Ignore server-side delays when enforcing wal_sender_timeout.
Healthy clients of servers having poor I/O performance, such as
buildfarm members hamster and tern, saw unexpected timeouts. That
disagreed with documentation. This fix adds one gettimeofday() call
whenever ProcessRepliesIfAny() finds no client reply messages.
Back-patch to 9.4; the bug's symptom is rare and mild, and the code all
moved between 9.3 and 9.4.
Discussion: https://postgr.es/m/20180826034600.GA1105084@rfd.leadboat.com
Branch
------
REL9_5_STABLE
Details
-------
https://git.postgresql.org/pg/commitdiff/e3eca937c7432bdbb72cb3033585512cd4438806
Modified Files
--------------
src/backend/replication/walsender.c | 64 +++++++++++++++++++++----------------
1 file changed, 36 insertions(+), 28 deletions(-)
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