Thread: pgsql: Fix the logical replication timeout during large transactions.
Fix the logical replication timeout during large transactions. The problem is that we don't send keep-alive messages for a long time while processing large transactions during logical replication where we don't send any data of such transactions. This can happen when the table modified in the transaction is not published or because all the changes got filtered. We do try to send the keep_alive if necessary at the end of the transaction (via WalSndWriteData()) but by that time the subscriber-side can timeout and exit. To fix this we try to send the keepalive message if required after processing certain threshold of changes. Reported-by: Fabrice Chapuis Author: Wang wei and Amit Kapila Reviewed By: Masahiko Sawada, Euler Taveira, Hou Zhijie, Hayato Kuroda Backpatch-through: 10 Discussion: https://postgr.es/m/CAA5-nLARN7-3SLU_QUxfy510pmrYK6JJb=bk3hcgemAM_pAv+w@mail.gmail.com Branch ------ REL_10_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/a4015ec0375da35e999e86696571ff354a8f706b Modified Files -------------- src/backend/replication/logical/logical.c | 8 ++++++ src/backend/replication/pgoutput/pgoutput.c | 38 ++++++++++++++++++++++++++++- src/backend/replication/walsender.c | 38 +++++++++++++++++++++++++---- src/include/replication/logical.h | 1 + 4 files changed, 79 insertions(+), 6 deletions(-)