitors] REORGANIZE WITH ( LOB_COMPACTION = ON )
ALTER INDEX [Visitors_key1] ON [dbo].[Visitors] REORGANIZE WITH ( LOB_COMPACTION = ON )
USE [WhosOnV4]
GO
DBCC SHRINKDATABASE("WhosOnV4", 10, TRUNCATEONLY)

You can run these whilst WhosOn is running. We recommend you do this once per month at least.

You can also execute the following stored procedure to view the status of the WhosOn DB:

EXEC sp_MSforeachtable @command1="print '?' DBCC SHOWCONTIG('?')"

Steve