At Tue, 5 Feb 2019 20:42:59 +0900, Michael Paquier <mich...@paquier.xyz> wrote in <20190205114259.gh1...@paquier.xyz> > 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.
And, requests for checkpoints are not queued. Multiple checkpoint requests (both automatically and manually) made during a checkpoint are finished at once at the end of the running checkpoint. regards. -- Kyotaro Horiguchi NTT Open Source Software Center
