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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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6
src/include/libpq/libpq-be.h
View File

@@ -155,7 +155,7 @@ typedef struct Port
HbaLine *hba;
/*
* TCP keepalive settings.
* TCP keepalive and user timeout settings.
*
* default values are 0 if AF_UNIX or not yet known; current values are 0
* if AF_UNIX or using the default. Also, -1 in a default value means we
@@ -164,9 +164,11 @@ typedef struct Port
int default_keepalives_idle;
int default_keepalives_interval;
int default_keepalives_count;
int default_tcp_user_timeout;
int keepalives_idle;
int keepalives_interval;
int keepalives_count;
int tcp_user_timeout;
/*
* GSSAPI structures.
@@ -306,9 +308,11 @@ extern ProtocolVersion FrontendProtocol;
extern int pq_getkeepalivesidle(Port *port);
extern int pq_getkeepalivesinterval(Port *port);
extern int pq_getkeepalivescount(Port *port);
extern int pq_gettcpusertimeout(Port *port);
extern int pq_setkeepalivesidle(int idle, Port *port);
extern int pq_setkeepalivesinterval(int interval, Port *port);
extern int pq_setkeepalivescount(int count, Port *port);
extern int pq_settcpusertimeout(int timeout, Port *port);
#endif /* LIBPQ_BE_H */

1
src/include/utils/guc.h
View File

@@ -271,6 +271,7 @@ extern PGDLLIMPORT char *application_name;
extern int tcp_keepalives_idle;
extern int tcp_keepalives_interval;
extern int tcp_keepalives_count;
extern int tcp_user_timeout;
#ifdef TRACE_SORT
extern bool trace_sort;