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Measures reported by PgIndexStatsTest
An index is a data structure that a database uses to reduce the amount of time it takes to perform certain operations. An index can also be used to ensure that duplicate values don't appear where they are not needed.
TThis test monitors the indexes on the PostgreSQL server and helps administrators quickly and accurately assess the effectiveness of these indexes. The measures made by this test are as follows:
| Measurement |
Description |
Measurement
Unit |
Interpretation |
| Number_of_index_scan |
Indicates the rate at which the index scans are initiated on this index in this database. |
Scans/Sec |
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| Number_of_row_read |
Indicates the rate at which the index entries (rows) are read during the index scans. |
Reads/Sec |
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| Number_of_row_fetch |
Indicates the rate at which the rows are fetched from this index upon execution of a query. |
Fetches/Sec |
If the value of this measure is greater than the value of the Number_of_row_read measure, it indicates that there is a possibility of index fragmentation or the executed query is inefficient. |
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