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Add support TCP user timeout in libpq and the backend server

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Similarly to the set of parameters for keepalive, a connection parameter
for libpq is added as well as a backend GUC, called tcp_user_timeout.

Increasing the TCP user timeout is useful to allow a connection to
survive extended periods without end-to-end connection, and decreasing
it allows application to fail faster.  By default, the parameter is 0,
which makes the connection use the system default, and follows a logic
close to the keepalive parameters in its handling.  When connecting
through a Unix-socket domain, the parameters have no effect.

Author: Ryohei Nagaura
Reviewed-by: Fabien Coelho, Robert Haas, Kyotaro Horiguchi, Kirk
Jamison, Mikalai Keida, Takayuki Tsunakawa, Andrei Yahorau
Discussion: https://postgr.es/m/EDA4195584F5064680D8130B1CA91C45367328@G01JPEXMBYT04
This commit is contained in:
Michael Paquier
2019-04-06 15:23:37 +09:00
parent 959d00e9db
commit 249d649996
11 changed files with 198 additions and 2 deletions
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4
src/backend/utils/misc/postgresql.conf.sample
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@ -73,7 +73,7 @@
#bonjour_name = '' # defaults to the computer name
# (change requires restart)
# - TCP Keepalives -
# - TCP settings -
# see "man 7 tcp" for details
#tcp_keepalives_idle = 0 # TCP_KEEPIDLE, in seconds;
@ -82,6 +82,8 @@
# 0 selects the system default
#tcp_keepalives_count = 0 # TCP_KEEPCNT;
# 0 selects the system default
#tcp_user_timeout = 0 # TCP_USER_TIMEOUT, in milliseconds;
# 0 selects the system default
# - Authentication -