Wake WALSender to reduce data loss at failover for async commit.
WALSender now woken up after each background flush by WALwriter, avoiding
multi-second replication delay for an all-async commit workload.
Replication delay reduced from 7s with default settings to 200ms and often
much less, allowing significantly reduced data loss at failover.
Andres Freund and Simon Riggs
Branch
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master
Details
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http://git.postgresql.org/pg/commitdiff/2c8a4e9be2730342cbca85150a2a9d876aa77ff6
Modified Files
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src/backend/access/transam/xlog.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)