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# system.quota_usage {#system_tables-quota_usage}
当前用户的配额使用情况: 使用了多少, 还剩多少.
列信息:
- `quota_name` ([String](../../sql-reference/data-types/string.md)) — 配额名称.
- `quota_key`([String](../../sql-reference/data-types/string.md)) — 配额数值. 比如, if keys = \[`ip address`\], `quota_key` 可能有一个值 ‘192.168.1.1’.
- `start_time`([Nullable](../../sql-reference/data-types/nullable.md)([DateTime](../../sql-reference/data-types/datetime.md))) — 计算资源消耗的开始时间.
- `end_time`([Nullable](../../sql-reference/data-types/nullable.md)([DateTime](../../sql-reference/data-types/datetime.md))) — 计算资源消耗的结束时间.
- `duration` ([Nullable](../../sql-reference/data-types/nullable.md)([UInt64](../../sql-reference/data-types/int-uint.md))) — 计算资源消耗的时间间隔长度, 单位为秒.
- `queries` ([Nullable](../../sql-reference/data-types/nullable.md)([UInt64](../../sql-reference/data-types/int-uint.md))) — 在此间隔内的请求总数.
- `query_selects` ([Nullable](../../sql-reference/data-types/nullable.md)([UInt64](../../sql-reference/data-types/int-uint.md))) — 在此间隔内查询请求的总数.
- `query_inserts` ([Nullable](../../sql-reference/data-types/nullable.md)([UInt64](../../sql-reference/data-types/int-uint.md))) — 在此间隔内插入请求的总数.
- `max_queries` ([Nullable](../../sql-reference/data-types/nullable.md)([UInt64](../../sql-reference/data-types/int-uint.md))) — 最大请求数.
- `errors` ([Nullable](../../sql-reference/data-types/nullable.md)([UInt64](../../sql-reference/data-types/int-uint.md))) — 抛出异常的查询数.
- `max_errors` ([Nullable](../../sql-reference/data-types/nullable.md)([UInt64](../../sql-reference/data-types/int-uint.md))) — 最大错误数.
- `result_rows` ([Nullable](../../sql-reference/data-types/nullable.md)([UInt64](../../sql-reference/data-types/int-uint.md))) — 结果给出的总行数.
- `max_result_rows` ([Nullable](../../sql-reference/data-types/nullable.md)([UInt64](../../sql-reference/data-types/int-uint.md))) — 最大结果行数.
- `result_bytes` ([Nullable](../../sql-reference/data-types/nullable.md)([UInt64](../../sql-reference/data-types/int-uint.md))) — 用于存储查询结果的RAM容量(以字节为单位).
- `max_result_bytes` ([Nullable](../../sql-reference/data-types/nullable.md)([UInt64](../../sql-reference/data-types/int-uint.md))) — 用于存储查询结果的最大RAM容量，以字节为单位.
- `read_rows` ([Nullable](../../sql-reference/data-types/nullable.md)([UInt64](../../sql-reference/data-types/int-uint.md))) — The total number of source rows read from tables for running the query on all remote servers.
- `max_read_rows` ([Nullable](../../sql-reference/data-types/nullable.md)([UInt64](../../sql-reference/data-types/int-uint.md))) — 参与查询的所有表和表函数中读取的最大行数.
- `read_bytes` ([Nullable](../../sql-reference/data-types/nullable.md)([UInt64](../../sql-reference/data-types/int-uint.md))) — 参与查询的所有表和表函数中读取的总字节数.
- `max_read_bytes` ([Nullable](../../sql-reference/data-types/nullable.md)([UInt64](../../sql-reference/data-types/int-uint.md))) — 所有表和表函数中读取的最大字节数.
- `execution_time` ([Nullable](../../sql-reference/data-types/nullable.md)([Float64](../../sql-reference/data-types/float.md))) — 总查询执行时间, 以秒为单位(挂墙时间).
- `max_execution_time` ([Nullable](../../sql-reference/data-types/nullable.md)([Float64](../../sql-reference/data-types/float.md))) — 查询最大执行时间.
## 另请参阅 {#see-also}
- [查看配额信息](../../sql-reference/statements/show.md#show-quota-statement)
[原始文章](https://clickhouse.com/docs/en/operations/system-tables/quota_usage) <!--hide-->