Difference between revisions of "SYSIOSTATS"
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==Purpose== | ==Purpose== | ||
Facility for monitoring table and index file I/O operations | Facility for monitoring table and index file I/O operations | ||
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==See Also== | ==See Also== | ||
[[SQL Data Types|DATA TYPES]], [[SQL SELECT|SELECT]], [[SQL System Tables|SYSTEM TABLES]] | [[SQL Data Types|DATA TYPES]], [[SQL SELECT|SELECT]], [[SQL System Tables|SYSTEM TABLES]] | ||
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==Description== | ==Description== | ||
System Tables are system defined read-only tables. You can query these tables using the SELECT statement. | System Tables are system defined read-only tables. You can query these tables using the SELECT statement. | ||
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!Column||Data Type||Width||Description | !Column||Data Type||Width||Description | ||
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==Example== | ==Example== | ||
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</code> | </code> | ||
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[[Category:Documentation]] | [[Category:Documentation]] | ||
[[Category:SQL]] | [[Category:SQL]] | ||
[[Category:System Tables]] | [[Category:System Tables]] | ||
| − | [[Category:Performance | + | [[Category:Performance and Optimization]] |
Latest revision as of 06:33, 4 February 2013
Contents
Purpose
Facility for monitoring table and index file I/O operations
See Also
DATA TYPES, SELECT, SYSTEM TABLES
Description
System Tables are system defined read-only tables. You can query these tables using the SELECT statement.
| Column | Data Type | Width | Description |
|---|---|---|---|
| TABLE_NAME | C | 30 | Table name |
| READS | N | 10 | # of row reads for table |
| UPDATES | N | 10 | # of row updates for table |
| DELETES | N | 10 | # of row deletes for table |
| RECALLS | N | 10 | # of row recalls for table |
| INSERTS | N | 10 | # of row inserts for table |
| DCACHEREADS | N | 10 | # of cache reads for table |
| DCACHEWRITES | N | 10 | # of cache writes for table |
| INDEXREADS | N | 10 | # of index reads for table |
| INDEXWRITES | N | 10 | # of index writes for table |
| ICACHEREADS | N | 10 | # of index cache reads for table |
| ICACHEWRITES | N | 10 | # of index cache writes for table |
Example
SELECT icachereads FROM sysiostats
