v2.0
- About Uqbar
- Release Note
- Uqbar Installation
- Uqbar Management
- Data Retention Policy
- Time-Series Table Management
- Time-Series Data Write
- Data Compression
- Data Deletion
- Data Query
- Continuous Aggregation
- Time-Series Views
- Cluster Management
- Backup and Restoration
- Security
- GUC Parameters
- SQL Syntax
- Third Party Tools Support
- Glossary
timeseries_views.compression_chunkgroup
The compression_chunkgroup view in the timeseries_views schema allows user to view the compression ratios of all chunk groups in a time-series table. after_compression_size and compression_ratio are not empty only after chunk groups are compressed.
Table 1 compression_chunkgroup columns
| Field | Type | Description |
|---|---|---|
| schemaname | name | Name of a schema to which a time-series table belongs. |
| tablename | name | Name of a time-series table. |
| chunkgroupname | name | Name of a chunk group in a time-series table. |
| before_compression_size | bigint | Size of a chunk group in a time-series table before the chunk group is compressed. The unit is KB. |
| after_compression_size | bigint | Size of a chunk group in a time-series table after the chunk group is compressed. The unit is KB. |
| compression_ratio | float | Compression ratio of a chunk group in a time-series table. |