SQL Azure Query Plans Test
When SQL Azure server executes a query it uses a query plan to determine how to access data and complete the query. SQL server offers administrators and developers the ability to see these query plans to assist in query optimization. Without query plans it would be difficult to figure out how to tune and optimize the queries. The Query Execution Plans describe the steps and the order used to access or modify data in the Microsoft SQL Azure database server. The Query Plan defines how SQL statements are physically executed by the server. The Query Plan describes the data retrieval and storage methods that are used by the Query Optimizer to execute a specific query. The executed Query Plans are also stored in the Procedure Cache, so they can be retrieved and reused if a similar query is executed. If the Query Plan in the stored Procedure Cache consumes too much of memory, more query plans cannot be stored in the cache. This would delay the execution of the query plans on the SQL Azure databases. Therefore, it is necessary to monitor the memory consumed by each query plan in the cache. The SQL Azure Query Plans test helps administrators in this regard!
This test auto-discovers the query plans executed on the target Microsoft SQL Azure database server, and reports the maximum amount of memory consumed by each query plan.
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 every Microsoft SQL Azure database server instance being monitored
Configurable parameters for the test
- Test period - How often should the test be executed
- Host - The host for which the test is to be configured.
- 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.
- 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.
- USER – Provide the name of a SQL user with the view server state role.
- password - The password of the specified user.
- confirm password - Confirm the password by retyping it
- 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.
- 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.
- 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.
- 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).
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
Maximum memory consumed query plan
Indicates the maximum amount of memory consumed by this query plan.
Use the detailed diagnosis of this measure to figure out the query plans that consumed the maximum amount of memory.