SqlMonitor is a tool that can be used to monitor performance of databases by performing a query at regular intervals and monitoring the time that the query is taking. This can be useful for identifying performance spikes and correlating performance issues across multiple databases.

Queries are scheduled using cron expressions and can be configured to send alerts if their execution time exceeds a defined threshold.

Performance results may be graphed and overlayed upon one another to assist in correlating performance issues.

The SqlMonitor application stores its scheduling/performance data in an SqlServer database.

For running queries, any database driver that supports the ADO.NET 2.0 provider framework should work. I have tested against MS SqlServer 2008 and Sybase 11.9.2 / Sybase 15.5.

• ASP.NET MVC3
• Entity Framework 4.1 (Code First)
• NServiceBus
• Castle Windsor (for IoC)
• Spring.Net (for data access)
• Quartz.Net (for scheduling)
• Bootstrapper
• AutoMapper
• jQuery

• Please ensure that MSMQ is installed before commencing.
• The system should be self installing
  • the database should be created/installed automatically on the .\SQLEXPRESS database.
  • The MSMQ queues should create automatically.

The query scheduling/performance database can be configured by adding/modifing the connection string with name "SqlMonitor" into the section of the application config file in both the web app and the server. For example:

<connectionStrings>
   <add name="SqlMonitor" connectionString="server=.\SQLEXPRESS;database=SqlMonitor;user=SqlMonitor;password=$q1m0n;Integrated Security=False" providerName="System.Data.SqlClient"/>    
</connectionStrings>

To configure databases to query from, add connection strings for the databases into the SqlMonitor.Server app.config file and then add the names of the connection strings into the SqlMonitor.Web web.config file in the DatabaseNames app setting:

<add key="DatabaseNames" value="Orders,Billing,Shipping"/>

To debug:

• open the solution properties
  • select 'Multiple Startup Projects'
  • set action for SqlMonitor.Server and SqlMonitor.Web to 'Start'
• open the SqlMonitor.Server project properties.
  • select the Debug tab
  • under 'Start Action', select 'Start external program'
  • browse to the SqlMonitor.Server\bin\debug folder and select NServiceBus.Host.exe

Here is a screenshot of the query listing page. The graph at the bottom is showing the results of two different queries against different databases.

Here is a screenshot of the 'add query' page. The help information for the cron expressions is shown in a popup.

Here is a screenshot of the 'query details' page. This page shows the configuration of the query and generates graphs of the query results, including a threshold line.

For any questions or comments, please contact me - paulduran at gmail dot com