On 07.12.2010 05:51, Fujii Masao wrote:
On Tue, Dec 7, 2010 at 12:22 PM, Robert Haas<robertmh...@gmail.com>  wrote:
Fair enough. How about increasing the default to 10 seconds?
Since bgwriter has already using 10s as a nap time if there is no
configured activity, I think that 10s is non-nonsense default value.

What do we get out of making this non-configurable?

Which would make the setting of replication simpler, I think.
But I agree to just increase the default value of wal_sender_delay
rather than dropping it.

I dropped the ball on this one..

For comparison, the archiver process and autovacuum launcher wake up once a second to check if postmaster is still alive. bgwriter, when bgwriter_lru_maxpages and archive_timeout are set to 0 to disable it, checks for dead postmaster every 10 seconds.

I'll bump the default for wal_sender_delay to 1 second. Maybe an even higher value would be good, but it also seems good to kill replication connections in a timely fashion if postmaster dies.

  Heikki Linnakangas
  EnterpriseDB   http://www.enterprisedb.com

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