Maria Execution Statistics Test

The test reports the sort and join operations performed on the target database server. Using this test, administrators can figure out how many table scans were performed with index and how many table scans were performed without index. Administrators can also figure out the rate at which sorting was performed by scanning the table using full table scan method.

Target of the test : A Maria Database server

Agent deploying the test : An internal/remote agent

Outputs of the test : One set of results for the database being monitored

Configurable parameters for the test
Parameter Description

Test Period

How often should the test be executed.

Host

The IP address of the Maria Database server.

Port

The port on which the server is listening.

Database

Specify the name of the database that is to be monitored on the target Maria Database server.

User and Password

The eG agent has to be configured with the credentials of a user who has server-wide process and select privileges on the monitored Maria Database server. To know how to create such a user, refer to Configuring the eG Agent with Access Privileges section.

Confirm Password

Confirm the password by retyping it here.

Detailed Diagnosis

To make diagnosis more efficient and accurate, the eG Enterprise suite 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

Sorts performed by range

Indicates the number of sorts performed on the statements that shared a similar range.

Number

 

Range sort rate

Indicates the rate at which ranges were sorted.

Sorts/sec

 

Sorts by full table scan

Indicates the number of sorts performed using a full table scan.

Number

Full table scans may sometimes cause a huge amount of unnecessary I/O, placing a processing burden on the entire database. Therefore, a low value is desired for this measure.

Full table scan rate

Indicates the rate at which sorting was performed by scanning the table using full table scan method.

Sorts/sec

 

Sorts by merge passes

Indicates the number of merge passes that were performed using the sort algorithm.

Number

 

Merge passes sort rate

Indicates the rate at which the sort algorithm performed merge passes.

Sorts/sec

If this value is large you should consider increasing the sort_buffer.

Joins not using index

Indicates the number of joins that do not use an index.

Number

 

Joins performed by full table scan

Indicates the number of joins that were performed by full table scan.

Number

 

Range check joins without keys

Indicates the number of joins that were performed in a range without using the keys after each row.

Number

 

Table scan with index

Indicates the number of table scans that were performed with index.

Number

The detailed diagnosis of this measure lists the Thread ID, Event ID, name of the event, the start time, end time and the duration of the event.

Table scan without index

Indicates the number of table scans that were performed without index.

Number

A low value is desired for this measure.

Statements executed using good index

Indicates the number of statements that were executed using good indexing techniques.

Number

 

Statements executed using bad index

Indicates the number of statements that were executed without proper indexing techniques.

Number

The detailed diagnosis of this measure reveals the Thread ID, Event ID, name of the event, the start time, end time and the duration of the event.