This topic describes the limits on the TimeSeries model.
Item | Limit |
---|---|
Name of a time series table | The name of a time series table must be 1 to 128 bytes in size, and can contain letters, digits, and underscores (_). The name cannot start with a digit. |
Name of a column in a time series table | The name of a column in a time series table must be 1 to 128 bytes in size, 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.
|
Measurement name | A measurement name must be a UTF-8-encoded string that is 1 to 128 bytes in size. 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 size. |
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. Both the tag key and tag value cannot contain double quotation marks (") or equal signs (=). The tags cannot exceed 512 bytes in size. |
Time column | The value of a time column must be greater than or equal to 0. Unit: microseconds. |
Maximum number of columns that can be written at a time | You can write up to 1,024 attribute columns in a single row to a time series table at a time. |
Maximum number of rows that can be written at a time | You can write up to 200 rows to a time series table at a time. |
Maximum size of data that can be written to a time series table at a time | You can write up to 4 MB of data to a time series table at a 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. |