diff options
| author | Thomas Munro | 2021-04-02 19:52:30 +0000 |
|---|---|---|
| committer | Thomas Munro | 2021-04-02 20:02:41 +0000 |
| commit | c30f54ad732ca5c8762bb68bbe0f51de9137dd72 (patch) | |
| tree | 5086aba82cce9832ed537b726af643d8edf9b89c /src/include/tcop/tcopprot.h | |
| parent | 174edbe9f9c1538ab3347474e96d176223591cd1 (diff) | |
Detect POLLHUP/POLLRDHUP while running queries.
Provide a new GUC check_client_connection_interval that can be used to
check whether the client connection has gone away, while running very
long queries. It is disabled by default.
For now this uses a non-standard Linux extension (also adopted by at
least one other OS). POLLRDHUP is not defined by POSIX, and other OSes
don't have a reliable way to know if a connection was closed without
actually trying to read or write.
In future we might consider trying to send a no-op/heartbeat message
instead, but that could require protocol changes.
Author: Sergey Cherkashin <[email protected]>
Author: Thomas Munro <[email protected]>
Reviewed-by: Thomas Munro <[email protected]>
Reviewed-by: Tatsuo Ishii <[email protected]>
Reviewed-by: Konstantin Knizhnik <[email protected]>
Reviewed-by: Zhihong Yu <[email protected]>
Reviewed-by: Andres Freund <[email protected]>
Reviewed-by: Maksim Milyutin <[email protected]>
Reviewed-by: Tsunakawa, Takayuki/綱川 貴之 <[email protected]>
Reviewed-by: Tom Lane <[email protected]> (much earlier version)
Discussion: https://postgr.es/m/77def86b27e41f0efcba411460e929ae%40postgrespro.ru
Diffstat (limited to 'src/include/tcop/tcopprot.h')
| -rw-r--r-- | src/include/tcop/tcopprot.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/include/tcop/tcopprot.h b/src/include/tcop/tcopprot.h index e5472100a43..241e7c99614 100644 --- a/src/include/tcop/tcopprot.h +++ b/src/include/tcop/tcopprot.h @@ -29,6 +29,7 @@ extern CommandDest whereToSendOutput; extern PGDLLIMPORT const char *debug_query_string; extern int max_stack_depth; extern int PostAuthDelay; +extern int client_connection_check_interval; /* GUC-configurable parameters */ |