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| author | Noah Misch <noah@leadboat.com> | 2020-04-25 10:18:12 -0700 |
|---|---|---|
| committer | Noah Misch <noah@leadboat.com> | 2020-04-25 10:18:12 -0700 |
| commit | f246ea3b2a5e0b75e44f0f18157c4b5e10b5547f (patch) | |
| tree | 3570f7790e1244103ce570bbfc8f2171a22f8875 /src/backend/utils/adt/ascii.c | |
| parent | 72a3dc321d76c93842d502793f93b9dc2d2305b2 (diff) | |
| download | postgresql-f246ea3b2a5e0b75e44f0f18157c4b5e10b5547f.tar.gz postgresql-f246ea3b2a5e0b75e44f0f18157c4b5e10b5547f.zip | |
In caught-up logical walsender, sleep only in WalSndWaitForWal().
Before sleeping, WalSndWaitForWal() sends a keepalive if MyWalSnd->write
< sentPtr. When the latest physical LSN yields no logical replication
messages (a common case), that keepalive elicits a reply. Processing
the reply updates pg_stat_replication.replay_lsn. WalSndLoop() lacks
that; when WalSndLoop() slept, replay_lsn advancement could stall until
wal_receiver_status_interval elapsed. This sometimes stalled
src/test/subscription/t/001_rep_changes.pl for up to 10s.
Reviewed by Fujii Masao and Michael Paquier.
Discussion: https://postgr.es/m/20200418070142.GA1075445@rfd.leadboat.com
Diffstat (limited to 'src/backend/utils/adt/ascii.c')
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