move_chunk()

TimescaleDB allows you to move data and indexes to different tablespaces. This allows you to move data to more cost-effective storage as it ages.

The move_chunk function acts like a combination of the PostgreSQL CLUSTER command and PostgreSQL ALTER TABLE...SET TABLESPACE commands. Unlike these PostgreSQL commands, however, the move_chunk function uses lower lock levels so that the chunk and hypertable are able to be read for most of the process. This comes at a cost of slightly higher disk usage during the operation. For a more detailed discussion of this capability, see the documentation on managing storage with tablespaces.

Note

You must be logged in as a super user, such as the postgres user, to use the move_chunk() call.

SELECT move_chunk(
  chunk => '_timescaledb_internal._hyper_1_4_chunk',
  destination_tablespace => 'tablespace_2',
  index_destination_tablespace => 'tablespace_3',
  reorder_index => 'conditions_device_id_time_idx',
  verbose => TRUE
);

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