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Re: What happens if checkpoint haven't completed until the nextcheckpoint interval or max_wal_size? - Mailing list pgsql-hackers

From Michael Paquier
Subject Re: What happens if checkpoint haven't completed until the nextcheckpoint interval or max_wal_size?
Date
Msg-id 20190205114259.GH1882@paquier.xyz
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In response to Re: What happens if checkpoint haven't completed until the nextcheckpoint interval or max_wal_size?  (Robert Haas <robertmhaas@gmail.com>)
Responses Re: What happens if checkpoint haven't completed until the nextcheckpoint interval or max_wal_size?
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On Tue, Feb 05, 2019 at 04:11:55PM +0530, Robert Haas wrote:
> ...not about this part. I think the next checkpoint just doesn't start
> until the one already in progress completes.

Yes, the requests are communicated from any backends to the
checkpointer with shared memory (see ckpt_flags in RequestCheckpoint),
and the backend signals the checkpointer to do the work, still it
won't do the work until the checkpoint currently running finishes.
--
Michael
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