eG Monitoring
 

Measures reported by MariaStatsTest

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.

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

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_by_full_table_scan Indicates the number of joins that were performed by full table scan. Number  
Join_by_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.
Executed_with_good_index Indicates the number of statements that were executed using good indexing techniques. Number  
Executed_by_no_goodindex 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.