This topic describes the limits on the TimeSeries model.
Item | Description |
Table name | The name of a time series table must be 1 to 128 bytes in length, and can contain letters, digits, and underscores (_). The name cannot start with a digit. |
Column name | The name of a column in a time series table must be 1 to 128 bytes in length, and can contain lowercase letters, digits, and underscores (_). The name cannot contain _m_name, _data_source, _tags, _time, _meta_update_time, or _attributes. The name cannot start with a digit.
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Name of data fields in a time series | The name of a data field in a time series must be 1 to 128 bytes in length, and can contain letters, digits, and underscores (_). The name cannot start with a digit. |
Measurement name | A measurement name must be a UTF-8-encoded string that is 1 to 128 bytes in length. The name cannot contain number signs (#) or non-printable characters such as spaces. |
Data source | A data source must be a UTF-8-encoded string that is 0 to 256 bytes in length. |
Tags | The tags must be in the ["k1=v1","k2=v2"] format. Each tag consists of a key and a value that are connected by an equal sign (=). The tag key must contain only printable ASCII characters. The tag value can be a UTF-8-encoded string. The tag key and tag value cannot contain double quotation marks (") or equal signs (=). The tags cannot exceed 512 bytes in length. |
Time column | The value of the time column must be greater than or equal to 0. Unit: microseconds (μs). |
Maximum number of columns that can be written at the same time | You can write up to 1,024 attribute columns in a single row to a time series table at the same time. |
Maximum number of rows that can be written at the same time | You can write up to 200 rows to a time series table at the same time. |
Maximum size of data that can be written to a time series table at the same time | You can write up to 4 MB of data to a time series table at the same time. |
Size of the value in a column of the string type | The size of the value in a column of the string type cannot exceed 2 MB. |
Size of the value in a column of the binary type | The size of the value in a column of the binary type cannot exceed 2 MB. |