SQL Azure Top Queries Test

The real test of the performance of a database server lies in how quickly the database responds to queries. Whenever users complaint of slow execution of their queries, administrators need to know the reason for the delay - is it because the queries themselves are badly designed? or is it due to a longer CPU wait time? or is it because of some queries consuming too much of physical reads per execution? The SQL Azure Top Queries test helps with this root-cause analysis.

This test monitors each database instance in the target Microsoft SQL Azure database server and reports the maximum physical reads and logical reads consumed per SQL query execution. The maximum CPU time and time elapsed per query execution are also identified. The detailed diagnosis of this test lists the top queries that consumed the maximum physical and logical reads. Administrators can use the detailed diagnosis and figure out the queries that are executing with delays.

Target of the test : A Microsoft SQL Azure database server

Agent deploying the test : An external/remote agent

Outputs of the test : One set of results for the target Microsoft SQL Azure Database server being monitored.

Configurable parameters for the test
  1. Test period - How often should the test be executed
  2. Host - The host for which the test is to be configured.
  3. ssl – If the Microsoft SQL server being monitored is an SSL-enabled server, then set the ssl flag to Yes. If not, then set the ssl flag to No.
  4. instance - In this text box, enter the name of a specific Microsoft SQL instance that is to be monitored. The default value of this parameter is “default”. To monitor an Microsoft SQL instance named “CFS”, enter this as the value of the INSTANCE parameter.
  5. USER – Provide the name of a SQL user with the view server state role.
  6. password - The password of the specified user.
  7. confirm password - Confirm the password by retyping it
  8. domain - By default, none is displayed in the DOMAIN text box. If the ‘SQL server and Windows’ authentication has been enabled for the server being monitored, then the DOMAIN can continue to be none. On the other hand, if ‘Windows only’ authentication has been enabled, then, in the DOMAIN text box, specify the Windows domain in which the managed Microsoft SQL server exists. Also, in such a case, the USER name and PASSWORD that you provide should be that of a user authorized to access the monitored SQL server.
  9. isntlmv2 - In some Windows networks, NTLM (NT LAN Manager) may be enabled. NTLM is a suite of Microsoft security protocols that provides authentication, integrity, and confidentiality to users. NTLM version 2 (“NTLMv2”) was concocted to address the security issues present in NTLM. By default, the isntlmv2 flag is set to No, indicating that NTLMv2 is not enabled by default on the target Microsoft SQL host. Set this flag to Yes if NTLMv2 is enabled on the target host.
  10. ISPASSIVE – If the value chosen is yes, then the Microsoft SQL server under consideration is a passive server in a SQL cluster. No alerts will be generated if the server is not running. Measures will be reported as “Not applicable’ by the agent if the server is not up.
  11. REPORTMANAGERTIME – By default, this flag is set to Yes, indicating that, by default, the detailed diagnosis of this test, if enabled, will report the shutdown and reboot times of the device in the manager’s time zone. If this flag is set to No, then the shutdown and reboot times are shown in the time zone of the system where the agent is running(i.e., the system being managed for agent-based monitoring, and the system on which the remote agent is running - for agentless monitoring).
  12. To make diagnosis more efficient and accurate, the eG Enterprise embeds an optional detailed diagnostic capability. With this capability, the eG agents can be configured to run detailed, more elaborate tests as and when specific problems are detected. To enable the detailed diagnosis capability of this test for a particular server, choose the On option. To disable the capability, click on the Off option.

    The option to selectively enable/disable the detailed diagnosis capability will be available only if the following conditions are fulfilled:

    • The eG manager license should allow the detailed diagnosis capability
    • Both the normal and abnormal frequencies configured for the detailed diagnosis measures should not be 0.
Measurements made by the test
Measurement Description Measurement Unit Interpretation

Maximum physical reads

Indicates the maximum physical reads consumed per execution of an SQL query on the SQL Azure database instance.

Reads/execution

The detailed diagnosis of this measure lists the Database id, Object name, Type desc, Sql handle, Cached time, Last execution time, Execution count, Physical reads count, Physical reads per exec, Logical writes count, and Logical writes per exec.

Maximum logical reads

Indicates the maximum logical reads consumed per execution of an SQL query on the SQL Azure database instance.

Reads/execution

The detailed diagnosis of this measure lists the Database id, Object name, Type desc, Sql handle, Cached time, Last execution time, Execution count, Logical reads count, Logical reads per exec, Logical writes count and Logical writes per exec.

Maximum CPU time

Indicates the maximum CPU time taken per execution of the SQL query on the SQL Azure database instance.

Seconds/execution

The detailed diagnosis of this measure lists the Database id, Object name, Type desc, Sql handle, Cached time, Last execution time, Execution count, CPU time(Seconds), CPU time per exec(seconds), Logical writes count and Logical writes per exec.

Maximum elapsed time

Indicates the maximum time elapsed per execution of an SQL query on the SQL Azure database instance.

Seconds/execution

The detailed diagnosis of this measure lists the Database id, Object name, Type desc, Sql handle, Cached time, Last execution time, Execution count, Elapsed time(Seconds), Elapsed time per exec(Seconds), Logical writes count and Logical writes per exec.