Description
default_compress_func specifies the default algorithm for compressing table data. You can also specify another compression algorithm when creating a table.
Attributes
Attribute |
Description |
|---|---|
| Type | String |
| Default value | zstd_1.3.8 |
| Value range | |
| Effective upon OBServer node restart | No |
| Modifiable | Yes. You can use the ALTER SYSTEM SET statement to modify the parameter. |
Considerations
The zlib compression algorithm of different minor versions may generate different compression results for the same data. To avoid replica restore failures during an upgrade, the zlib_1.0 compression algorithm is no longer supported in OceanBase Database V4.2.2 and later.
Example
obclient> ALTER SYSTEM SET default_compress_func = 'lz4_1.0';