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slug: /en/operations/system-tables/graphite_retentions
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---
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# graphite_retentions
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Contains information about parameters [graphite_rollup ](../../operations/server-configuration-parameters/settings.md#server_configuration_parameters-graphite ) which are used in tables with [\*GraphiteMergeTree ](../../engines/table-engines/mergetree-family/graphitemergetree.md ) engines.
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Columns:
- `config_name` (String) - `graphite_rollup` parameter name.
- `regexp` (String) - A pattern for the metric name.
- `function` (String) - The name of the aggregating function.
- `age` (UInt64) - The minimum age of the data in seconds.
- `precision` (UInt64) - How precisely to define the age of the data in seconds.
- `priority` (UInt16) - Pattern priority.
- `is_default` (UInt8) - Whether the pattern is the default.
- `Tables.database` (Array(String)) - Array of names of database tables that use the `config_name` parameter.
- `Tables.table` (Array(String)) - Array of table names that use the `config_name` parameter.
