CHECKPOINT

Function

A checkpoint is a point in the transaction log sequence at which all data files have been updated to reflect the information in the log. All data files will be flushed to a disk.

CHECKPOINT forces a transaction log checkpoint. By default, WALs periodically specify checkpoints in a transaction log. You may use gs_guc to specify run-time parameters checkpoint_segments and checkpoint_timeout to adjust the atomized checkpoint intervals.

Precautions

• Only a system administrator has the permission to call CHECKPOINT.
• CHECKPOINT forces an immediate checkpoint when the related command is issued, without waiting for a regular checkpoint scheduled by the system.

Syntax

Checkpoint ::= CHECKPOINT;

Parameter Description

None

Examples

-- Set a checkpoint.
mogdb=# CHECKPOINT;