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doc-exports/docs/dws/dev/dws_04_0902.html
luhuayi 177cd61a57 DWS DEVG 910.211 version 
Reviewed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com>
Co-authored-by: luhuayi <luhuayi@huawei.com>
Co-committed-by: luhuayi <luhuayi@huawei.com>
2025-05-05 07:44:03 +00:00

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Checkpoints

checkpoint_segments

Parameter description: minimum number of WAL segment files in the period specified by checkpoint_timeout. The size of each log file is 16 MB.

Type: SIGHUP

Value range: an integer. The minimum value is 1.

Default value: 64

Increasing the value of this parameter speeds up the import of big data. Set this parameter based on checkpoint_timeout and shared_buffers. This parameter affects the number of WAL log segment files that can be reused. Generally, the maximum number of reused files in the pg_xlog folder is twice the number of checkpoint segments. The reused files are not deleted and are renamed to the WAL log segment files which will be later used.

Parent topic: Write Ahead Logs