Hi, It is useful (for debugging purposes) if the checkpoint end message has the checkpoint LSN and REDO LSN [1]. It gives more context while analyzing checkpoint-related issues. The pg_controldata gives the last checkpoint LSN and REDO LSN, but having this info alongside the log message helps analyze issues that happened previously, connect the dots and identify the root cause.
Attaching a small patch herewith. Thoughts? [1] 2021-12-23 14:58:54.694 UTC [1965649] LOG: checkpoint starting: shutdown immediate 2021-12-23 14:58:54.714 UTC [1965649] LOG: checkpoint complete: wrote 0 buffers (0.0%); 0 WAL file(s) added, 0 removed, 0 recycled; write=0.001 s, sync=0.001 s, total=0.025 s; sync files=0, longest=0.000 s, average=0.000 s; distance=0 kB, estimate=0 kB; LSN=0/14D0AD0, REDO LSN=0/14D0AD0 Regards, Bharath Rupireddy.
v1-0001-Add-checkpoint-and-redo-LSN-to-LogCheckpointEnd-l.patch
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